> **EOS PM-1 SPACECRAFT**
>
> **TO**
>
> **EOS GROUND SYSTEM**
>
> **INTERFACE CONTROL DOCUMENT**
>
> **EOS PM PROJECT**
>
> **March 2002**
>
> **Revision A**
>
> ![](media/image1.wmf){width="5.75in" height="1.125in"}
>
> EOS PM-1 SPACECRAFT
>
> TO
>
> EOS GROUND SYSTEM
>
> INTERFACE CONTROL DOCUMENT
>
> EOS PM PROJECT
>
> March 2002
>
> Revision A
>
> NASA Goddard Space Flight Center
>
> Greenbelt, Maryland

EOS PM-1 SPACECRAFT

TO

EOS GROUND SYSTEM

INTERFACE CONTROL DOCUMENT

Based on: TRW Document D22262, Rev. A, Dated June 12, 1999

Modified By:
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

S. Kim

Computer Sciences Corporation

Modified By:
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

C. Wu

EOS-Aqua Systems Manager

Approved By:
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

P. Sabelhaus

EOS-Aqua Project Manager

Approved By:
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

R. Menrad

EOSDIS Project Manager, Acting

CHANGE RECORD PAGE

+----------+---------+---------------------+--------------------------+
| DOCUMENT |         |                     |                          |
| TITLE:   |         |                     |                          |
| EOS PM-1 |         |                     |                          |
| Sp       |         |                     |                          |
| acecraft |         |                     |                          |
| To EOS   |         |                     |                          |
| Ground   |         |                     |                          |
| System   |         |                     |                          |
|          |         |                     |                          |
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| 2002     |         |                     |                          |
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| ISSUE    | DATE    | PAGES AFFECTED      | DESCRIPTION              |
+----------+---------+---------------------+--------------------------+
| Original | 1/2000  | All                 | This Baseline Release    |
|          |         |                     | was developed from the   |
| CH-01    | 3/2002  | All                 | Spacecraft Contractor    |
|          |         |                     | (TRW) deliverable        |
| Revision | 3/2002  | All                 | D22262, Revision A,      |
| A        |         |                     | dated                    |
|          |         |                     |                          |
|          |         |                     | June 12, 1999. (Approved |
|          |         |                     | by CCR \# 422-11-19-003) |
|          |         |                     |                          |
|          |         |                     | Approved by              |
|          |         |                     |                          |
|          |         |                     | CCR# 422-11-19-013       |
|          |         |                     |                          |
|          |         |                     | Approved by              |
|          |         |                     |                          |
|          |         |                     | CCR# 422-11-19-013       |
|          |         |                     |                          |
|          |         |                     | Revision A was approved  |
|          |         |                     | in conjunction with the  |
|          |         |                     | approval of CH-01.       |
+----------+---------+---------------------+--------------------------+

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EOS 420-CM-04 (4/92)

######### TABLE OF CONTENTS

Section 1. INTRODUCTION 1-[1](#section-1.-introduction)

1.1 Purpose 1-[1](#purpose)

1.2 Interface Identification 1-[1](#interface-identification)

Section 2. DOCUMENTS 2-[1](#section-2.-documents)

2.1 Applicable Documents 2-[1](#applicable-documents)

2.1.1 Government Documents 2-[1](#government-documents)

2.1.2 Contractor Documents 2-[1](#contractor-documents)

2.2 Reference Documents 2-[1](#reference-documents)

2.2.1 Government Documents 2-[1](#government-documents-1)

2.2.2 Contractor Documents 2-[2](#contractor-documents-1)

2.2.3 Other Documents 2-[3](#other-documents)

Section 3. OVERVIEW 3-[1](#section-3.-overview)

3.1 S/C COMMAND AND DATA HANDLING SUBSYSTEM
3-[1](#sc-command-and-data-handling-subsystem)

3.2 Command/DATA UPLINK 3-[4](#commanddata-uplink)

3.3 TELEMETRY Downlink 3-[4](#telemetry-downlink)

3.4 Time Management 3-[5](#time-management)

Section 4. COMMANDs and DATA uplink FORMATS
4-[1](#section-4.-commands-and-data-uplink-formats)

4.1 General Command Channel Structure and Processing
4-[1](#general-command-channel-structure-and-processing)

4.1.1 Command Link Transmission Unit
4-[1](#command-link-transmission-unit)

4.1.2 Transfer Frame 4-[2](#transfer-frame)

4.1.3 Frame Acceptance and Reporting Mechanism
4-[2](#frame-acceptance-and-reporting-mechanism)

4.1.4 Command Receipt Verification 4-[2](#command-receipt-verification)

4.2 SUROM, S/C BUS, FMU/SSR AND TIE COMMANDS
4-[2](#surom-sc-bus-fmussr-and-tie-commands)

4.2.1 SUROM Commanding 4-[2](#surom-commanding)

4.2.2 PM-1 (Aqua) S/C Bus TC Packet Format
4-[4](#pm-1-aqua-sc-bus-tc-packet-format)

4.2.3 Formatter-Multiplexer Unit Commanding
4-[4](#formatter-multiplexer-unit-commanding)

4.2.4 Transponder Interface Electronics Commanding
4-[4](#transponder-interface-electronics-commanding)

4.2.5 Clock Maintenance 4-[5](#clock-maintenance)

4.2.6 Stored Command Sequences 4-37

4.3 PM-1 (AQUA) INSTRUMENT COMMANDS
4-[6](#pm-1-aqua-instrument-commands)

4.3.1 PM-1 (Aqua) Instrument TC Packet Format
4-[6](#pm-1-aqua-instrument-tc-packet-format)

4.3.2 AIRS 4-[6](#airs)

4.3.3 AMSU-A1 4-[7](#amsu-a1)

4.3.4 AMSU-A2 4-[7](#amsu-a2)

4.3.5 AMSR-E 4-[7](#amsr-e)

4.3.6 CERES Instruments 4-[7](#ceres-instruments)

4.3.7 MODIS Instrument 4-[7](#modis-instrument)

4.3.8 HSB 4-[8](#hsb)

Section 5. TELEMETRY DATA FORMATS
5-[1](#section-5.-telemetry-data-formats)

5.1 Telemetry Formats 5-[1](#telemetry-formats)

5.2 General Telemetry Structure and Processing
5-[1](#general-telemetry-structure-and-processing)

5.2.1 S-band Real-time Downlink 5-[1](#s-band-real-time-downlink)

5.2.2 X-band Real-time Downlink 5-[1](#x-band-real-time-downlink)

5.2.3 S-band Playback 5-[4](#s-band-playback)

5.2.4 X-band Playback 5-[4](#x-band-playback)

5.3 TELEMETRY DATA STRUCTURE 5-[4](#telemetry-data-structure)

5.3.1 Multiplexing Protocol Data Unit (M_PDU)
5-[4](#multiplexing-protocol-data-unit-m_pdu)

5.3.2 Coded Virtual Channel Data Unit
5-[6](#coded-virtual-channel-data-unit)

5.3.3 Channel Access Data Unit 5-[8](#channel-access-data-unit)

5.3.4 Data Randomization 5-[9](#data-randomization)

5.4 SUROM/TIE TELEMETRY 5-[9](#suromtie-telemetry)

5.4.1 SUROM Telemetry 5-[9](#surom-telemetry)

5.4.2 TIE Status Packet 5-[11](#tie-status-packet)

5.5 PM-1 (AQUA) spacecraft Bus Telemetry
5-[11](#pm-1-aqua-spacecraft-bus-telemetry)

5.5.1 Spacecraft Bus Housekeeping Telemetry Packet Format
5-[15](#spacecraft-bus-housekeeping-telemetry-packet-format)

5.5.2 S/C Bus Memory Dump 5-[17](#sc-bus-memory-dump)

5.5.3 Time Correlation Data Telemetry Format
5-[21](#time-correlation-data-telemetry-format)

5.5.4 Ground Based Attitude Determination Data
5-[22](#ground-based-attitude-determination-data)

5.6 instrument Telemetry 5-[29](#instrument-telemetry)

5.6.1 GIRD Instrument Telemetry Packet Format
5-[29](#gird-instrument-telemetry-packet-format)

5.6.2 AIRS 5-[31](#airs-1)

5.6.3 AMSR-E 5-[31](#amsr-e-1)

5.6.4 AMSU-A1 5-[37](#amsu-a1-1)

5.6.5 AMSU-A2 5-[37](#amsu-a2-1)

5.6.6 HSB 5-[37](#hsb-1)

5.6.7 GIIS Instrument Telemetry Packet Format
5-[38](#giis-instrument-telemetry-packet-format)

5.6.8 MODIS 5-[39](#modis)

5.6.9 CERES 5-[41](#ceres)

APPENDIX A PM-1 (AQUA) COMMANDS/DATA UPLINK SUMMARY
A-[1](#appendix-a-pm-1-aqua-commandsdata-uplink-summary)

APPENDIX B PM-1 (AQUA) TELEMETRY SUMMARY
B-[1](#appendix-b-pm-1-aqua-telemetry-summary)

APPENDIX C ADDITIONAL HOUSEKEEPING DATA FOR SCIENCE DATA ANALYSIS
C-[1](#appendix-c-additional-housekeeping-data-for-science-data-analysis)

C.1 MODIS Requirements: C-[1](#c.1-modis-requirements)

C.2 AIRS, AMSU-A and HSB Requirements
C-[1](#c.2-airs-amsu-a-and-hsb-requirements)

C.2.1 AIRS Passive Analog Telemetry
C-[1](#c.2.1-airs-passive-analog-telemetry)

C.2.2 AMSU-A Passive Analog Telemetry
C-[2](#c.2.2-amsu-a-passive-analog-telemetry)

C.2.3 HSB Active Analog Telemetry
C-[2](#c.2.3-hsb-active-analog-telemetry)

APPENDIX D ACRONYMS D-[1](#appendix-d-acronyms)

FIGURES

Figure 1.2-1. EOS PM-1 (AQUA) Connectivity
1-[3](#__RefHeading___Toc467303593)

Figure 3-1. PM-1 (AQUA) C&DH Subsystem
3-[3](#__RefHeading___Toc467303594)

Figure 4.1-1. Ground Uplinked Command Flow Onboard the S/C
4-[1](#__RefHeading___Toc467303595)

Figure 4.1-2. Telecommand Data Structures
4-[1](#__RefHeading___Toc467303596)

Figure 4.1-3. Packetized Command Data Structure
4-[1](#__RefHeading___Toc467303597)

Figure 4.1.1.2-1. NOP Codeblock Format
4-[1](#__RefHeading___Toc467303598)

Figure 4.1.1.2-2. CLTU Sequence Pattern
4-[1](#__RefHeading___Toc467303599)

Figure 4.1.1.3-1. CLTU Format 4-[1](#__RefHeading___Toc467303600)

Figure 4.1.2.1-1. Transfer Frame Format
4-[2](#__RefHeading___Toc467303601)

Figure 4.1.3.1-1. FARM-1 Sliding Window
4-[2](#__RefHeading___Toc467303602)

Figure 4.1.4.1-1. CLCW Structure 4-[2](#__RefHeading___Toc467303603)

Figure 4.2.1.1-1. SUROM-LSIO TC Packet Format
4-[2](#__RefHeading___Toc467303605)

Figure 4.2.1.1.1-1. SUROM LSIO Interface Command Formats
4-[2](#__RefHeading___Toc467303606)

Figure 4.2.1.1.2-1. SUROM Command Format - Generic
4-[2](#B_Toc381497970)

Figure 4.2.1.1.2-2. SUROM Command Data Format - Generic
4-[3](#__RefHeading___Toc467303608)

Figure 4.2.1.1.3-1. SUROM Commands -- Primary 1553 Data Bus I/F
4-[3](#B_Toc381497970)

Figure 4.2.2-1. PM-1 (AQUA) Spacecraft Bus TC Packet Format
4-[4](#__RefHeading___Toc467303610)

Figure 4.2.2.2-1. Spacecraft Bus Command Structure- Generic
4-[4](#__RefHeading___Toc467303611)

Figure 4.2.2.2.2-1. S/C Bus Memory Load Buffer
4-[4](#__RefHeading___Toc467303612)

Figure 4.2.3.1-1. Generic FMU Command Structure
4-[4](#__RefHeading___Toc467303613)

Figure 4.2.4.1.1-1. TIE Critical Command and Type "BD" Transfer Frame
4-[4](#__RefHeading___Toc467303614)

Figure 4.2.4.1.2-1. TIE Normal Command Format
4-[5](#__RefHeading___Toc467303615)

Figure 4.2.5.2.1-1. GIRD Clock Initiation Format
4-[5](#__RefHeading___Toc467303616)

Figure 4.2.5.2.2-1. CDS Clock Adjustment Format
4-[5](#__RefHeading___Toc467303617)

Figure 4.2.5.3-1. USO Frequency Adjustment Command Word Format
4-[5](#__RefHeading___Toc467303618)

Figure 4.2.6.1-1. Stored Command Format
4-[6](#__RefHeading___Toc467303619)

Figure 4.2.6.1-1. Stored Command Format (Cont'd)
4-[6](#__RefHeading___Toc467303620)

Figure 4.3.1-1. Instrument TC Packet Format
4-[6](#__RefHeading___Toc467303621)

Figure 4.3.2-1. AIRS Data Load Command
4-[6](#__RefHeading___Toc467303622)

Figure 4.3.7.1-1. MODIS Generic Bus Command Structure
4-[7](#__RefHeading___Toc467303623)

Figure 5.2.1-1. S‑band CADU for S/C and Instrument Housekeeping
Telemetry 5-[2](#__RefHeading___Toc467303624)

Figure 5.2.2-1. X-band CADU for Science, Engineering and Housekeeping
Data 5-[3](#__RefHeading___Toc467303625)

Figure 5.3.1.2.2-1. X-Band Fill Packet
5-[6](#__RefHeading___Toc467303626)

Figure 5.3.2.1-1. CVCDU Primary Header
5-[7](#__RefHeading___Toc467303627)

Figure 5.3.3.1.1-1. "Fill" CADU - GN Mode - LRC
5-[8](#__RefHeading___Toc467303628)

Figure 5.3.3.1.2-1. "Fill" CADU - GN Mode - HRC and TDRSS MODE
5-[8](#__RefHeading___Toc467303629)

Figure 5.3.3.1.5-1. X-band Fill CADU 5-[9](#__RefHeading___Toc467303630)

Figure 5.4.1.1-1. SUROM/TIE Telemetry Packet Format
5-[10](#__RefHeading___Toc467303631)

Figure 5.4.2.1-1. TIE Packet Data Field Format
5-[11](#__RefHeading___Toc467303632)

Figure 5.5-1. Telemetry Packet List 5-[12](#__RefHeading___Toc467303633)

Figure 5.5-2. Packet Format Tables for Standard Telemetry
5-[13](#__RefHeading___Toc467303634)

Figure 5.5.1-1. Spacecraft Bus Telemetry Packet Format
5-[16](#__RefHeading___Toc467303635)

Figure 5.5 2-1. Packet Format Tables for Memory Dump
5-[17](#refheading___toc467303636)

Figure 5.5.2.2.1-1. Fault Log Format 5-[19](#refheading___toc467303638)

Figure 5.5.2.2.2-1. Activity Log Format
5-[20](#refheading___toc467303639)

Figure 5.5.2.2.3-1. TMON Format 5-[21](#__RefHeading___Toc467303640)

Figure 5.5.4-1. One-Second GBAD Packet Data Field Format
5-[25](#__RefHeading___Toc467303641)

Figure 5.5.4-2. Four-Second GBAD Packet Data Field Format
5-[26](#refheading___toc467303642)

Figure 5.5.4-3. Eight-Second GBAD Packet Data Field Format
5-[28](#__RefHeading___Toc467303643)

Figure 5.6.1-1. GIRD Instrument Telemetry Packet Format
5-[30](#refheading___toc467303644)

Figure 5.6.3.1-1. AMSR-E Active Bi-level Data Byte Format
5-[32](#__RefHeading___Toc467303645)

Figure 5.6.3.1-2. AMSR-E Housekeeping Data Minor Frame Format
5-[33](#__RefHeading___Toc467303646)

Figure 5.6.3.1-3. AMSR-E Housekeeping Data Packet
5-[34](#__RefHeading___Toc467303647)

Figure 5.6.3.2-1. AMSR-E Science and Engineering Data Packet Format
5-[36](#__RefHeading___Toc467303648)

Figure 5.6.7-1. GIIS Instrument Telemetry Packet Format
5-[39](#__RefHeading___Toc467303651)

Figure 5.6.8.1.1-1. MODIS Data Frame Format
5-[40](#__RefHeading___Toc467303652)

TABLES

Table 3.1-1. Controller Memory Capacity
3-[2](#__RefHeading___Toc519937809)

Table 3.2.1-1. Command Links 3-[4](#__RefHeading___Toc519937810)

Table 3.3-1. Telemetry Downlink 3-[5](#__RefHeading___Toc519937811)

Table 4.1.3-1. FARM-1 Operating States
4-[2](#__RefHeading___Toc519937813)

Table 4.1.3-2. FARM-1 Events 4-[2](#__RefHeading___Toc519937814)

Table 4.2.2.2.1-1. S/C Bus Command Message Formats
4-[4](#__RefHeading___Toc519937815)

Table 4.2.5.3.2-2. Bit Weights of GIIS Time Delta Data Word 4-[**Error!
Bookmark not defined.**](#__RefHeading___Toc519937816)

Table 4.2.5.5.2-1. GIIS Leap Second Adjustment Format
4-[6](#__RefHeading___Toc519937817)

Table 4.2.6-1. SCS State Transitions 4-[6](#__RefHeading___Toc519937818)

Table 4.3.2.1-1. AIRS Reset Command Codes
4-[7](#__RefHeading___Toc519937819)

Table 4.3.3.1.1-1. AMSU-A1 Command Format
4-[7](#__RefHeading___Toc519937820)

Table 4.3.5.1.1-1. AMSR-E Serial Digital Command Format
4-[7](#__RefHeading___Toc519937821)

Table 4.3.5.2-1. AMSR-E Command Timing Constraints
4-[7](#__RefHeading___Toc519937822)

Table 5.5-1. Standard Telemetry Format Table Fields Defined
5-[14](#__RefHeading___Toc519937823)

Table 5.5-3-1. Time Correlation Data Format 5-22

Table 5.5.4-1. One-Second GBAD Packet Data Field Contents
5-[24](#__RefHeading___Toc519937824)

Table 5.5.4-2. Four-Second GBAD Packet Data Field Contents
5-[25](#__RefHeading___Toc519937825)

Table 5.5.4-3. Eight-Second GBAD Packet Data Field Contents
5-[27](#__RefHeading___Toc519937826)

Table 5.5.4-4. GNCC Status Word 2 Bit Pattern
5-[29](#__RefHeading___Toc519937827)

Table 5.6.8.4-1. Bus Memory Dump Initiate Command
5-[41](#__RefHeading___Toc519937828)

Table A-1 Command/Data Format Summary
A-[1](#__RefHeading___Toc519937829)

Table A-2. Telecommand Packet List A-[1](#__RefHeading___Toc519937830)

Table B-1 Telemetry Packet Format Comparison
B-[2](#__RefHeading___Toc519937831)

Table B-2. S-Band GN Mode 16.384/524.288 Kbps Telemetry Packets
B-[3](#__RefHeading___Toc519937832)

Table B-3A. S-Band SN Mode 4.096 Kbps Nominal Telemetry Packets (Packet
List 2) B-[7](#__RefHeading___Toc519937833)

Table B-3B. S-Band SN Mode 4.096 Kbps Engineering Telemetry Packets
(Packet List 3) B-[10](#__RefHeading___Toc519937835)

Table B-3C. S-Band SN Mode 4.096 Kbps Launch and Ascent Telemetry
Packets (Packet List 2) B-[12](#__RefHeading___Toc519937836)

Table B-4A. S-Band SN Mode 1.024 Kbps Survival/Safe Telemetry Packets
(Packet List 0) B-[14](#__RefHeading___Toc519937837)

Table B-4B. S-Band SN Mode 1.024 Kbps Launch and Ascent Telemetry
Packets (Packet List 3) B-[15](#__RefHeading___Toc519937838)

Table B-5. X-band DB/DP Mode 15/150 Mbps Telemetry Packets
B-[16](#__RefHeading___Toc519937839)

########### Section 1. INTRODUCTION

##################### 1.1 Purpose

This Interface Control Document (ICD) defines the data format interface
between the EOS PM-1 (Aqua) Spacecraft and the EOS Ground System.
Specifically, this ICD documents the command and telemetry data formats
for the EOS PM-1 (Aqua) Spacecraft Bus (i.e. spacecraft subsystems) and
the on-board instruments, and any command constraints that are imposed
on the ground system by the spacecraft subsystems or the instruments.

Appendix A and Appendix B provide a concise summary of the commands and
telemetry. Refer to the main body of the ICD for more details.

This ICD does not provide detailed command and telemetry lists for the
Spacecraft. The command and telemetry lists are provided in the PM-1
Command Allocation Document and PM‑1 Telemetry Allocation Document,
reference section 2.2.2, Documents 9 and 10.

EOS PM-1 (Aqua) S/C requirements, S/C states, and subsystem operating
modes may be found in the Contract End Item Specification, reference
section 2.1.2, Document 1, and the respective subsystem specifications.

This ICD does not cover the RF interface other than that presented
herein. For additional RF information, reference the Radio Frequency
Interface Control Document between EOS PM-1 Spacecraft (SC) and
Spaceflight Tracking and Data Network (GN), and the Radio Frequency
Interface Control Document between EOS PM-1 Spacecraft and the EOS Polar
Ground Station (EPGS) or Wallops Orbital Tracking Station (WPS),
reference section 2.2.1, Documents 10 and 11.

Command and Data Handling (C&DH) interfaces and S/C timing control
interfaces are as defined in section 2.2.2, Document 12.

Flight Software requirements and descriptions are defined in Section
2.1.2, Document 3.

This document does not cover operation plans or procedures other than
that defined herein. For operational information, reference section
2.2.2, Document 1 and 16.

##################### 1.2 Interface Identification

Figure 1.2-1 depicts the EOS PM-1 (Aqua) connectivity.

The data formats are consistent with the Recommendations of the
Consultative Committee for Space Data Systems (CCSDS). Specific CCSDS
options selected for EOS PM-1 (Aqua) are documented in this ICD.

The spacecraft communications use S‑band and X-band links. The data
format for S-band commands and telemetry will be Non-Return to
Zero-Level (NRZ-L). The X-band data format will be Non-Return to
Zero-Mark (NRZ-M).

The S-band section of the spacecraft Communications Subsystem supports
telemetry, command (T&C) and tracking via the Ground Network (GN) Polar
Ground Stations (PGSs). The Space Network (SN) supports routine S/C
clock correlation and tracking, as well as command and telemetry support
for special and emergency operations. In addition, Wallops Ground
Station (WGS) provides back-up S-band support.

The X‑band section of the Communications Subsystem provides the science
and engineering data downlink for the EOS PM-1 (Aqua) common spacecraft.
Two modes of operation are provided:

1)  In the Direct Playback (DP) mode stored science and engineering data
    is transmitted, at 150 Mbps, to one of the four northern latitude
    PGSs (Alaska and Norway);

2)  In the Direct Broadcast (DB) mode all real-time science and
    engineering data is broadcast, at 15 Mbps, to any receiving station
    with line of sight view.

![](media/image2.wmf){width="6.499305555555556in"
height="5.955555555555556in"}

[]{#__RefHeading___Toc467303593 .anchor}Figure 1.2-1. EOS PM-1 (Aqua)
Connectivity

########### Section 2. DOCUMENTS

##################### 2.1 Applicable Documents

The following documents of the exact issue shown form a part of this ICD
to extent specified herein. If no revision or date is specified, the
latest issue of the applicable document shall apply. In the event of
conflict between this ICD and the documents listed below, the documents
below shall govern.

############################### 2.1.1 Government Documents

  ----- ------------------ -----------------------------------------------
  1\.   GSFC 422-11-12-01  General Interface Requirements Document (GIRD)
                           for EOS Common Spacecraft/Instruments, Revision
                           B, August 1998

  2\.   GSFC 420-03-02     General Instrument Interface Specification

  3\.   GSFC 422-13-11-01  EOS Common Spacecraft Specification, August
                           1994
  ----- ------------------ -----------------------------------------------

############################### 2.1.2 Contractor Documents

  ----- ------------------ -----------------------------------------------
  1\.   SY1-0029           EOS Common Spacecraft Contract End Item (CEI)
                           Specification

  2\.   D26468             EOS PM-1 Spacecraft Time Management

  3\.   ES-SDA-001-01B     EOS PM-1 Spacecraft Flight Software
                           Requirements Specification
  ----- ------------------ -----------------------------------------------

##################### 2.2 Reference Documents

The following documents are used for reference purposes only. These
documents do not form a part of this ICD and are not controlled by their
reference herein. In the event of a conflict between this ICD and
documents listed below, this ICD shall govern.

############################### 2.2.1 Government Documents

  ------ ---------------- --------------------------------------------------
  1\.    CCSDS 101.0-B‑3  Recommendation For Space Data Systems Standards;
                          Telemetry Channel Coding, May 1992

  2\.    CCSDS 102.0-B‑3  Recommendation For Space Data Systems Standards;
                          Packet Telemetry, November 1992

  3\.    CCSDS 201.0-B‑2  Recommendation For Space Data Systems Standards;
                          Telecommand, Part 1, Channel Service, November
                          1995

  4\.    CCSDS 202.0-B‑2  Recommendation For Space Data Systems Standards;
                          Telecommand, Part 2, Data Routing Service,
                          November 1992

  5\.    CCSDS 202.1-B‑1  Recommendation For Space Data Systems Standards;
                          Telecommand, Part 2.1, Command Operation
                          Procedures, October 1991

  6\.    CCSDS 203.0‑B‑1  Recommendation For Space Data Systems Standards;
                          Telecommand, Part 3, Data Management Service,
                          January 1987

  7\.    CCSDS 301.0-B‑2  Recommendation For Space Data Systems Standards;
                          Time Code Formats, April 1990

  8\.    CCSDS 701.0-B‑2  Recommendation For Space Data Systems Standards;
                          Advanced Orbiting Systems, Networks and Data
                          Links, Architectural Specification, November 1992

  9\.    530-SNUG         Space Network (SN) User's Guide, Rev. 7, November
                          1995

  10\.   450-RFICD-EOS    Radio Frequency Interface Control Document between
         PM-1/STDN        EOS PM-1 Spacecraft and Spaceflight Tracking and
                          Data Network (GN)

  11\.   450-RFICD-EOS    Radio Frequency Interface Control Document between
         PM-1/EPGS/WPS    EOS PM-1 Spacecraft and the EOS Polar Ground
                          Stations (EPGS) and the Wallops Orbital Tracking
                          Station (WPS)

  12\.   530-UGD-GN       Ground Network (GN) Users Guide, June 1993

  13\.   531-TR-001       Users Spacecraft Clock Calibration System (USCCS)
                          User's Guide, NASA GSFC, Greenbelt, Maryland

  14\.   MIL-STD-1750A\   Military Standard Sixteen-Bit Computer Instruction
         Notice 1         Set Architecture, May 1982
  ------ ---------------- --------------------------------------------------

############################### 

############################### 2.2.2 Contractor Documents

  ------ ---------------- --------------------------------------------------
  1\.    D26682           Flight Operations Handbook

  2\.    D24843           Interface Control Document for the Atmospheric
                          Infrared Spectrometer (AIRS)

  3\.    D24844           Interface Control Document for the Advanced
                          Microwave Sounding Unit 1 (AMSU-A1)

  4\.    D24845           Interface Control Document for the Advanced
                          Microwave Sounding Unit 2 (AMSU-A2)

  5\.    D24846           Interface Control Document for the Clouds and
                          Earth\'s Radiant Energy System (CERES)

  6\.    D24847           Interface Control Document for the Moderate
                          Resolution Imaging Spectroradiometer (MODIS)

  7\.    D24848           Interface Control Document for the Advanced
                          Microwave Scanning Radiometer for EOS (AMSR-E)

  8\.    D24849           Interface Control Document for the Humidity
                          Sounder for Brazil (HSB)

  9\.    D25099           PM-1 Command Allocation Document

  10\.   D25100           PM-1 Telemetry Allocation Document

  11\.   SS6-0165         EOS PM-1 Spacecraft Communications Subsystem
                          Specification

  12\.   SS6-0164         EOS PM-1 Spacecraft Command and Data Handling
                          Subsystem Requirements Specification

  13\.   TBD              

  14\.   EQ4 -4951        EOS Common Spacecraft Equipment Specification for
                          Formatter-Multiplexer/Solid State Recorder Unit
                          (FMU/SSR)

  15     EQ 4-4957        EOS PM-1 Spacecraft Equipment Specification for
                          Transponder Interface Electronics

  16     D26683           Flight Operations Procedures
  ------ ---------------- --------------------------------------------------

############################### 2.2.3 Other Documents

  ----- ---------------- --------------------------------------------------
  1\.   34111515SRS      Software Requirements Specification for the Earth
                         Observing System Common Processors Startup ROM
                         (SUROM), Computer Software Configuration Item
                         (CSCI), Rev. A, Honeywell Inc., Feb. 19, 1998

  2\.   151840           MODIS Command, Telemetry, Science and Engineering
                         Description, Santa Barbara Remote Sensing, May
                         1997
  ----- ---------------- --------------------------------------------------

########### Section 3. OVERVIEW

This section provides an overview of the PM-1 (Aqua) Spacecraft command
and telemetry links as defined in Section 1.2 and the on-board Time
Management System.

##################### 3.1 S/C COMMAND AND DATA HANDLING SUBSYSTEM

The PM-1 (Aqua) Spacecraft Command and Data Handling (C&DH) subsystem
components are shown in Figure 3-1.

The C&DH subsystem consists of the Transponder Interface Electronics
(TIE), the Command Telemetry Controller (CTC), the Instrument Support
Controller (ISC), the Power Controller (PC), the Guidance, Navigation
and Control Controller (GNCC), the Formatter/Multiplexer Unit/Solid
State Recorder (FMU/SSR), and three Ultra Stable Oscillators (USOs).

Each of the four controllers consists of a 1750A processor and the
interface electronics for collecting telemetry, distributing commands,
and for communications with other spacecraft subsystems. Each controller
is internally redundant. One side of each controller is designated as
the on-line controller. The other side is designated off-line and may be
powered on (CTC) or off (PC, GNCC, and ISC). The TIE is internally
redundant, with both sides powered on, and designated the Online or
Offline TIE. The USOs are also internally redundant, with one side
powered on and the other off. The FMU is redundant, with one side
powered on. The SSR is redundant, but the memory is not. The memory is
designed to provide the required storage capacity at the end of life,
based on the expected memory failure rate.

The CTC is the Bus Controller (BC) for the Primary Command and Telemetry
(C&T) 1553 Data Bus. The PC, ISC, GNCC, TIE, FMU, MODIS, AIRS,
AMSU-A1&A2 and the two CERES instruments, and off-line CTC controller
are Remote Terminals (RTs) on that Bus. The CTC, GNCC, and PC each also
have a secondary 1553 data bus, and are the Bus Controllers for those
busses.

The controllers collect the housekeeping data, build data packets for
unpacketized data, and transmit the packets to the TIE, via the Primary
1553 Data Bus. The housekeeping data packets are also routed to the SSR,
via the FMU for formatting and storage. The TIE routes the housekeeping
data packets stored in the SSR and real time housekeeping data packets
to the transponder for concurrent S-band downlink to the ground.
Instrument science and engineering data and spacecraft and instrument
housekeeping data are collected/formatted by the FMU and stored in the
SSR for later playback or real-time broadcast to the ground via the
X-band. The memory capacities of each of the PM-1 (Aqua) Spacecraft
controllers are provided in Table 3.1‑1.

[]{#__RefHeading___Toc519937809 .anchor}Table 3.1-1. Controller Memory
Capacity

+------------------------------------+----------------------------------+
| Controller                         | Size                             |
+------------------------------------+----------------------------------+
| Command and Telemetry              | 768K Words of RAM                |
|                                    |                                  |
|                                    | 512K Words of EEPROM             |
|                                    |                                  |
|                                    | 16K Words of PROM                |
|                                    |                                  |
|                                    | 8K Words of I/O RAM              |
+------------------------------------+----------------------------------+
| Instrument Support                 | 256 Words of RAM                 |
|                                    |                                  |
|                                    | 16K Words of PROM                |
|                                    |                                  |
|                                    | 8K Words of I/O RAM              |
+------------------------------------+----------------------------------+
| GN&C                               | 256K Words of RAM                |
|                                    |                                  |
|                                    | 16K Words of PROM                |
|                                    |                                  |
|                                    | 8K Words of I/O RAM              |
+------------------------------------+----------------------------------+
| Power                              | 256K Words of RAM                |
|                                    |                                  |
|                                    | 16K Words of PROM                |
|                                    |                                  |
|                                    | 8K Words of I/O RAM              |
+------------------------------------+----------------------------------+

![](media/image3.wmf){width="6.5in" height="7.972222222222222in"}

[]{#__RefHeading___Toc467303594 .anchor}Figure 3-1. PM-1 (Aqua) C&DH
Subsystem

##################### 3.2 Command/DATA UPLINK

Command data structures associated format requirements and description
are provided in Section 4.

The PM-1 (Aqua) Spacecraft receives commands/data uplink at the rates
(which includes all CCSDS overhead) shown in Table 3.2.1-1.

[]{#__RefHeading___Toc519937810 .anchor}Table 3.2.1-1. Command Links

+-------------+-------------+--------------+--------------------------+
| External    | Spacecraft  | Data Rate    | Usage                    |
| Interface   |             |              |                          |
|             | Omni        | (bps)        |                          |
|             | Antenna^1^  |              |                          |
+-------------+-------------+--------------+--------------------------+
| TDRSS SSA   | Zenith      | 1000         | Command and Tracking     |
+-------------+-------------+--------------+--------------------------+
| TDRSS SSA   | Zenith      | 500          | Command and Tracking     |
+-------------+-------------+--------------+--------------------------+
| TDRSS SSA   | Zenith      | 250          | Command and Tracking     |
+-------------+-------------+--------------+--------------------------+
| TDRSS SSA   | Zenith      | 125          | Command and Tracking     |
+-------------+-------------+--------------+--------------------------+
| TDRSS MA    | Zenith      | 125          | Command and Tracking     |
+-------------+-------------+--------------+--------------------------+
| PGSs &WGS   | Nadir       | 2000         | Command and Tracking^2^  |
+-------------+-------------+--------------+--------------------------+

Note 1: For command links Zenith and Nadir Omni antennae are coupled
together.

Note 2: Only Doppler tracking is available through the ground station.
Ranging is not available.

##################### 3.3 TELEMETRY Downlink

S-band housekeeping and X-band science, engineering and housekeeping
data structures and associated format requirements are described in
Section 5.

The science data formats for the instruments are specified in Section
2.1.1, Documents 1 and 2. For more detailed format information refer to
the specific instrument ICD, reference section 2.2.2, Documents 2 - 8.

In the GN mode, the spacecraft S-band design is capable of simultaneous
downlink of two telemetry channels to a PGS. The High Rate Channel (HRC)
will carry the stored data at 524.288 Kbps. The Low Rate Channel (LRC)
will carry the real-time data at 16.384 Kbps.

For the TDRSS links, the I and Q channels will have identical data and
rates. The two channels will be combined at the TDRSS ground station for
increased link margin. S-band downlink rates using the TDRSS will be
1.024 Kbps or 4.096 Kbps.

The Spacecraft supports simultaneous downlink of real time S-band
housekeeping data and playback X-band science and engineering data, but
does not support simultaneous S-band and X-band playback due to SSR
output limitations. The 150 Mbps DP and 15 Mbps DB modes of the X-band
are mutually exclusive.

The downlinks are shown in Table 3.3-1. The telemetry data rates in the
Table include CCSDS and Reed-Solomon coding overhead.

[]{#__RefHeading___Toc519937811 .anchor}Table 3.3-1. Telemetry Downlink

+----------+---------+------+-----+----------------------------------+
| Return   | Spa     | Down |     | Usage                            |
| Link     | cecraft | link |     |                                  |
| Service  | Antenna | Rat  |     |                                  |
|          |         | e^1^ |     |                                  |
+----------+---------+------+-----+----------------------------------+
|          |         | I    | **  |                                  |
|          |         |      | Q** |                                  |
+----------+---------+------+-----+----------------------------------+
| Direct   | X-Band  | 75   | 75  | Stored science and engineering   |
|          |         |      |     | data to PGS. Data Rate = 150     |
| Playback |         | Mbps | M   | Mbps                             |
| (DP)     |         |      | bps |                                  |
+----------+---------+------+-----+----------------------------------+
| Direct   | X-Band  | 7.5  | 7.5 | All real-time science and        |
|          |         |      |     | engineering data to Direct       |
| B        |         | Mbps | M   | Broadcast ground stations. Data  |
| roadcast |         |      | bps | Rate = 15 Mbps                   |
| (DB)     |         |      |     |                                  |
+----------+---------+------+-----+----------------------------------+
| TDRSS MA | S-Band\ | 1    | 1.  | Selected real-time data          |
|          | Zenith  | .024 | 024 | (engineering or diagnostic) or   |
|          | Omni    | Kbps | K   | controller data dump. Identical  |
|          |         |      | bps | Data on I & Q channels.          |
+----------+---------+------+-----+----------------------------------+
| TDRSS    | S-band\ | 4    | 4.  | Selected real-time data          |
| SSA      | Zenith  | .096 | 096 | (engineering or diagnostic) or   |
|          | Omni    | Kbps | K   | controller data dump. Identical  |
|          |         |      | bps | Data on I & Q channels.          |
+----------+---------+------+-----+----------------------------------+
| TDRSS    | S-band  | 1    | 1.  | Selected real-time data          |
| SSA      |         | .024 | 024 | (engineering or diagnostic) or   |
|          | Zenith  | Kbps | K   | controller data dump. Identical  |
|          | Omni    |      | bps | Data on I & Q channels           |
+----------+---------+------+-----+----------------------------------+
|          |         | **L  | *   |                                  |
|          |         | RC** | *HR |                                  |
|          |         |      | C** |                                  |
+----------+---------+------+-----+----------------------------------+
| PGSs/\   | S-Band\ | 16   | 52  | LRC = Real-time Housekeeping     |
| WGS      | Nadir   | .384 | 4.2 | Data\                            |
| S-Band   | Omni    | Kbps | 88K | HRC = Stored Housekeeping or     |
|          |         |      | bps | Controller Data Dump             |
+----------+---------+------+-----+----------------------------------+

Note:

1\. The downlink rates include Reed-Solomon and CCSDS overhead.

##################### 3.4 Time Management

The User Spacecraft Clock Calibration System (USCCS) (see Section 2.1.2,
Document 3) will be used for EOS PM-1 (Aqua) Spacecraft clock
correlation. The TIE provides time transfer data in telemetry based on
TDRSS PN epochs for ground determination of the accuracy of the
spacecraft clock.

PM-1 (Aqua) time management approach is described in Document 2, section
2.1.2. The S/C time management function maintains S/C GIRD time in CCSDS
Unsegmented Time Code (CUC) format (Figure 5.6.1-1) for use by the
spacecraft and the AIRS, AMSU-A, AMSR-E and HSB instruments. The time
management function also maintains time in the CCSDS Day Segmented Time
Code (CDS), (Figure 5.6.7-1), for use by the CERES and MODIS
instruments.

The TIE provides master clocks for GIRD Time and GIIS Time. The GIRD
master clock is maintained as a 64-bit counter with a resolution of
476.8 nanoseconds (ns). The GIIS Time master clock is maintained in the
CDS format with a resolution of 1 microseconds (µs). The Flight Software
Time Management function provides for adjustments to the master clocks,
but does not provide for initialization of the master clocks. The ground
has the capability to initialize the master clocks on the online and
off-line TIE via direct commands to the TIE.

########### Section 4. COMMANDs and DATA uplink FORMATS

This section details the requirements for the uplink data formats and
structures.

Additional information regarding the CCSDS formats may be found in
Section 2.2.1 Documents 1 - 8.

Additional S/C Flight Software detail and content may be found in
Section 2.1.2, Document 3.

Additional SUROM information, command format and content may be found in
Section 2.1.2, Document 3 and Section 2.2.3, Document 1.

For Instrument format and content, Reference Section 2.2.2, Documents
2-8, (Instrument specific) and Section 2.2.3, Document 2 (MODIS
specific).

The Command Allocation Document (CAD), Reference Section 2.2.2, Document
9 provides additional information on the command and command database.

For additional information regarding the CCSDS Time Management formats
and detail, Reference Section 2.2.1, Document 7. For additional
information regarding the S/C Time Management formats and detail,
Reference Section 2.1.2, Document 2.

**Security Note: Per "NASA Internet Publishing Content Guidelines,
Information That Must [Not]{.underline} Be Published Via the Internet",
the remaining text in this section except for the paragraph, figure, and
table titles have been removed.**

##################### 4.1 General Command Channel Structure and Processing

[]{#__RefHeading___Toc467303595 .anchor}Figure 4.1-1. Ground Uplinked
Command Flow Onboard the S/C

[]{#__RefHeading___Toc467303596 .anchor}Figure 4.1-2. Telecommand Data
Structures

[]{#__RefHeading___Toc467303597 .anchor}Figure 4.1-3. Packetized Command
Data Structure

############################### 4.1.1 Command Link Transmission Unit

######################################### 4.1.1.1 RF Acquisition Lock

######################################### 4.1.1.2 TIE Receiver Lock

[]{#__RefHeading___Toc467303598 .anchor}Figure 4.1.1.2-1. NOP Codeblock
Format

[]{#__RefHeading___Toc467303599 .anchor}Figure 4.1.1.2-2. CLTU Sequence
Pattern

######################################### 4.1.1.3 CLTU Format

[]{#__RefHeading___Toc467303600 .anchor}Figure 4.1.1.3-1. CLTU Format

############################### 4.1.2 Transfer Frame

######################################### 4.1.2.1 Transfer Frame Format and Content

[]{#__RefHeading___Toc467303601 .anchor}Figure 4.1.2.1-1. Transfer Frame
Format

################################################### 4.1.2.2 Transfer Frame Control Commands

############################### 4.1.3 Frame Acceptance and Reporting Mechanism

######################################### 4.1.3.1 FARM-1 Sliding Window

[]{#__RefHeading___Toc519937813 .anchor}Table 4.1.3-1. FARM-1 Operating
States

[]{#__RefHeading___Toc519937814 .anchor}Table 4.1.3-2. FARM-1 Events

[]{#__RefHeading___Toc467303602 .anchor}Figure 4.1.3.1-1. FARM-1 Sliding
Window

############################### 4.1.4 Command Receipt Verification

######################################### 4.1.4.1 Command Link Control Word

[]{#__RefHeading___Toc467303603 .anchor}Figure 4.1.4.1-1. CLCW Structure

##################### 4.2 SUROM, S/C BUS, FMU/SSR AND TIE COMMANDS

############################### 4.2.1 SUROM Commanding

######################################### 4.2.1.1 SUROM -- LSIO Telecommand Packet Format

[]{#__RefHeading___Toc467303605 .anchor}Figure 4.2.1.1-1. SUROM -- LSIO
TC Packet Format

################################################### 4.2.1.1.1 SUROM Commands - LSIO Interface

################################################### 4.2.1.1.2 SUROM Commands - Primary 1553 Data Bus Interface Formats - Generic

################################################### 4.2.1.1.3 SUROM Commands - Primary 1553 Data Bus (1553B) Interface 

################################################### 4.2.1.1.4 SUROM FW Start-up Control

[]{#__RefHeading___Toc467303606 .anchor}Figure 4.2.1.1.1-1. SUROM LSIO
Interface Command Formats

**Figure 4.2.1.1.1-1. SUROM LSIO Interface Command Formats (Cont'd)**

> []{#B_Toc381497970 .anchor}

Figure 4.2.1.1.2-1. SUROM Command Format - Generic

[]{#__RefHeading___Toc467303608 .anchor}Figure 4.2.1.1.2-2. SUROM
Command Data Format - Generic

Figure 4.2.1.1.3-1. SUROM Commands -- Primary 1553 Data Bus I/F

**Figure 4.2.1.1.3-1. SUROM Commands -- Primary 1553 Data Bus I/F
(Cont'd)**

**Figure 4.2.1.1.3-1. SUROM Commands -- Primary 1553 Data Bus I/F
(Cont'd)**

**Figure 4.2.1.1.3-1. SUROM Commands -- Primary 1553 Data Bus I/F
(Cont'd)**

############################### 4.2.2 PM-1 (Aqua) S/C Bus TC Packet Format

######################################### 4.2.2.1 APID

######################################### 4.2.2.2 Spacecraft Bus Commands

[]{#__RefHeading___Toc467303610 .anchor}Figure 4.2.2-1. PM-1 (Aqua)
Spacecraft Bus TC Packet Format

[]{#__RefHeading___Toc467303611 .anchor}Figure 4.2.2.2-1. Spacecraft Bus
Command Structure- Generic

################################################### 4.2.2.2.1 Spacecraft Bus Command Message Formats

[]{#__RefHeading___Toc519937815 .anchor}Table 4.2.2.2.1-1. S/C Bus
Command Message Formats

Table 4.2.2.2.1-1. S/C Bus Command Message Formats (Cont'd)

Table 4.2.2.2.1-1. S/C Bus Command Message Formats (Cont'd)

######################################### 4.2.2.2.2 S/C Bus Memory Loads

######################################### 4.2.2.3 S/C Bus TC Packet Checksum

[]{#__RefHeading___Toc467303612 .anchor}Figure 4.2.2.2.2-1. S/C Bus
Memory Load Buffer

############################### 4.2.3 Formatter-Multiplexer Unit Commanding

######################################### 4.2.3.1 FMU/SSR Command Structures

[]{#__RefHeading___Toc467303613 .anchor}Figure 4.2.3.1-1. Generic FMU
Command Structure

############################### 4.2.4 Transponder Interface Electronics Commanding

######################################### 4.2.4.1 TIE Commands

################################################### 4.2.4.1.1 TIE Critical Commands

[]{#__RefHeading___Toc467303614 .anchor}Figure 4.2.4.1.1-1. TIE Critical
Command and Type "BD" Transfer Frame

################################################### 4.2.4.1.1.1 Non-Operation Commands

################################################### 4.2.4.1.1.2 TIE Configuration Commands

################################################### 4.2.4.1.1.3 TIE Critical Relay Commands

################################################### 4.2.4.1.1.4 TIE Critical Relay Command Rate Constraints

######################################### 4.2.4.1.2 TIE Normal Command Structures

[]{#__RefHeading___Toc467303615 .anchor}Figure 4.2.4.1.2-1. TIE Normal
Command Format

############################### 4.2.5 Clock Maintenance

######################################### 4.2.5.1 Clock Accuracy

######################################### 4.2.5.2 Clock Initialization Commanding

################################################### 4.2.5.2.1 GIRD Clock Initialization Commands

[]{#__RefHeading___Toc467303616 .anchor}Figure 4.2.5.2.1-1. GIRD Clock
Initiation Format

################################################### 4.2.5.2.1.1 GIRD Time Initialization Constraints

################################################### 4.2.5.2.2 GIIS Clock Initialization

[]{#__RefHeading___Toc467303617 .anchor}Figure 4.2.5.2.2-1. CDS Clock
Adjustment Format

######################################### 4.2.5.3 Minor Time Adjustment

################################################### 4.2.5.3.1 GIRD Time Adjustment

**4.2.5.3.1.1 GIRD Time Adjustment Constraints**

################################################### 4.2.5.3.2 GIIS Time Adjustment

######################################### 4.2.5.4 USO Frequency Adjustment Command

[]{#__RefHeading___Toc467303618 .anchor}Figure 4.2.5.3-1. USO Frequency
Adjustment Command Word Format

#########################################  4.2.5.5 Leap Second Adjustment

################################################### 4.2.5.5.1 GIRD Leap Second Adjustment

################################################### 4.2.5.5.2 GIIS Leap Second Adjustment

[]{#__RefHeading___Toc519937817 .anchor}Table 4.2.5.5.2-1. GIIS Leap
Second Adjustment Format

######################################### 4.2.5.6 Time Re-Synchronization Commands

################################################### 4.2.6 Stored Command Sequences

[]{#__RefHeading___Toc519937818 .anchor}Table 4.2.6-1. SCS State
Transitions

################################################### 4.2.6.1 Stored Command Formats

[]{#__RefHeading___Toc467303619 .anchor}Figure 4.2.6.1-1. Stored Command
Format

**Figure 4.2.6.1-1. Stored Command Format (Cont'd)**

[]{#__RefHeading___Toc467303620 .anchor}**Figure 4.2.6.1-1. Stored
Command Format (Cont'd)**

##################### 4.3 PM-1 (AQUA) Instrument COMMANDS

############################### 4.3.1 PM-1 (Aqua) Instrument TC Packet Format

[]{#__RefHeading___Toc467303621 .anchor}Figure 4.3.1-1. Instrument TC
Packet Format

######################################### 4.3.1.1 Instrument TC Packet Checksum

######################################### 4.3.1.2 Instrument Command Field

############################### 4.3.2 AIRS 

[]{#__RefHeading___Toc467303622 .anchor}Figure 4.3.2-1. AIRS Data Load
Command

######################################### 4.3.2.1 AIRS Reset Command

[]{#__RefHeading___Toc519937819 .anchor}Table 4.3.2.1-1. AIRS Reset
Command Codes

######################################### 4.3.2.2 AIRS Command Constraints 

############################### 4.3.3 AMSU-A1 

######################################### 4.3.3.1 AMSU-A1 Instrument Commands

######################################### 4.3.3.1.1 AMSU-A1 Command Format

[]{#__RefHeading___Toc519937820 .anchor}Table 4.3.3.1.1-1. AMSU-A1
Command Format

######################################### 4.3.3.2 AMSU-A1 Reset Command

######################################### 4.3.3.3 AMSU-A1 Command Constraints

############################### 4.3.4 AMSU-A2 

######################################### 4.3.4.1 AMSU-A2 Instrument Commands

############################### 4.3.5 AMSR-E

######################################### 4.3.5.1 AMSR-E Commands

######################################### 4.3.5.1.1 AMSR-E SDM Command Formats

[]{#__RefHeading___Toc519937821 .anchor}Table 4.3.5.1.1-1. AMSR-E Serial
Digital Command Format

######################################### 4.3.5.1.2 AMSR-E Discrete Commands

######################################### 4.3.5.2 AMSR-E Command Constraints

[]{#__RefHeading___Toc519937822 .anchor}Table 4.3.5.2-1. AMSR-E Command
Timing Constraints

############################### 4.3.6 CERES Instruments

######################################### 4.3.6.1 CERES Instrument Commands 

######################################### 4.3.6.1.1 CERES Command Constraints

############################### 4.3.7 MODIS Instrument

######################################### 4.3.7.1 MODIS Command Message Formats 

[]{#__RefHeading___Toc467303623 .anchor}Figure 4.3.7.1-1. MODIS Generic
Bus Command Structure

######################################### 4.3.7.2 MODIS Command Constraints

############################### 4.3.8 HSB

######################################### 4.3.8.1 HSB Level Discrete Commands

######################################### 4.3.8.2 HSB Pulse Discrete Commands 

######################################### 4.3.8.4 HSB Command Constraints

########### Section 5. TELEMETRY DATA FORMATS

##################### 5.1 Telemetry Formats

This section will describe the Telemetry Data Message Format and Content
to be sent from the PM-1 (Aqua) spacecraft (S/C) to EOS Ground Systems.

For additional information on the CCSDS Recommendations on Telemetry,
reference section 2.2.1, Documents 1, 2, and 8.

For additional information on S/C telemetry format and content,
telemetry format tables, S/C telemetry process reference section 2.1.2,
Documents 3.

For additional SUROM telemetry detail, reference section 2.2.3, Document
1.

##################### 5.2 General Telemetry Structure and Processing

The general downlink structure for the Housekeeping (H/K) telemetry,
diagnostic telemetry, and science and engineering data is the Channel
Access Data Unit (CADU) and the basic unit of S/C or Instrument
telemetry shall be the CCSDS Path Protocol Data Unit as specified in
Section 2.2.1, Document 8.

The following is a brief overview of the S/C telemetry. Details of
telemetry data structure, coding and randomization are described in
Section 5.3.

############################### 5.2.1 S-band Real-time Downlink

Instrument and Spacecraft H/K packets are transmitted, via 1553B bus, to
the TIE. Selected set of packets are formatted into CCSDS interleave
depth 1 VCDUs and subsequently CADUs for real-time transmission, via
S-band, at 1.024 kbps or 4.096 kbps to TDRSS, or 16.384 kbps directly to
the ground stations. A fill CADU is transmitted to keep the link to
ground active when no packets are available for transmission to the
ground. The spacecraft outputs continuous fill CADUs, if a real-time
CADU is not available for the return link. The S-band low rate CADU is
256 octets in length. The application of the CCSDS protocol for the
S-band standard telemetry CADU is shown in Figure 5.2.1-1.

############################### 5.2.2 X-band Real-time Downlink

The X-band section of the PM-1 (Aqua) S/C communications provides the
real-time transmission of instrument science, instrument engineering,
instrument housekeeping, and spacecraft housekeeping data to the ground
systems via Direct Broadcast to any ground system with the capability to
receive the data.

Instrument science and engineering data is transmitted to the FMU via
high speed Transparent Asynchronous Transmitter/Receiver Interface
(TAXI) (from AIRS and MODIS), a balanced differential serial/digital
data interface (AMSR-E) or via an RT-RT transfer on the 1553 bus from
the other instruments or the ISC (HSB, AMSR-E). Instrument and
spacecraft H/K data are sent to the FMU via the primary 1553 Bus. The
FMU formats the data into Multiplexing Protocol Data Units (M_PDUs),
processes the M_PDUs, formats VCDUs, generates Reed Solomon code, adds
the 32-bit sync code, and generates CADUs. The CADU is sent to the
X-band communication equipment for transmission at 15 Mbps to the ground
broadcast receiving system, or to the SSR for storage and subsequent
playback.

![](media/image4.wmf){width="6.49375in" height="6.270138888888889in"}

[]{#__RefHeading___Toc467303624 .anchor}Figure 5.2.1-1. S‑band CADU for
S/C and Instrument Housekeeping Telemetry

The X-band CADU is identical in structure for both H/K and science and
engineering data. The Virtual Channel Identifier distinguishes the CADU
as either a H/K or an individual instrument science or engineering CADU.
The X-band CADU utilizes interleave depth 4, the CADU length is 1024
octets. The application of the CCSDS protocol for the high-rate X-band
CADU is shown in Figure 5.2.2-1.

![](media/image5.wmf){width="6.499305555555556in"
height="6.499305555555556in"}

[]{#__RefHeading___Toc467303625 .anchor}Figure 5.2.2-1. X-band CADU for
Science, Engineering and Housekeeping Data

############################### 5.2.3 S-band Playback 

Packetized H/K data destined for storage is processed by the TIE into
VCDUs. The CTC routes the data from the TIE to the FMU via an RT-to-RT
transfer on the Primary 1553 Data Bus. The FMU sends the VCDUs to the
SSR where they are stored in Bypass mode to a specific H/K storage
partition. On playback request, the FMU/SSR retrieves VCDUs from the H/K
storage partition in the SSR. The VCDUs are passed on to the TIE which
performs Reed-Solomon (R-S) encoding to create Coded Virtual Channel
Data Units (CVCDU). The TIE forms the CVCDU into a Channel Access Data
Unit (CADU), and finally convolutionally encodes the CADU as it is
passed on to the S-band Transponder where it is downlinked to the ground
at 524.288 kbps, simultaneously with the 16.384 kbps real-time H/K data.
When no S-band playback data is available, the TIE will generate fill
CADUs for downlink at 524.288 Kbps.

############################### 5.2.4 X-band Playback

All spacecraft and instrument H/K packets and instrument science and
engineering packets that are sent to the FMU are formatted into R-S
interleave depth 4 X-band CADUs, and passed on to the SSR for storage.
Upon playback request, the X-band CADUs are retrieved from the SSR and
passed on to the X-band transmitter for DP at 150 Mbps to a PGS.

##################### 5.3 TELEMETRY DATA STRUCTURE

############################### 5.3.1 Multiplexing Protocol Data Unit (M_PDU)

The TIE and the FMU generate M_PDUs. Packet lengths are variable and can
be longer or shorter than the CADU data field, allowing multiple packets
per CADU or multiple CADUs per packet. The M_PDU data structure is used
to locate the start of a packet in the CADU and allows the insertion of
variable length packets into fixed length CADUs.

The M_PDU consists of a Packet Zone in which the CCSDS packets are
compiled and a header that points to the first Packet Primary Header in
the Packet Zone. The length of the M_PDU is fixed based on the Virtual
Channel.

The S-band M_PDU is shown in Figure 5.2.1-1, the X-band M_PDU is shown
in Figure 5.2.2-1.

######################################### 5.3.1.1 M_PDU Header

The M_PDU header contains a 5-bit spare field and an 11-bit First Header
Pointer.

################################################### 5.3.1.1.1 Spare Bits 

The first five bits of the M_PDU header are unassigned and shall be set
to "00000"".

################################################### 5.3.1.1.2 First Header Pointer 

Variable length packets are multiplexed into the VCDU via the use of an
M_PDU. The last 11 bits of the M_PDU header shall provide a binary
count, "P" (modulo 2048), which when incremented by 1, shall point to
the first byte of the first complete packet header in the M_PDU.

Per CCSDS, the count "P" is required to be expressed as:

P = (Number of the octets) -- 1

The M_PDU first header pointer shall be set to all 'ones' (1s) if no
packet header resides within the M_PDU. If the first packet header in
the M_PDU is a partial header (packet header split between two M_PDUs),
the first header pointer in that M_PDU shall be set to indicate the
start of this packet header. If any packet header is split between two
M_PDUs (x) and (x+1) on that virtual channel, the first header pointer
in M_PDU (x+1) ignores the remainder of the split packet header, and
shall only be set to indicate the start of any subsequent new CCSDS
packet header within M_PDU (x+1).

################################################### 5.3.1.1.3 M_PDU Packet Zone

Packets of data shall be placed end-to-end in the Packet Zone. The
beginning of the Packet Zone is not necessarily the beginning of a
packet, since it will often be a continuation from a packet from the
previous M_PDU.

######################################### 5.3.1.2 Fill Packets

Fill packets may be used as required to limit the data storage time on
board, or to complete an M_PDU data zone. A fill packet is identified by
its APID field (all 1's), Packet Sequence Count (all 0's), and its data
field must contain a minimum of 1 byte of fill data (all 0's).

################################################### 5.3.1.2.1 S-band Fill Packets

The TIE will not generate S-band fill packets.

################################################### 5.3.1.2.2 X-band M_PDU Fill Packets

The S/C shall create a fill packet to complete the M_PDU data zone. The
format for the X-band Fill Packet is shown in Figure 5.3.1.2.2-1.

![](media/image6.wmf){width="6.194444444444445in"
height="3.611111111111111in"}

[]{#__RefHeading___Toc467303626 .anchor}Figure 5.3.1.2.2-1. X-Band Fill
Packet

############################### 5.3.2 Coded Virtual Channel Data Unit

Section 5 of the CCSDS 701.0-B-2 describes the VCDU Format. The
following is the PM-1 (Aqua) spacecraft implementation. A Coded Virtual
Channel Data Unit (CVCDU) consists of a CVCDU primary header, a CVCDU
Data Unit Zone, and a block of Reed-Solomon check symbols.

The CVCDU structure for S-band telemetry (H/K telemetry, low-rate
science, and diagnostic/dump) data is shown in Figure 5.2.1-1. The
X-band CVCDU is shown in Figure 5.2.2-1. The S-band telemetry CVCDU has
the four octet CLCW, the X-band CVCDU does not.

######################################### 5.3.2.1 CVCDU Primary Header

The PM-1 (Aqua) S/C CVCDU Primary Header is shown in Figure 5.3.2.1-1.

> ![](media/image7.wmf){width="5.916666666666667in"
> height="4.041666666666667in"}

[]{#__RefHeading___Toc467303627 .anchor}Figure 5.3.2.1-1. CVCDU Primary
Header

######################################### 5.3.2.2 CVCDU Data Unit Zone

The CVCDU Data Unit Zone contains the M_PDU. The length of the S-band
CVCDU data zone is 220 octets and the length of the X-band CVCDU data
zone is 892 octets.

################################################### 5.3.2.2.1 Operational Control Field

The 4 octet Operational Control Field shall be used for the CLCW. The
CLCW (reference this ICD, section 4.1.4.1) is only utilized with the
S-band downlink. The Operational Control Field will be set to
80000000~16~ when no CLCW is present.

################################################### 5.3.2.2.2 Command Link Control Word

For each open virtual channel (i.e., VCID 0 and 1), there will be an
assigned CLCW.

################################################### 5.3.2.2.3 Reed‑Solomon Check Symbols

The Reed-Solomon Check Symbols are the final bits in the CVCDU and are
generated according to CCSDS 101.0-B-3, Recommendation For Space Data
Systems Standards; Telemetry Channel Coding. There will be 32 check
symbols for every 223 symbols of preceding data in the CVCDU. For the
X-band data (interleave depth = 4), there are 128 octets of check
symbols and for the S-band telemetry data, (interleave depth = 1), there
are 32 octets of check symbols.

############################### 5.3.3 Channel Access Data Unit

A fixed 32 bit pattern sync pattern represented in hexadecimal notation
as: lACFFClD~16~, shall be added to the front of each VCDU to create a
Channel Access Data Unit (CADU). S-band and X-band CADUs are shown in
Figures 5.2.1-1 and 5.2.2-1.

######################################### 5.3.3.1 Fill CADUs - S-band

The spacecraft outputs continuous data CADUs. If a CADU is not available
for the return link, the TIE will generate and transmit fill CADUs in
both GN and TDRSS modes. The VCDU Decommutation Function (ground system)
for the Fill Removal Function shall recognize "Fill"" VCDUs by their
unique VCID value and discard them.

################################################### 5.3.3.1.1 GN Mode Format - LRC

In GN Mode, when no real-time data is available at VCDU release time,
the TIE I-Channel (LRC for Transponder Channel 1) interface will
generate a "Fill" VCDU as shown in Figure 5.3.3.1.1-1.

+--------+---+----+----+----------+-----+----+------------+--------+
| Sync   | V | SC | VC | Seq      | Rep | S  | VCDU\      | R-S    |
|        | e | ID | ID | Count    | lay | pa | Data Zone  | Check  |
| 1ACFFC | r |    |    |          |     | re |            | S      |
| 1D~16~ | . | 9A | 3F | Monot    | 0   |    | Fill       | ymbols |
|        |   | ~1 | ~1 | onically | ~2~ | 0  | Pattern    |        |
|        | 0 | 6~ | 6~ | in       |     | ~1 |            | 32     |
|        | 1 |    |    | creasing |     | 6~ | 214        | octets |
|        | ~ |    |    | to 2^24^ |     |    | oct        |        |
|        | 2 |    |    |          |     |    | ets=11~16~ |        |
|        | ~ |    |    |          |     |    |            |        |
+--------+---+----+----+----------+-----+----+------------+--------+

[]{#__RefHeading___Toc467303628 .anchor}Figure 5.3.3.1.1-1. "Fill"
CADU - GN Mode - LRC

################################################### 5.3.3.1.2 GN Mode Format - HRC

In GN Mode, when no playback data is available at VCDU release time, the
TIE Q-Channel (HRC for Transponder Channel 2) interface will generate a
"Fill" VCDU as shown in Figure 5.3.3.1.2-1.

+--------+---+----+----+-----------+-----+----+-----------+--------+
| Sync   | V | SC | VC | Seq Count | Rep | S  | VCDU\     | R-S    |
|        | e | ID | ID |           | lay | pa | Data Zone | Check  |
| 1ACFFC | r |    |    | Mono      |     | re |           | S      |
| 1D~16~ | . | 9A | 3F | tonically | 0   |    | Fill      | ymbols |
|        |   | ~1 | ~1 | i         | ~2~ | 0  | Pattern   |        |
|        | 0 | 6~ | 6~ | ncreasing |     | ~1 |           | 32     |
|        | 1 |    |    | to 2^24^  |     | 6~ | 214       | octets |
|        | ~ |    |    |           |     |    | octe      |        |
|        | 2 |    |    |           |     |    | ts=A5~16~ |        |
|        | ~ |    |    |           |     |    |           |        |
+--------+---+----+----+-----------+-----+----+-----------+--------+

[]{#__RefHeading___Toc467303629 .anchor}Figure 5.3.3.1.2-1. "Fill"
CADU - GN Mode - HRC and TDRSS Mode

################################################### 5.3.3.1.3 TDRSS Mode Format

In TDRSS Mode, when no real-time data is available at VCDU release time,
the TIE I-Channel (Transponder Channel 1) interface and the TIE
Q-Channel (Transponder Channel 2) will generate a "Fill" VCDU as shown
in Figure 5.3.3.1.2-1.

################################################### 5.3.3.1.4 FMU/SSR (X-band) Fill CADU

The FMU/SSR shall provide fill CADUs as required to maintain a constant
flow of CADU sync headers and data transitions to facilitate maintenance
of modulator link synchronization.

The VCDU fill pattern will be "7878~16~" and distributed bit wise
starting with "Q" so that,

I channel: 11 00 11 00 .....

Q channel: 01 10 01 10.....

################################################### 5.3.3.1.5 Fill CADU Definition

The definition of the VCDU pattern for fill CADUs shall be as specified
in CCSDS 701.0-B-2. The pattern is shown in Figure 5.3.3.1.5-1. A CADU
is designated as a "fill" CADU when:

> 1\. The VCID contains the fixed fill pattern of "all ones" in the VCDU
> data unit zone and are non-sequenced.
>
> 2\. The MPDU Header and Data Zone are replaced with hexadecimal 7878.
>
> 3\. The Reed-Solomon check symbols form the appropriate code for the
> VCDU header and 7878 VCDU data zone.

  ------------ --------- --------- ------ ------- -------- ------- ------------ --------------
  Sync         Version   SCID      VCID   VCDU    Replay   Spare   Project      Reed-Solomon
                                          Count                    Specified    Check Symbols
                                                                   fill pattern 

  32 bits      2 bits    8 bits    6 bits 24 bits 1 bit    7 bits  886 bytes    128 bytes

  (1ACFFC1D)   01        Our       All    All 0's 0        All 0's 7878         Correct R-S
                         pattern   1's                                          code bits
  ------------ --------- --------- ------ ------- -------- ------- ------------ --------------

[]{#__RefHeading___Toc467303630 .anchor}

Figure 5.3.3.1.5-1. X-band Fill CADU

############################### 5.3.4 Data Randomization

To ensure adequate bit transition density for the X-band data, a random
sequence will be exclusive ORed with each bit of the CADU, exclusive of
the Synchronization Marker. The random sequence will be generated using
the following polynomial: h (x) = x^8^ + x^7^ + x^5^ + x^3^ + 1 in
accordance with the CCSDS Recommendation (Paragraph 5.4.9.1.2.5 of
Reference Document 8 in 2.2.1). This randomization function will be on
for X-band DB and DP telemetry by default, but can be commanded off if
desired.

S-band telemetry also has on/off commandable CCSDS randomization. The
default configuration at launch is as follows: S-band GN mode telemetry
is randomized, but S-band SN mode telemetry is not randomized.

##################### 

##################### 5.4 SUROM/TIE TELEMETRY

############################### 5.4.1 SUROM Telemetry

In order for the SUROM to provide the same telemetry service regardless
of the interface (LSIO or 1553B) through which the commands are
received, telemetry are output simultaneously to the LSIO and 1553B.

######################################### 5.4.1.1 SUROM Telemetry Packet Format

SUROM provides Version-1 CCSDS packets to the TIE via both LSIO and
1553B bus using the same packet format shown in Figure 5.4.1.1-1, the
SUROM/TIE Telemetry Packet Format, which has no Secondary Header.

[]{#__RefHeading___Toc467303631 .anchor}Figure 5.4.1.1-1. SUROM/TIE
Telemetry Packet Format

######################################### 5.4.1.2 SUROM SOH Telemetry

SUROM State of Health (SOH) packets are fixed length 80 words including
memory dump telemetry. SUROM SOH telemetry defines the condition of each
controller and is downlinked continuously at 1‑second intervals and
every time a ground command is executed, SUROM telemetry is updated.

For detailed description of SUROM telemetry, reference Section 2.2.3,
Document 1.

######################################### 5.4.1.3 SRAM Memory Dump

Upon receipt of the Memory Dump command, 32 words of SRAM as defined by
the physical page and offset will be placed in the SUROM telemetry from
word 32 through word 63. These data content will not change until it
receives another Memory Dump command.

######################################### 5.4.1.4 EEPROM Memory Dump

The telemetry location of EEPROM Memory Dump is the same as SRAM memory
dump. Upon receipt of the EEPROM dump command, 32 words of EEPROM as
defined by the physical page and offset will be placed in the SUROM
telemetry from word 32 through word 63.

############################### 5.4.2 TIE Status Packet

Once per second the TIE internally generates a configuration and status
packet formatted in accordance with Figure 5.4.1.1-1, and referenced to
the CUC Time of Day Clock one-second tick. The packet size will be a
fixed 38 octets. The TIE packet does not have the Secondary Header
Field.

######################################### 5.4.2.1 TIE Data Field

The TIE packet data field will contain a fixed 32 octets of
configuration and status data as shown in Figure 5.4.2.1-1.

  --------- --------------- ------------ ----- ----------- -------- -------- ------------
            MSB                                                              LSB

  Word 1    Bilevel Word 1                                                   

  Word 2    Bilevel Word 2                                                   

  Word 3    Relay Word 1                                                     

  Word 4    Relay Word 2                                                     

  Word 5    Critical                           Accepted                      
            Transfer Frame                     Codeblock                     
            Count                              Count                         

  Word 6    Fixed at 0s                                             TIE      
                                                                    Enable   
                                                                    Status   

  Word 7    I Channel                                                        
            Configuration                                                    

  Word 8    I Channel Rate                                                   
            Setting (Most                                                    
            Significant                                                      
            Word)                                                            

  Word 9    I Channel Rate                                                   
            Setting (Least                                                   
            Significant                                                      
            Word)                                                            

  Word 10   Q Channel                                                        
            Configuration                                                    

  Word 11   Q Channel Rate                                                   
            Setting (Most                                                    
            Significant                                                      
            Word)                                                            

  Word 12   Q Channel Rate                                                   
            Setting (Least                                                   
            Significant                                                      
            Word)                                                            

  Word 13   1553B BCRT                                                       
            Control                                                          
            Register                                                         

  Word 14   1553B BCRT                                                       
            Status Register                                                  

  Word 15   1553B BCRT RT                                                    
            Address                                                          
            Register                                                         

  Word 16   TIE Firmware                                                     
            Processing                                                       
            Error Status                                                     
            Register                                                         
  --------- --------------- ------------ ----- ----------- -------- -------- ------------

[]{#__RefHeading___Toc467303632 .anchor}Figure 5.4.2.1-1. TIE Packet
Data Field Format

##################### 5.5 PM-1 (AQUA) spacecraft Bus Telemetry

The PM-1 (Aqua) Spacecraft bus telemetry consists of health and status
telemetry and memory dump data. Raw spacecraft data is encapsulated into
CCSDS version 1 packets. Each telemetry packet has an associated
telemetry Packet List (Figure 5.5-1) and telemetry Format Table (Figure
5.3-2) that determine the contents of the data field of the packet. A
standard telemetry format table contains up to 128 entries. Table 5.5-1
defines the standard telemetry format table fields. Table 5.5-2 defines
the Telemetry Access Types, which explains how the data are retrieved,
processed and output. Packet sizes include the CCSDS headers. Each
packet's telemetry format table can be loaded from the ground and
includes the packet's APID as well as a memory dump indicator. The
length of the telemetry packet and the rate of telemetry packet
generation are controlled via an active packet list on each controller.
The active packet list can be loaded from the ground and includes the
packet's internal identifier (not APID). The spacecraft supports a
maximum of 16 packets per controller. Each packet may be up to 256
octets in size with the actual packet size determined by the
corresponding telemetry format table. There are up to 4 packet lists per
controller and each packet list can select from any of the 16 format
tables per CTC (on-line and off-line), PC, and ISC. The GNCC has 20
format tables and 5 packet lists to accommodate the Ground Based
Attitude Determination (GBAD) packets. However, only one packet list on
each of the four controllers is active at any given time and is
selectable via ground command. The ground system may change the entries
in any of the telemetry format tables and packet lists via memory loads.

<table style="width:100%;">
<colgroup>
<col style="width: 10%" />
<col style="width: 6%" />
<col style="width: 4%" />
<col style="width: 4%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 4%" />
<col style="width: 4%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 7%" />
</colgroup>
<tbody>
<tr class="odd">
<td></td>
<td></td>
<td>0</td>
<td>1</td>
<td>2</td>
<td>3</td>
<td>4</td>
<td>5</td>
<td>6</td>
<td>7</td>
<td>8</td>
<td>9</td>
<td>10</td>
<td>11</td>
<td>12</td>
<td>13</td>
<td>14</td>
<td>15</td>
<td></td>
</tr>
<tr class="even">
<td rowspan="7"><p>Pkt<br />
List<br />
# 0<br />
<strong>…</strong></p>
<p># 3</p></td>
<td><strong>0</strong></td>
<td colspan="16">Format Table Number</td>
<td rowspan="3">Pkt<br />
# 0</td>
</tr>
<tr class="odd">
<td><strong>1</strong></td>
<td colspan="16">Sample Period</td>
</tr>
<tr class="even">
<td><strong>2</strong></td>
<td colspan="16">Slot Number</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="16"><p>…</p>
<p>…</p></td>
<td></td>
</tr>
<tr class="even">
<td></td>
<td colspan="16">Format Table Number</td>
<td rowspan="3"><p>Pkt</p>
<p># 15</p></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="16">Sample Period</td>
</tr>
<tr class="even">
<td><strong>191</strong></td>
<td colspan="16">Slot Number</td>
</tr>
<tr class="odd">
<td rowspan="7">Pkt<br />
List<br />
# 4<br />
(GNCC Only)</td>
<td><strong>192</strong></td>
<td colspan="16">Format Table Number</td>
<td rowspan="3">Pkt<br />
# 0</td>
</tr>
<tr class="even">
<td></td>
<td colspan="16">Sample Period</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="16">Slot Number</td>
</tr>
<tr class="even">
<td></td>
<td colspan="16"><p>…</p>
<p>…</p></td>
<td></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="16">Format Table Number</td>
<td rowspan="3">Pkt<br />
# 19</td>
</tr>
<tr class="even">
<td></td>
<td colspan="16">Sample Period</td>
</tr>
<tr class="odd">
<td><strong>251</strong></td>
<td colspan="16">Slot Number</td>
</tr>
</tbody>
</table>

[]{#__RefHeading___Toc467303633 .anchor}Figure 5.5-1. Telemetry Packet
List

<table>
<colgroup>
<col style="width: 10%" />
<col style="width: 7%" />
<col style="width: 6%" />
<col style="width: 5%" />
<col style="width: 4%" />
<col style="width: 4%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 4%" />
<col style="width: 4%" />
<col style="width: 4%" />
<col style="width: 4%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 8%" />
</colgroup>
<tbody>
<tr class="odd">
<td></td>
<td></td>
<td>0</td>
<td>1</td>
<td>2</td>
<td>3</td>
<td>4</td>
<td>5</td>
<td>6</td>
<td>7</td>
<td>8</td>
<td>9</td>
<td>10</td>
<td>11</td>
<td>12</td>
<td>13</td>
<td>14</td>
<td>15</td>
<td></td>
</tr>
<tr class="even">
<td rowspan="10"><p>fmt_tbl number<br />
0</p>
<p>…</p>
<p>15</p></td>
<td>0</td>
<td>mdf</td>
<td colspan="2">spare</td>
<td colspan="13">number of entries (*)</td>
<td></td>
</tr>
<tr class="odd">
<td>1</td>
<td colspan="5">spare</td>
<td colspan="11">APID</td>
<td></td>
</tr>
<tr class="even">
<td>2</td>
<td colspan="9">access type (*)</td>
<td colspan="7">start addr msb (*)</td>
<td rowspan="2">Entry #1</td>
</tr>
<tr class="odd">
<td>3</td>
<td colspan="16">start addr lsb (*)</td>
</tr>
<tr class="even">
<td>4</td>
<td colspan="9">access type (*)</td>
<td colspan="7">start addr msb (*)</td>
<td rowspan="2">Entry #2</td>
</tr>
<tr class="odd">
<td>5</td>
<td colspan="16">Start addr lsb (*)</td>
</tr>
<tr class="even">
<td rowspan="2"></td>
<td colspan="16" rowspan="2">…</td>
<td></td>
</tr>
<tr class="odd">
<td></td>
</tr>
<tr class="even">
<td></td>
<td colspan="9">access type (*)</td>
<td colspan="7">start addr msb (*)</td>
<td rowspan="2">Entry #128</td>
</tr>
<tr class="odd">
<td>4127</td>
<td colspan="16">start addr lsb (*)</td>
</tr>
<tr class="even">
<td rowspan="10"><p>fmt_tbl number<br />
16</p>
<p>…</p>
<p>19<br />
(GNCC only)</p></td>
<td>4128</td>
<td>mdf</td>
<td colspan="2">spare</td>
<td colspan="13">number of entries (*)</td>
<td></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="5">spare</td>
<td colspan="11">APID</td>
<td></td>
</tr>
<tr class="even">
<td></td>
<td colspan="9">access type (*)</td>
<td colspan="7">start addr msb (*)</td>
<td rowspan="2">Entry #1</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="16">start addr lsb (*)</td>
</tr>
<tr class="even">
<td></td>
<td colspan="9">access type (*)</td>
<td colspan="7">start addr msb (*)</td>
<td rowspan="2">Entry #2</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="16">start addr lsb (*)</td>
</tr>
<tr class="even">
<td rowspan="2"></td>
<td colspan="16" rowspan="2">…</td>
<td></td>
</tr>
<tr class="odd">
<td></td>
</tr>
<tr class="even">
<td></td>
<td colspan="9">access type (*)</td>
<td colspan="7">start addr msb (*)</td>
<td rowspan="2">Entry #128</td>
</tr>
<tr class="odd">
<td>5159</td>
<td colspan="16">start addr lsb (*)</td>
</tr>
</tbody>
</table>

[]{#__RefHeading___Toc467303634 .anchor}Figure 5.5-2. Packet Format
Tables for Standard Telemetry

[]{#__RefHeading___Toc519937823 .anchor}Table 5.5-1. Standard Telemetry
Format Table Fields Defined

+---------------+------------------------------------------------------+
| Field         | Description                                          |
+---------------+------------------------------------------------------+
| Memory Dump   | Indicates whether the Telemetry Format Table is a    |
| Flag          | standard format table or a memory dump format table. |
|               | The valid range is 0 - 1.                            |
|               |                                                      |
|               | 0 = Standard 1 = Memory Dump                         |
+---------------+------------------------------------------------------+
| Application   | Contains the packet's APID. The defined range per    |
| Process ID    | controller is allocated in Table B-2, Appendix B     |
+---------------+------------------------------------------------------+
| Memory Dump   | Contains the region requests for memory dumps.       |
| Requests      |                                                      |
|               | Contains the starting physical address of the memory |
| Region Start  | dump region. This field is only applicable to memory |
| Address       | dump format tables. The valid range is as follows:   |
|               |                                                      |
| Region Word   | CTC RAM: 100000H - 1BFFFFH\                          |
| Count         | CTC EEPROM: 200000H - 27FFFFH\                       |
|               | PC, GNCC, and ISC RAM: 100000H - 13FFFFH             |
|               |                                                      |
|               | Contains the number of words to dump from the memory |
|               | dump region. This field is only applicable to memory |
|               | dump format tables. The valid range is 1 - 512.      |
+---------------+------------------------------------------------------+
| Standard      | Contains the data requests for collecting spacecraft |
| Telemetry     | telemetry data. This field is only applicable to     |
| Requests      | standard format tables.                              |
|               |                                                      |
| Data Address  | This sub-field contains the physical address of the  |
|               | data to be read. The valid range is as follows:      |
| Access Type   |                                                      |
|               | CTC RAM: 100000H - 1BFFFFH\                          |
|               | PC, GNCC, and ISC RAM: 100000H - 13FFFFH             |
|               |                                                      |
|               | This sub-field defines the number of octets to read  |
|               | from the specified Data Address. The valid range is  |
|               | 0 - 8.                                               |
|               |                                                      |
|               | 0 = MSH 1 = LSH 2 = 16-bit Wd\                       |
|               | 3 = 2 16-bit Wds 4 = Unused 5 = 24-bit Float\        |
|               | 6 = 32-bit Float 7 = 40-bit Float 8 = 48-bit Float   |
+---------------+------------------------------------------------------+

> **Table 5.5-2. Telemetry Access Types**

+----------------+------------+-------------------------------+--------+
| Access\        | Words to   | Processing                    | Bytes  |
| Type           | Retrieve   |                               | to     |
|                |            |                               | Output |
+----------------+------------+-------------------------------+--------+
| MSH\*\*        | 1          | Extract the 8 MSBs            | 1      |
+----------------+------------+-------------------------------+--------+
| LSH\*\*        | 1          | Extract the 8 LSBs            | 1      |
+----------------+------------+-------------------------------+--------+
| 16-bit word\*  | 1          | None                          | 2      |
+----------------+------------+-------------------------------+--------+
| 2 16-bit       | 2          | None                          | 4      |
| words\*        |            |                               |        |
+----------------+------------+-------------------------------+--------+
|                |            |                               |        |
+----------------+------------+-------------------------------+--------+
| 24-bit         | 2          | Bytes 1-2: word 1\            | 3      |
| float\*\*      |            | (16 MSBs of mantissa)         |        |
|                |            |                               |        |
|                |            | Byte 3: 8 LSBs of word 2\     |        |
|                |            | (exponent)                    |        |
+----------------+------------+-------------------------------+--------+
| 32-bit float\* | 2          | None                          | 4      |
+----------------+------------+-------------------------------+--------+
| 40-bit         | 3          | Bytes 1-4: words 1-2\         | 5      |
| float\*\*      |            | (24 MSBs of mantissa and      |        |
|                |            | entire exponent)              |        |
|                |            |                               |        |
|                |            | Byte 5: 8 msbs of word 3\     |        |
|                |            | (next 8 MSBS of mantissa)     |        |
+----------------+------------+-------------------------------+--------+
| 48-bit float\* | 3          | None                          | 6      |
+----------------+------------+-------------------------------+--------+

> Note:
>
> \* Access types "16-bit word," "two 16-bit words", "32-bit float", and
> "48-bit float" correspond respectively to "single precision fixed
> point", "double precision fixed point", "32-bit floating point", and
> "48-bit extended precision floating point" data types defined in the
> 1750A specification (see Section 2.2.1, document \# 14).
>
> \*\* Access types "MSH", "LSH", "24-bit float", and "40-bit float" do
> not correspond to any data types defined in the 1750A specification
> (see Section 2.2.1, document \# 14). The FSW provides custom
> processing for these access types.

############################### 5.5.1 Spacecraft Bus Housekeeping Telemetry Packet Format

The PM-1 (Aqua) S/C Bus housekeeping telemetry packet consists of two
major components; the Primary Header and the Data Zone as defined in
Figure 5.5.1-1.

######################################### 5.5.1.1 APIDS

Tables B-2, B-3 and B-4 of Appendix B list the APID assignments for the
S-band downlink. Table B-5 of Appendix B lists the APID assignments for
the X-band downlink.

[]{#__RefHeading___Toc467303635 .anchor}Figure 5.5.1-1. Spacecraft Bus
Telemetry Packet Format

############################### 5.5.2 S/C Bus Memory Dump

The Memory Dump function provides a method for the ground to dump
selected regions of any prime or redundant C&DH controllers (PC, GNCC,
CTC, ISC) memory while the flight software is running. A standard
telemetry format table, Figure 5.5.2-1, will contain a memory dump flag,
a physical address and a word count indicating the location of the
region of memory and the number of words to be dumped. Memory dumps are
enabled/disabled via ground commands. Memory dumps are automatically
disabled when all the regions specified in the memory dump format table
have been dumped.

On the CTC, memory dumps are the means by which the contents of the
EEPROMs can be read. Therefore, the EEPROMS must be powered on by ground
command prior to initiating a dump from them. Upon completion of the
EEPROM dump, they will be automatically powered off by the CTC telemetry
processing function.

<table>
<colgroup>
<col style="width: 10%" />
<col style="width: 7%" />
<col style="width: 6%" />
<col style="width: 5%" />
<col style="width: 4%" />
<col style="width: 4%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 4%" />
<col style="width: 4%" />
<col style="width: 4%" />
<col style="width: 4%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 8%" />
</colgroup>
<tbody>
<tr class="odd">
<td></td>
<td></td>
<td>0</td>
<td>1</td>
<td>2</td>
<td>3</td>
<td>4</td>
<td>5</td>
<td>6</td>
<td>7</td>
<td>8</td>
<td>9</td>
<td>10</td>
<td>11</td>
<td>12</td>
<td>13</td>
<td>14</td>
<td>15</td>
<td></td>
</tr>
<tr class="even">
<td rowspan="10"><p>fmt_tbl number<br />
0</p>
<p>…</p>
<p>15</p></td>
<td>0</td>
<td>mdf</td>
<td colspan="2">spare</td>
<td colspan="13">number of entries (*)</td>
<td></td>
</tr>
<tr class="odd">
<td>1</td>
<td colspan="5">spare</td>
<td colspan="11">APID</td>
<td></td>
</tr>
<tr class="even">
<td>2</td>
<td colspan="9">M words</td>
<td colspan="7">start addr msb (*)</td>
<td rowspan="2">Entry #1</td>
</tr>
<tr class="odd">
<td>3</td>
<td colspan="16">start addr lsb (*)</td>
</tr>
<tr class="even">
<td>4</td>
<td colspan="9">M words</td>
<td colspan="7">start addr msb (*)</td>
<td rowspan="2">Entry #2</td>
</tr>
<tr class="odd">
<td>5</td>
<td colspan="16">Start addr lsb (*)</td>
</tr>
<tr class="even">
<td rowspan="2"></td>
<td colspan="16" rowspan="2">…</td>
<td></td>
</tr>
<tr class="odd">
<td></td>
</tr>
<tr class="even">
<td></td>
<td colspan="9">M words</td>
<td colspan="7">start addr msb (*)</td>
<td rowspan="2">Entry #128</td>
</tr>
<tr class="odd">
<td>4127</td>
<td colspan="16">start addr lsb (*)</td>
</tr>
<tr class="even">
<td rowspan="10"><p>fmt_tbl number<br />
16</p>
<p>…</p>
<p>19<br />
(GNCC only)</p></td>
<td>4128</td>
<td>mdf</td>
<td colspan="2">spare</td>
<td colspan="13">number of entries (*)</td>
<td></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="5">spare</td>
<td colspan="11">APID</td>
<td></td>
</tr>
<tr class="even">
<td></td>
<td colspan="9">M words</td>
<td colspan="7">start addr msb (*)</td>
<td rowspan="2">Entry #1</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="16">start addr lsb (*)</td>
</tr>
<tr class="even">
<td></td>
<td colspan="9">M words</td>
<td colspan="7">start addr msb (*)</td>
<td rowspan="2">Entry #2</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="16">start addr lsb (*)</td>
</tr>
<tr class="even">
<td rowspan="2"></td>
<td colspan="16" rowspan="2">…</td>
<td></td>
</tr>
<tr class="odd">
<td></td>
</tr>
<tr class="even">
<td></td>
<td colspan="9">M words</td>
<td colspan="7">start addr msb (*)</td>
<td rowspan="2">Entry #128</td>
</tr>
<tr class="odd">
<td>5159</td>
<td colspan="16">start addr lsb (*)</td>
</tr>
</tbody>
</table>

[]{#refheading___toc467303636 .anchor}Figure 5.5.2-1. Packet Format
Tables for Memory Dump

######################################### 5.5.2.1 S/C Bus Memory Dump Packet Format

Spacecraft Bus Telemetry Packet (Figure 5.5.1-1) is the format used for
S/C bus memory dump. All the regions specified by the memory dump format
table will be contained in several consecutive packets per APID. All
packets, except for the last one for a region, will be 256 octets in
length. The last packet will contain the remaining data required to
complete the dump. The first 32 bits of each packet's Data Field
contains the starting address of the memory dump data in the packet.

######################################### 5.5.2.2 Log Management

The PM-1 (Aqua) Spacecraft Flight Software maintains Two Fault Logs
(Level 1 Faults and Contingency Faults), Activity Log, and a Telemetry
Monitor (TMON) Log and are described in subsequent paragraphs.

################################################### 5.5.2.2.1 Fault Logs 

The PM-1 (Aqua) spacecraft Flight Software maintains a fault log to
provide a history of faults that have occurred and to provide the ground
with visibility of how the spacecraft is functioning as well as helping
the ground identify why a fault occurred. Each controller maintains two
fault logs. A Level 1 Fault Log contains all of the level 1 faults and
the Contingency Fault Log contains all of the level 2 and 3 faults. The
C&DH subsystem flight software executes on all controllers and is
capable of logging activities in each controller's Fault Log. Each Fault
Log holds up to 16 faults. When more than 16 faults are logged, the last
entry in the Fault Log is overwritten until the Fault Log is cleared by
the ground via a ground command. Each Fault Log contains an Overflow
Flag indicating the Fault Log has filled up and the last entry in the
log is being overwritten. The Overflow Flag remains set until the ground
clears the Fault Log. The Fault Logs are inserted into the data zone of
the Memory Dump Packet and sent to ground. The format of the Fault Logs
is shown in Figure 5.5.2.2.1-1.

[]{#refheading___toc467303638 .anchor}Figure 5.5.2.2.1-1. Fault Log
Format

################################################### 5.5.2.2.2 Activity Logs

The flight software maintains Activity Logs to provide a history of
significant activities that have been initiated by the flight software.
Each controller maintains a single Activity Log. The C&DH subsystem
flight software executes on all controllers and is capable of logging
activities in each controller's Activity Log. The TMON function
maintains its own activity log.

Each Activity Log holds up to 64 activities and contains an Overflow
Flag indicating the Activity Log has filled up and that previously
logged activities are being overwritten starting at the top of the log.
The Overflow Flag remains set until the ground clears the Activity Log.

[]{#refheading___toc467303639 .anchor}Figure 5.5.2.2.2-1. Activity Log
Format

################################################### 5.5.2.2.3 TMON Log

The Telemetry Monitor (TMON) function performs limit checking on
specific data items and is capable of activating a stored command
sequence when errors are detected. Tables (Group Tables and Logic
Tables) define the data thresholds. The ground is capable of modifying
any of the TMON tables via a Memory Load operation. The TMON function
compares the collected data with the predefined limits defined in the
tables. The ground is capable of controlling what data is checked during
specific modes by enabling or inhibiting specific groups by setting the
Group Processing Flag (1 = enable). Groups can be inhibited or enabled
through a ground command or a stored command sequence. For additional
information regarding the TMON function reference Section 2.1.2,
Document 3, paragraphs 5.1.7.5.

The format of the TMON Log is shown in Figure 5.5.2.2.3-1.

[]{#__RefHeading___Toc467303640 .anchor}![](media/image8.wmf)Figure
5.5.2.2.3-1. TMON Format

############################### 5.5.3 Time Correlation Data Telemetry Format

The data items for time correlation are collected in a time correlation
data packet with an APID of 1000. The data items are shown in Table
5.5.3-1. This packet is generated at a rate dependent on the S-band
downlink rate: once every 32 seconds at 1.024 Kbps, and once every 8
seconds at 4.096 Kbps.

> **Table 5.5.3-1 Time Correlation Data Format**

  -------- ---------------------- -------------------------- ----------------------------- ----------- ----------
  **Rec\   **EPOCH Mnemonic**     **Description**            **Symbol Name**               **Symbol\   **Bits**
  ID**                                                                                     Offset**    

  5538     CDH_SS_TIEGRDARMTD1    TIE GIRD TIME @ EPOCH      bst_bc_d_1553.tie_firm_samp   0           16
                                  ARMING (WORD 1)                                                      

  5539     CDH_SS_TIEGRDARMTD2    TIE GIRD TIME @ EPOCH      bst_bc_d_1553.tie_firm_samp   1           16
                                  ARMING (WORD 2)                                                      

  5540     CDH_SS_TIEGRDARMTD3    TIE GIRD TIME @ EPOCH      bst_bc_d_1553.tie_firm_samp   2           16
                                  ARMING (WORD 3)                                                      

  5541     CDH_SS_TIEGRDARMTD4    TIE GIRD TIME @ EPOCH      bst_bc_d_1553.tie_firm_samp   3           16
                                  ARMING (WORD 4)                                                      

  5534     CDH_SS_TIEGRDEPCHTD1   TIE GIRD TIME @ TDRSS PN   bst_bc_d_1553.tie_firm_samp   4           16
                                  ALL 1S EPOCH ARRIV (W1)                                              

  5535     CDH_SS_TIEGRDEPCHTD2   TIE GIRD TIME @ TDRSS PN   bst_bc_d_1553.tie_firm_samp   5           16
                                  ALL 1S EPOCH ARRIV (W2)                                              

  5536     CDH_SS_TIEGRDEPCHTD3   TIE GIRD TIME @ TDRSS PN   bst_bc_d_1553.tie_firm_samp   6           16
                                  ALL 1S EPOCH ARRIV (W3)                                              

  5537     CDH_SS_TIEGRDEPCHTD4   TIE GIRD TIME @ TDRSS PN   bst_bc_d_1553.tie_firm_samp   7           16
                                  ALL 1S EPOCH ARRIV (W4)                                              

  19871    CDH_SS_TIEVCDUSQCTR    TIE ARM VCDU SEQUENCE      bst_bc_d_1553.tie_firm_samp   8&9         32
                                  COUNTER                                                              

  11624    CDH_SS_TIEGISARMUS     TIE GIIS TIME @ EPOCH      bst_bc_d_1553.tie_giis_samp   0           16
                                  ARMING US OF MS                                                      

  11625    CDH_SS_TIEGISARMMSL    TIE GIIS TIME @ EPOCH      bst_bc_d_1553.tie_giis_samp   1           16
                                  ARMING LSW mS                                                        

  11626    CDH_SS_TIEGISARMMSM    TIE GIIS TIME @ EPOCH      bst_bc_d_1553.tie_giis_samp   2           16
                                  ARMING MSW mS                                                        

  11627    CDH_SS_TIEGISARMDAY    TIE GIIS TIME @ EPOCH      bst_bc_d_1553.tie_giis_samp   3           16
                                  ARMING #DAYS                                                         

  5554     CDH_SS_TIEGISEPCHUS    TIE GIIS TIME @ TDRSS PN   bst_bc_d_1553.tie_giis_samp   4           16
                                  ALL 1S EPOCH ARRIV uS                                                

  5555     CDH_SS_TIEGISEPCHMSL   TIE GIIS TIME @ TDRSS PN   bst_bc_d_1553.tie_giis_samp   5           16
                                  ALL 1S EPOCH ARRIV LSW mS                                            

  5556     CDH_SS_TIEGISEPCHMSM   TIE GIIS TIME @ TDRSS PN   bst_bc_d_1553.tie_giis_samp   6           16
                                  ALL 1S EPOCH ARRIV MSW mS                                            

  5557     CDH_SS_TIEGISEPCHDAY   TIE GIIS TIME @ TDRSS PN   bst_bc_d_1553.tie_giis_samp   7           16
                                  ALL 1S EPOCH ARRIV #DAYS                                             
  -------- ---------------------- -------------------------- ----------------------------- ----------- ----------

############################### 5.5.4 Ground Based Attitude Determination Data

######################################### 5.5.4.1 GBAD Definitions

Ground Based Attitude Determination (GBAD) data is generated internal to
the GNCC controller originally for use by the Flight Dynamics Facility
ground system analysts to assess the on-board attitude determination
performance and provide high accuracy attitude fixes prior to entering
the on-board Star ID acquisition logic. However, the GBAD data has been
expanded to include many of the housekeeping data useful for science
data analysis. The GBAD data is separate from standard housekeeping
telemetry and is transmitted to the ground via X-band Direct Broadcast
and Direct Playback only, not via the S-band. An extra four format
tables and one additional packet list have been allocated to the GN&C
controller for GBAD.

The GBAD data is placed into the Telemetry Data field of a spacecraft
bus telemetry packet shown in Figure 5.5.1-1. Three GBAD packets will be
generated. One packet, identified by APID 957, will be generated every
second. The content and format of the one-second-packet data field is
shown in Table 5.5.4-1 and Figure 5.5.4-1. A second packet, identified
by APID 958, will be generated every four seconds. The content and
format of the four-second-packet data field is shown in Table 5.5.4-2
and Figure 5.5.4-2. A third packet, identified by APID 959, will be
generated every 8 seconds. The content and format of the
eight-second-packet data field is shown in Table 5.5.4-3 and Figure
5.5.4-3. The contents of the GBAD packets will generally remain fixed
once they are finalized during spacecraft integration and test. Changes
may be needed, but they will only be made if necessary, will be made in
coordination with the ground system, and will require a change to this
section of the ICD. Direct Broadcast users should contact NASA PM-1
(Aqua) EOS Operations Center for the actual GBAD format and data
description.

The GN&C mode information is located in the GNCC Status Word 2 (Table
5.5.4-4) of the Eight-Second GBAD packet.

When the GN&C mode is other than the Fine Point mode, the spacecraft
pointing accuracy do not meet the requirements for science observation,
the associated science data should be discarded. When the GN&C mode is
in Fine Point Mode, there is still no guarantee the pointing accuracy
always meets the requirements (e.g., a GN&C anomaly develops in the
Science state, pointing accuracy gradually deteriorates until some
threshold is reached, triggering transfer to a non-Science state). It is
necessary to check the S/C pointing accuracy to determine which part of
the science data are usable, and which part should be discarded.

[]{#__RefHeading___Toc519937824 .anchor}Table 5.5.4-1. One-Second GBAD
Packet Data Field Contents

+------------+-----------------------------+--------+--------+--------+
| D          | Notes                       | R      | Units  | Sa     |
| escription |                             | esolut |        | mpling |
|            |                             | ion^1^ |        | T      |
|            |                             |        |        | ime^2^ |
+------------+-----------------------------+--------+--------+--------+
| Spacecraft | The estimated spacecraft    | DPFP   | Meters | 1      |
| P          | position, calculated using  |        |        | Second |
| osition(X, | the hi-fidelity             |        |        |        |
| Y, Z)      | interpolation routine, of   |        |        |        |
|            | the spacecraft, expressed   |        |        |        |
|            | in the Earth Centered       |        |        |        |
|            | Inertial frame.             |        |        |        |
|            | (sc_position_eci)           |        |        |        |
+------------+-----------------------------+--------+--------+--------+
| Spacecraft | The estimated spacecraft    | DPFP   | Mete   | 1      |
| Velocity   | velocity, calculated using  |        | rs/sec | Second |
|            | the hi-fidelity             |        |        |        |
| (X, Y, Z)  | interpolation routine, of   |        |        |        |
|            | the spacecraft, expressed   |        |        |        |
|            | in the Earth Centered       |        |        |        |
|            | Inertial frame.             |        |        |        |
|            | (sc_velocity_eci)           |        |        |        |
+------------+-----------------------------+--------+--------+--------+
| Attitude   | The estimated Earth         | DPFP   | none   | 1      |
| Quaternion | Centered Inertial to        |        |        | Second |
| (1, 2, 3,  | Spacecraft Body frame       |        |        |        |
| 4)         | attitude quaternion of the  |        |        |        |
|            | spacecraft. (ap_q_eci2body) |        |        |        |
+------------+-----------------------------+--------+--------+--------+
| Attitude   | The estimated attitude      | SPFP   | R      | 1      |
| Body Rates | rates of the spacecraft,    |        | ad/sec | Second |
| (X, Y, Z)  | expressed in the Spacecraft |        |        |        |
|            | Body frame. (body_rates)    |        |        |        |
+------------+-----------------------------+--------+--------+--------+
| IRU Data   | word 1 -- SIRU remote       | bit-   | none   | 1      |
| Words      | terminal status word        | packed |        | Second |
| (1-7)      |                             |        | none   |        |
|            | word 2 -- SIRU data valid   | bit-   |        |        |
|            | word                        | packed | counts |        |
|            |                             |        |        |        |
|            | word 3 -- gyro A integrated | i      | counts |        |
|            | angle                       | nteger |        |        |
|            |                             |        | counts |        |
|            | word 4 -- gyro B integrated | i      |        |        |
|            | angle                       | nteger | counts |        |
|            |                             |        |        |        |
|            | word 5 -- gyro C integrated | i      | counts |        |
|            | angle                       | nteger |        |        |
|            |                             |        |        |        |
|            | word 6 -- gyro D integrated | i      |        |        |
|            | angle                       | nteger |        |        |
|            |                             |        |        |        |
|            | word 7 -- gyro integration  | i      |        |        |
|            | period                      | nteger |        |        |
|            |                             |        |        |        |
|            | (IRU_data_count)            |        |        |        |
+------------+-----------------------------+--------+--------+--------+
| Status     | Enable, on/off and          | bit-   | none   | 1      |
| Word 3     | direction bits of the       | packed |        | Second |
|            | magnetic torquer coils used |        |        |        |
|            | for spacecraft momentum     |        |        |        |
|            | unloading (Status Word 3)   |        |        |        |
+------------+-----------------------------+--------+--------+--------+
| Three-axis | The raw measurement of the  | I      | counts | 1      |
| Ma         | local magnetic field in TAM | nteger |        | Second |
| gnetometer | coordinates.                |        |        |        |
|            |                             |        |        |        |
| (primary   | (TAMcountsP, TAMcountsR)    |        |        |        |
| X, Y, Z)   |                             |        |        |        |
| (redundant |                             |        |        |        |
| X, Y, Z)   |                             |        |        |        |
+------------+-----------------------------+--------+--------+--------+
| Attitude   | The absolute time tag       | DPFP   | S      | 1      |
| Body Rates | associated with the IRU     |        | econds | Second |
| Time Tag   | data and associated body    |        |        |        |
|            | rate (body_rate_time)       |        |        |        |
+------------+-----------------------------+--------+--------+--------+

Notes:

1\) Denotes whether data is bit-packed, or expressed in integer format,
Double Precision Floating-Point (DPFP) or Single Precision Floating
Point (SPFP). The SPFP and DPFP data types are the same as the "32-bit
floating point" and "48-bit extended precision floating point" data
types defined in MIL-STD-1750A (see Section 2.2.1, Document 14).

2\) Time reference specifies the frequency at which the data is
downlinked to the ground system.

3\) The Attitude Body Rate Time Tag consists of two fields: the integer
second and the fractional second fields. The integer second is the
number of seconds elapsed since January 1, 1958. The units for both
fields are seconds and both are expressed in the DPFP format. The two
fields need to be added to obtain the total elapsed time. The time tags
are not quantized with a scale factor and an LSB.

[]{#__RefHeading___Toc467303641 .anchor}Figure 5.5.4-1. One-Second GBAD
Packet Data Field Format

[]{#__RefHeading___Toc519937825 .anchor}Table 5.5.4-2. Four-Second GBAD
Packet Data Field Contents

  ------------- ----------------------------- --------------- -------- ----------
  Description   Notes                         Resolution^1^   Units    Sampling
                                                                       Time^2^

  Earth Sensor  The raw measurements of the   Integer         counts   4 Seconds
  Outputs\      ESA detector outputs.                                  
  (1, 2, 3, 4)  (ESA1COUNTS, ESA2COUNTS,                               
                ESA3COUNTS, ESA4COUNTS)                                
  ------------- ----------------------------- --------------- -------- ----------

Notes: 1) Denotes whether data is bit-packed, or expressed in integer
format, Double Precision Floating Point (DPFP) or Single Precision
Floating Point (SPFP). The DPFP is the same as Extended Precision
Floating Point defined in Mil-Std-1750A (see Section 2.2.1, Document
14).

> 2\) Time reference specifies the frequency at which the data is
> downlinked to the ground system.

![](media/image9.wmf){width="6.497916666666667in" height="1.5625in"}

[]{#refheading___toc467303642 .anchor}Figure 5.5.4-2. Four-Second GBAD
Packet Data Field Format

[]{#__RefHeading___Toc519937826 .anchor}Table 5.5.4-3. Eight-Second GBAD
Packet Data Field Contents

+--------------+---------------------------+--------+--------+--------+
| Description  | Notes                     | R      | Units  | Sa     |
|              |                           | esolut |        | mpling |
|              |                           | ion^1^ |        | T      |
|              |                           |        |        | ime^2^ |
+--------------+---------------------------+--------+--------+--------+
| Solar        | The components of a unit  | SPFP   | none   | 8      |
| Ephemeris    | vector, calculated from   |        |        | S      |
| (X, Y, Z)    | CSS data and expressed in |        |        | econds |
|              | the Spacecraft Body       |        |        |        |
|              | Reference frame, pointing |        |        |        |
|              | in the direction of the   |        |        |        |
|              | sun. (css_sun1vec_sbf)    |        |        |        |
+--------------+---------------------------+--------+--------+--------+
| Coarse Sun   | The raw measurements of   | I      | counts | 8      |
| Sensor       | CSS current outputs.      | nteger |        | S      |
| Outputs      | (CSSCOUNTSP, CSSCOUNTSR,) |        |        | econds |
| (primary 1,  |                           |        |        |        |
| 2, 3, 4)     |                           |        |        |        |
| (redundant   |                           |        |        |        |
| 1, 2, 3, 4)  |                           |        |        |        |
+--------------+---------------------------+--------+--------+--------+
| Star Tracker | Word 0 -- Time Tag        | I      | None   | 8      |
| -            |                           | nteger |        | S      |
|              | Word 1 -- Time Tag        |        |        | econds |
| (STAout 1 &  |                           | I      |        |        |
| 2) -         | Word 2 -- Status Word     | nteger |        |        |
|              |                           |        |        |        |
| Data Words   | Word 3 -- Status Word     | Bit    |        |        |
| (1-31)       |                           | Packed |        |        |
|              | Word 4 -- Message Counter |        |        |        |
|              |                           | Bit    |        |        |
|              | Word 5 -- Cmd             | Packed |        |        |
|              | received/rejected         |        |        |        |
|              |                           | I      |        |        |
|              | Word 6 -- Star 1X         | nteger |        |        |
|              | position                  |        |        |        |
|              |                           | Bit    |        |        |
|              | Word 7 -- Star 1Y         | Packed |        |        |
|              | position                  |        |        |        |
|              |                           | I      |        |        |
|              | Word 8 -- Star 1          | nteger |        |        |
|              | intensity                 |        |        |        |
|              |                           | I      |        |        |
|              | Word 9 -- Star 2 X        | nteger |        |        |
|              | position                  |        |        |        |
|              |                           | I      |        |        |
|              | Word 10 -- Star 2Y        | nteger |        |        |
|              | position                  |        |        |        |
|              |                           | I      |        |        |
|              | Word 11 -- Star 2         | nteger |        |        |
|              | intensity                 |        |        |        |
|              |                           | I      |        |        |
|              | Word 12 -- Star 3 X       | nteger |        |        |
|              | position                  |        |        |        |
|              |                           | I      |        |        |
|              | Word 13 -- Star 3 Y       | nteger |        |        |
|              | position                  |        |        |        |
|              |                           | I      |        |        |
|              | Word 14 -- Star 3         | nteger |        |        |
|              | intensity                 |        |        |        |
|              |                           | I      |        |        |
|              | Word 15 -- Star 4 X       | nteger |        |        |
|              | position                  |        |        |        |
|              |                           | I      |        |        |
|              | Word 16 -- Star 4 Y       | nteger |        |        |
|              | position                  |        |        |        |
|              |                           | I      |        |        |
|              | Word 17 -- Star 4         | nteger |        |        |
|              | intensity                 |        |        |        |
|              |                           | I      |        |        |
|              | Word 18 -- Star 5 X       | nteger |        |        |
|              | position                  |        |        |        |
|              |                           | I      |        |        |
|              | Word 19 -- Star 5 Y       | nteger |        |        |
|              | position                  |        |        |        |
|              |                           | I      |        |        |
|              | Word 20 -- Star 5         | nteger |        |        |
|              | intensity                 |        |        |        |
|              |                           | I      |        |        |
|              | Word 21 -- CDD            | nteger |        |        |
|              | temperature               |        |        |        |
|              |                           | I      |        |        |
|              | Word 22 -- Base Plate     | nteger |        |        |
|              | Temperature               |        |        |        |
|              |                           | I      |        |        |
|              | Word 23 -- lens           | nteger |        |        |
|              | temperature               |        |        |        |
|              |                           | I      |        |        |
|              | Word 24 -- Status Word    | nteger |        |        |
|              |                           |        |        |        |
|              | Word 25 -- Status Word    | I      |        |        |
|              |                           | nteger |        |        |
|              | Word 26 -- Back Ground    |        |        |        |
|              | Reading                   | Bit    |        |        |
|              |                           | Packed |        |        |
|              | Word 27 -- Full Field     |        |        |        |
|              | Search Count              | Bit    |        |        |
|              |                           | Packed |        |        |
|              | Word 28 -- Status Word    |        |        |        |
|              |                           | I      |        |        |
|              | Word 29 -- Cancel Code    | nteger |        |        |
|              |                           |        |        |        |
|              | Word 30 -- (Spare)        | I      |        |        |
|              |                           | nteger |        |        |
|              |                           |        |        |        |
|              |                           | Bit    |        |        |
|              |                           | Packed |        |        |
|              |                           |        |        |        |
|              |                           | I      |        |        |
|              |                           | nteger |        |        |
+--------------+---------------------------+--------+--------+--------+

Notes:

1)  Denotes whether data is bit-packed, or expressed in integer format,
    Double Precision Floating Point (DPFP) or Single Precision Floating
    Point (SPFP). The SPFP and DPFP data types are the same as the
    "32-bit floating point" and "48-bit extended precision floating
    point" data types defined in MIL-STD-1750A (see Section 2.2.1,
    Document 14).

2)  Time reference specifies the frequency at which the data is
    downlinked to the ground system.

3)  Torque rod magnetic moment is 500 millamps/sec^2^ whenever the
    Torque Rod is on.

4)  Torque rod polarity is provided within the Status Word 3 in the
    one-second packet.

Table 5.5.4-3. Eight-Second GBAD Packet Data Field Contents (Cont'd)

+--------------+---------------------------+--------+--------+-------+
| Description  | Notes                     | R      | Units  | Sam   |
|              |                           | esolut |        | pling |
|              |                           | ion^1^ |        | Ti    |
|              |                           |        |        | me^2^ |
+--------------+---------------------------+--------+--------+-------+
| Gyro Drift   | The Kalman filter         | DPFP   | r      | 8     |
| Biases (X,   | estimated gyro drift      |        | ad/sec | Se    |
| Y, Z)        | rates, interpreted with   |        |        | conds |
|              | respect to the database   |        |        |       |
|              | constant drift rates      |        |        |       |
|              | (gyro_drift_bias)         |        |        |       |
+--------------+---------------------------+--------+--------+-------+
| Quaternion   | The incremental attitude  | DPFP   | none   | 8     |
| Updates (1,  | update quaternion         |        |        | Se    |
| 2, 3, 4)     | calculated by Kalman      |        |        | conds |
|              | filter (kf_q_sw)          |        |        |       |
+--------------+---------------------------+--------+--------+-------+
| TDE On Time  | Magnetic Torquer On Time  | I      | 1      | 8     |
|              | -- Cumulative over 16     | nteger | 02.4ms | Se    |
|              | second periods^3^         |        | ecs^4^ | conds |
+--------------+---------------------------+--------+--------+-------+
| GNCC Status  | Indicates GNCC Status     | I      | none   | 8     |
| Word 2       | (Reference Table 5.5.4-4  | nteger |        | Se    |
|              | for bit assignments)      |        |        | conds |
| (16 bits)    |                           |        |        |       |
+--------------+---------------------------+--------+--------+-------+

Notes:

1\) Denotes whether data is bit-packed, or expressed in integer format,
Double Precision Floating Point (DPFP) or Single Precision Floating
Point (SPFP). The SPFP and DPFP data types are the same as the "32-bit
floating point" and "48-bit extended precision floating point" data
types defined in MIL-STD-1750A (see Section 2.2.1, Document 14).

2\) Time reference specifies the frequency at which the data is
downlinked to the ground system.

3\) Torque rod magnetic moment is 500 millamps/sec^2^ whenever the
Torque Rod is on.

4\) Torque rod polarity is provided within the Status Word 3 in the
one-second packet.

![](media/image10.wmf){width="6.497916666666667in"
height="3.811111111111111in"}

[]{#__RefHeading___Toc467303643 .anchor}Figure 5.5.4-3. Eight-Second
GBAD Packet Data Field Format

[]{#__RefHeading___Toc519937827 .anchor}Table 5.5.4-4. GNCC Status Word
2 Bit Pattern

+-------------------------+---------------------------------------------+
| [Bits (0 1 2)           | > [Parameter]{.underline}                   |
| 1]{.underline}          |                                             |
+-------------------------+---------------------------------------------+
| 0 0 0                   | > Mode Zero                                 |
+-------------------------+---------------------------------------------+
| 1 0 0                   | > Attitude Hold Mode                        |
+-------------------------+---------------------------------------------+
| 0 1 0                   | > Sun Hold Mode                             |
+-------------------------+---------------------------------------------+
| 1 1 0                   | > Fine Point Mode                           |
+-------------------------+---------------------------------------------+
| 0 0 1                   | > Earth Point Mode                          |
+-------------------------+---------------------------------------------+
| 1 0 1                   | > Sun Point Mode                            |
+-------------------------+---------------------------------------------+
| Bits 3 -- 15            | > Don't Care                                |
+-------------------------+---------------------------------------------+

Note 1. Bit 0 is MSB and Bit 15 is LSB.

##################### 5.6 instrument TELEMETRY

The PM-1 (Aqua) spacecraft carries eight science instruments: Advanced
Microwave Scanning Radiometer for EOS (AMSR-E); Advanced Microwave
Sounding Unit-A (AMSU-A1 and AMSU-A2); Atmospheric Infrared Sounder
(AIRS); Clouds and the Earth's Radiant Energy System (CERES +Y Aft and
CERES -Y Fore); Humidity Sounder for Brazil (HSB); and the Moderate
Resolution Imaging Spectroradiometer (MODIS).

Instrument telemetry may be classified into three types:

-   Instrument science data -- Data collected by the instrument for
    scientific investigation.

-   Instrument engineering data -- All non-science data provided by the
    instrument.

-   Instrument housekeeping data -- The subset of instrument engineering
    data that are required for health and safety monitoring.

Some instruments (e.g. AIRS and MODIS) have all three types of
telemetry, in separate packets. Some instruments have only science
telemetry and housekeeping telemetry. Different telemetry types may use
different packet formats. The following describes the telemetry formats
for different instruments and telemetry types.

############################### 5.6.1 GIRD Instrument Telemetry Packet Format

The GIRD Instrument Telemetry Packet Format is shown in Figure 5.6.1-1.
It is used for science, engineering and housekeeping data of AIRS,
AMSU-A1 & A2, and HSB, as well as for housekeeping data of CERES, MODIS
and AMSR-E. The CERES housekeeping data format needs a special comment:
The CERES instrument packetizes its housekeeping data using the modified
GIIS Instrument Telemetry Packet format and provides the packet to the
ISC. The ISC converts the CERES-generated packet into a GIRD Instrument
Telemetry packet by inserting the entire packet directly into the
Instrument Data Field of a GIRD packet. (For more details, see Section
5.6.9.) The difference between the GIRD Instrument and the Spacecraft
Bus Telemetry packets (Figure 5.5.1-1) resides in the format of the
secondary header. The GIRD instrument packet contains 1 extra octet in
front of the 8 octets of CUC time that both packets have.

[]{#refheading___toc467303644 .anchor}Figure 5.6.1-1. GIRD Instrument
Telemetry Packet Format

############################### 5.6.2 AIRS

The Spacecraft-to-AIRS interface consists of a Primary 1553 Data Bus, a
TAXI high rate data link, and point-to-point analog channels. The
Primary 1553 Data Bus interface is used for commanding the instrument
and collecting housekeeping data from it. The TAXI interface provides a
direct serial interface to the FMU for science data. As a GIRD compliant
instrument, the same GIRD Instrument Telemetry Packet Format defined in
Figure 5.6.1-1 is used for all AIRS telemetry, i.e. engineering data,
science data, and low-rate housekeeping data.

######################################### 5.6.2.1 AIRS Housekeeping Telemetry

AIRS outputs 2 housekeeping data packets via the Primary 1553 Data Bus
every 3 scans (i.e. 8 seconds). The packets are 256 octets in size,
headers included. The last two octets of the Instrument Data field
contain an arithmetic checksum. The packets are available whenever AIRS
is powered on.

######################################### 5.6.2.2 AIRS Science and Engineering Telemetry

98 AIRS science and engineering data packets are output to the FMU/SSR
via the TAXI interface each scan of 2.67 seconds. 96 are Science
packets, and 2 are Engineering packets. The packets are 4,286 octets in
size, headers included. The output is available only when AIRS Group 2
power is on and the high rate interface is turned on. Both of these are
under operator control using AIRS commands. Both are OFF when AIRS is
first powered on.

The 96 science packets consist of 90 scene footprint packets, 4 space
look footprint packets, a radiometric calibration footprint packet and a
combined photometric/spectral calibration footprint packet. The time
stamp in the secondary header is updated every footprint. The AIRS
instrument will begin operation with two standard engineering packets.
The first packet is the nominal (default) engineering data packet, and
the second packet contains memory or buffer status. When needed for
diagnostic purposes, flexible high-rate engineering packets replace the
nominal high-rate engineering packets. A pair of APIDs (416 and 417) are
used for flexible high-rate engineering packets. The internal format of
the flexible high-rate engineering packets is specified by an additional
parameter contained in the data portion of the packets.

############################### 5.6.3 AMSR-E

AMSR-E science data packets are directly fed to the FMU/SSR via a
differential balanced circuit interface akin to RS-422. The spacecraft
ISC collects and packetizes the housekeeping data from AMSR-E.

######################################### 5.6.3.1 AMSR-E Housekeeping Telemetry

AMSR-E housekeeping data are transmitted to the ISC via the serial
digital interface. Unused portions of the serial digital (SD) telemetry
stream shall be filled with all 0's by the AMSR-E instrument to allow
the spacecraft to always read data in sets of 10 bytes. S/C FSW converts
the SPC A and SPC B power status from analog to bilevel data. The SPC A
and SPC B status is concatenated into the AMSR-E Active Bi-level Data
Byte shown in Figure 5.6.3.1-1. The spacecraft shall concatenate the AB,
PB, AA, and PA data with the instrument SD telemetry data to create a
minor frame as shown in Figure 5.6.3.1-2. The unused octets in each
housekeeping minor frame shall be filled with all zeros (0's) to
maintain the minor frame size at 14 octets.

Every 4 seconds, the ISC combines 8 minor frames into a single AMSR-E
Housekeeping Data Packet (Figure 5.6.3.1-3) using the GIRD Instrument
Telemetry Packet format.

![](media/image11.wmf){width="5.541666666666667in"
height="1.9166666666666667in"}

[]{#__RefHeading___Toc467303645 .anchor}Figure 5.6.3.1-1. AMSR-E Active
Bi-level Data Byte Format

+---+---------+---+-----------+---+---------+-----------+-------------+
| M |         |   |           |   |         |           | LSB         |
| S |         |   |           |   |         |           |             |
| B |         |   |           |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
| S |         | A |           | P |         | Active    | Passive     |
| e |         | c |           | a |         | Analog\   | Analog\     |
| r |         | t |           | s |         | Data Word | Data Word   |
| i |         | i |           | s |         |           |             |
| a |         | v |           | i |         | 8 bits    | 8 bits      |
| l |         | e |           | v |         |           |             |
| D |         | B |           | e |         |           |             |
| i |         | i |           | B |         |           |             |
| g |         | l |           | i |         |           |             |
| i |         | e |           | l |         |           |             |
| t |         | v |           | e |         |           |             |
| a |         | e |           | v |         |           |             |
| l |         | l |           | e |         |           |             |
| T |         | \ |           | l |         |           |             |
| e |         | D |           | \ |         |           |             |
| l |         | a |           | D |         |           |             |
| e |         | t |           | a |         |           |             |
| m |         | a |           | t |         |           |             |
| e |         | W |           | a |         |           |             |
| t |         | o |           | W |         |           |             |
| r |         | r |           | o |         |           |             |
| y |         | d |           | r |         |           |             |
|   |         |   |           | d |         |           |             |
| 0 |         | 8 |           |   |         |           |             |
| b |         | b |           | 8 |         |           |             |
| i |         | i |           | b |         |           |             |
| t |         | t |           | i |         |           |             |
| s |         | s |           | t |         |           |             |
|   |         |   |           | s |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
| N |         |   |           |   |         |           |             |
| o |         |   |           |   |         |           |             |
| t |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| s |         |   |           |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
| 1 |         |   |           |   |         |           |             |
| \ |         |   |           |   |         |           |             |
| . |         |   |           |   |         |           |             |
| S |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| r |         |   |           |   |         |           |             |
| i |         |   |           |   |         |           |             |
| a |         |   |           |   |         |           |             |
| l |         |   |           |   |         |           |             |
| D |         |   |           |   |         |           |             |
| i |         |   |           |   |         |           |             |
| g |         |   |           |   |         |           |             |
| i |         |   |           |   |         |           |             |
| t |         |   |           |   |         |           |             |
| a |         |   |           |   |         |           |             |
| l |         |   |           |   |         |           |             |
| T |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| l |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| m |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| t |         |   |           |   |         |           |             |
| r |         |   |           |   |         |           |             |
| y |         |   |           |   |         |           |             |
| : |         |   |           |   |         |           |             |
| R |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| a |         |   |           |   |         |           |             |
| d |         |   |           |   |         |           |             |
| f |         |   |           |   |         |           |             |
| r |         |   |           |   |         |           |             |
| o |         |   |           |   |         |           |             |
| m |         |   |           |   |         |           |             |
| t |         |   |           |   |         |           |             |
| h |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| S |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| r |         |   |           |   |         |           |             |
| i |         |   |           |   |         |           |             |
| a |         |   |           |   |         |           |             |
| l |         |   |           |   |         |           |             |
| D |         |   |           |   |         |           |             |
| i |         |   |           |   |         |           |             |
| g |         |   |           |   |         |           |             |
| i |         |   |           |   |         |           |             |
| t |         |   |           |   |         |           |             |
| a |         |   |           |   |         |           |             |
| l |         |   |           |   |         |           |             |
| T |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| l |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| m |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| t |         |   |           |   |         |           |             |
| r |         |   |           |   |         |           |             |
| y |         |   |           |   |         |           |             |
| i |         |   |           |   |         |           |             |
| n |         |   |           |   |         |           |             |
| t |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| r |         |   |           |   |         |           |             |
| f |         |   |           |   |         |           |             |
| a |         |   |           |   |         |           |             |
| c |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| w |         |   |           |   |         |           |             |
| h |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| n |         |   |           |   |         |           |             |
| 1 |         |   |           |   |         |           |             |
| 0 |         |   |           |   |         |           |             |
| b |         |   |           |   |         |           |             |
| y |         |   |           |   |         |           |             |
| t |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| s |         |   |           |   |         |           |             |
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| d |         |   |           |   |         |           |             |
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| \ |         |   |           |   |         |           |             |
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| v |         |   |           |   |         |           |             |
| a |         |   |           |   |         |           |             |
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| l |         |   |           |   |         |           |             |
| a |         |   |           |   |         |           |             |
| b |         |   |           |   |         |           |             |
| l |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| . |         |   |           |   |         |           |             |
| O |         |   |           |   |         |           |             |
| t |         |   |           |   |         |           |             |
| h |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| r |         |   |           |   |         |           |             |
| w |         |   |           |   |         |           |             |
| i |         |   |           |   |         |           |             |
| s |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| , |         |   |           |   |         |           |             |
| 1 |         |   |           |   |         |           |             |
| 0 |         |   |           |   |         |           |             |
| b |         |   |           |   |         |           |             |
| y |         |   |           |   |         |           |             |
| t |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| s |         |   |           |   |         |           |             |
| o |         |   |           |   |         |           |             |
| f |         |   |           |   |         |           |             |
| f |         |   |           |   |         |           |             |
| i |         |   |           |   |         |           |             |
| l |         |   |           |   |         |           |             |
| l |         |   |           |   |         |           |             |
| d |         |   |           |   |         |           |             |
| a |         |   |           |   |         |           |             |
| t |         |   |           |   |         |           |             |
| a |         |   |           |   |         |           |             |
| ( |         |   |           |   |         |           |             |
| 0 |         |   |           |   |         |           |             |
| 0 |         |   |           |   |         |           |             |
| ~ |         |   |           |   |         |           |             |
| 1 |         |   |           |   |         |           |             |
| 6 |         |   |           |   |         |           |             |
| ~ |         |   |           |   |         |           |             |
| ) |         |   |           |   |         |           |             |
| w |         |   |           |   |         |           |             |
| i |         |   |           |   |         |           |             |
| l |         |   |           |   |         |           |             |
| l |         |   |           |   |         |           |             |
| b |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| p |         |   |           |   |         |           |             |
| l |         |   |           |   |         |           |             |
| a |         |   |           |   |         |           |             |
| c |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| d |         |   |           |   |         |           |             |
| h |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| r |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
| 2 |         |   |           |   |         |           |             |
| \ |         |   |           |   |         |           |             |
| . |         |   |           |   |         |           |             |
| A |         |   |           |   |         |           |             |
| c |         |   |           |   |         |           |             |
| t |         |   |           |   |         |           |             |
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| v |         |   |           |   |         |           |             |
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| B |         |   |           |   |         |           |             |
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| l |         |   |           |   |         |           |             |
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| i |         |   |           |   |         |           |             |
| n |         |   |           |   |         |           |             |
| F |         |   |           |   |         |           |             |
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| g |         |   |           |   |         |           |             |
| u |         |   |           |   |         |           |             |
| r |         |   |           |   |         |           |             |
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| 5 |         |   |           |   |         |           |             |
| . |         |   |           |   |         |           |             |
| 6 |         |   |           |   |         |           |             |
| . |         |   |           |   |         |           |             |
| 3 |         |   |           |   |         |           |             |
| . |         |   |           |   |         |           |             |
| 1 |         |   |           |   |         |           |             |
| - |         |   |           |   |         |           |             |
| 1 |         |   |           |   |         |           |             |
| . |         |   |           |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
| 3 |         |   |           |   |         |           |             |
| \ |         |   |           |   |         |           |             |
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| w |         |   |           |   |         |           |             |
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| b |         |   |           |   |         |           |             |
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| p |         |   |           |   |         |           |             |
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+---+---------+---+-----------+---+---------+-----------+-------------+
| 4 |         |   |           |   |         |           |             |
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| 8 |         |   |           |   |         |           |             |
| \ |         |   |           |   |         |           |             |
| M |         |   |           |   |         |           |             |
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| d |         |   |           |   |         |           |             |
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| d |         |   |           |   |         |           |             |
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| w |         |   |           |   |         |           |             |
| i |         |   |           |   |         |           |             |
| t |         |   |           |   |         |           |             |
| h |         |   |           |   |         |           |             |
| t |         |   |           |   |         |           |             |
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| f |         |   |           |   |         |           |             |
| o |         |   |           |   |         |           |             |
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| w |         |   |           |   |         |           |             |
| i |         |   |           |   |         |           |             |
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| g |         |   |           |   |         |           |             |
| t |         |   |           |   |         |           |             |
| a |         |   |           |   |         |           |             |
| b |         |   |           |   |         |           |             |
| l |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| : |         |   |           |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
|   | Minor   |   | Data      |   |         |           |             |
|   | Frame   |   |           |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
|   | 1, 9,   |   | ADE A     |   |         |           |             |
|   | 17, 25  |   | Motor     |   |         |           |             |
|   |         |   | Current   |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
|   | 2, 10,  |   | ADE A     |   |         |           |             |
|   | 18, 26  |   | Speed     |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
|   | 3, 11,  |   | ADE B     |   |         |           |             |
|   | 19, 27  |   | Motor     |   |         |           |             |
|   |         |   | Current   |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
|   | 4, 12,  |   | ADE B     |   |         |           |             |
|   | 20, 28  |   | Speed     |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
|   | 5, 12,  |   | MWA Motor |   |         |           |             |
|   | 21, 29  |   | Current   |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
|   | 6, 13,  |   | MWA Speed |   |         |           |             |
|   | 22, 30  |   |           |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
|   | 7, 8,   |   | Fill      |   |         |           |             |
|   | 15, 16  |   | Pattern   |   |         |           |             |
|   |         |   | (00~16~)  |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
|   | 23, 24, |   | Fill      |   |         |           |             |
|   | 31, 32  |   | Pattern   |   |         |           |             |
|   |         |   | (00~16~)  |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
| 5 |         |   |           |   |         |           |             |
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| f |         |   |           |   |         |           |             |
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| d |         |   |           |   |         |           |             |
| w |         |   |           |   |         |           |             |
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| l |         |   |           |   |         |           |             |
| l |         |   |           |   |         |           |             |
| b |         |   |           |   |         |           |             |
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| i |         |   |           |   |         |           |             |
| n |         |   |           |   |         |           |             |
| a |         |   |           |   |         |           |             |
| c |         |   |           |   |         |           |             |
| c |         |   |           |   |         |           |             |
| o |         |   |           |   |         |           |             |
| r |         |   |           |   |         |           |             |
| d |         |   |           |   |         |           |             |
| a |         |   |           |   |         |           |             |
| n |         |   |           |   |         |           |             |
| c |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| w |         |   |           |   |         |           |             |
| i |         |   |           |   |         |           |             |
| t |         |   |           |   |         |           |             |
| h |         |   |           |   |         |           |             |
| t |         |   |           |   |         |           |             |
| h |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| f |         |   |           |   |         |           |             |
| o |         |   |           |   |         |           |             |
| l |         |   |           |   |         |           |             |
| l |         |   |           |   |         |           |             |
| o |         |   |           |   |         |           |             |
| w |         |   |           |   |         |           |             |
| i |         |   |           |   |         |           |             |
| n |         |   |           |   |         |           |             |
| g |         |   |           |   |         |           |             |
| t |         |   |           |   |         |           |             |
| a |         |   |           |   |         |           |             |
| b |         |   |           |   |         |           |             |
| l |         |   |           |   |         |           |             |
| e |         |   |           |   |         |           |             |
| : |         |   |           |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
|   | Minor   |   | Data      |   |         |           |             |
|   | Frame   |   |           |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
|   | 1, 9,   |   | SPC A     |   |         |           |             |
|   | 17, 25  |   | Te        |   |         |           |             |
|   |         |   | mperature |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
|   | 2, 10,  |   | SPC B     |   |         |           |             |
|   | 18, 26  |   | Te        |   |         |           |             |
|   |         |   | mperature |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
|   | 3, 11,  |   | Fill      |   |         |           |             |
|   | 19, 27  |   | Pattern   |   |         |           |             |
|   |         |   | (00~16~)  |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
|   | 4, 12,  |   | Fill      |   |         |           |             |
|   | 20, 28  |   | Pattern   |   |         |           |             |
|   |         |   | (00~16~)  |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
|   | 5, 12,  |   | Fill      |   |         |           |             |
|   | 21, 29  |   | Pattern   |   |         |           |             |
|   |         |   | (00~16~)  |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
|   | 6, 13,  |   | Fill      |   |         |           |             |
|   | 22, 30  |   | Pattern   |   |         |           |             |
|   |         |   | (00~16~)  |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
|   | 7, 8,   |   | Fill      |   |         |           |             |
|   | 15, 16  |   | Pattern   |   |         |           |             |
|   |         |   | (00~16~)  |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+
|   | 23, 24, |   | Fill      |   |         |           |             |
|   | 31, 32  |   | Pattern   |   |         |           |             |
|   |         |   | (00~16~)  |   |         |           |             |
+---+---------+---+-----------+---+---------+-----------+-------------+

[]{#__RefHeading___Toc467303646 .anchor}Figure 5.6.3.1-2. AMSR-E
Housekeeping Data Minor Frame Format

[]{#__RefHeading___Toc467303647 .anchor}Figure 5.6.3.1-3. AMSR-E
Housekeeping Data Packet

######################################### 5.6.3.2 AMSR-E Science and Engineering Telemetry

The science and engineering data output from AMSR-E instrument are in
CCSDS packets with an unique CCSDS packet secondary header format
defined in Figure 5.6.3.2-1. No other instrument on the PM-1 (Aqua)
spacecraft uses this packet format. Like the GIRD Instrument Telemetry
Packet format, the AMSR-E Science Telemetry Packet format (Figure
5.6.3.2-1) has a 9-octet Secondary Header and uses the CUC time code.
But unlike the GIRD Telemetry format, the Secondary Header of an AMSR-E
Science Packet contains two spacer octets and a time stamp consisting of
1 octet P-field and 5 octets T-field. The single-octet fine time has a
resolution of 3.892 msec. The second octet of fine time providing 15.2
micro-sec resolution is placed outside the Secondary Header in the first
octet of the data field. The second octet of fine time is not needed for
EDOS processing; it is made available for potential use in scientific
data processing. The AMSR-E sensor unit rotates at 40 RPM, i.e.1.5
second per revolution. Every 1.5 second AMSR-E outputs a group of 16
science and engineering data packets to the FMU/SSR that have the same
APID and time stamp, but monotonically increasing Packet Sequence
Counts, each packet 1,024 octet in size. The first and the last packets
in the group have Sequence Flags of "01" and "10" respectively; the 14
packets between them all have the same Sequence Flag of "00".

[]{#__RefHeading___Toc467303648 .anchor}Figure 5.6.3.2-1. AMSR-E Science
and Engineering Data Packet Format

############################### 5.6.4 AMSU-A1

The Spacecraft to AMSU-A1 interface consists of a Primary 1553 Data Bus
and point-to-point analog channel. The Primary 1553 Data Bus interface
is used for commanding the instrument and collecting Low Rate
Housekeeping data and low-rate science data from it. The AMSU-A1
instrument uses GIRD Instrument Telemetry packets (Figure 5.6.1-1) for
housekeeping data, science and engineering data. For each instrument
observation mode, the science and engineering data collected over the 8
second scan are divided into two packets with identical Secondary
Headers but different APIDs and packet sizes. The first packet has an
odd APID, and the second packet has an even APID - one greater than the
first packet's. This is intended to facilitate ground re-assembly of the
data in the two packets. The ground system should be aware of the fact
that the last six octets of the AMSU-A1 packets contain no useful data
and should be ignored. The six octets were added by the PM-1 (Aqua)
spacecraft flight software to compensate for a packet length error
discovered in the AMSU-A1 firmware.

############################### 5.6.5 AMSU-A2

The Spacecraft-to-AMSU-A2 interface consists of a Primary 1553 Data Bus
and point-to-point analog channel. The Primary 1553 Data Bus interface
is used for commanding the instrument and collecting housekeeping data
and science and engineering data from it. The AMSU-A2 instrument uses
GIRD Instrument Telemetry Packet format (Figure 5.6.1-1) for
housekeeping data, science and engineering data.

The AMSU-A2 telemetry packet is the same format for housekeeping and
science and engineering data as shown in Figure 5.6.1-1. AMSU-A2 outputs
only one science and engineering data packet each 8 second scan. Its
housekeeping data packet is also much shorter than AMSU-A1's. The ground
system should be aware of the fact that the last six octets of the
AMSU-A2 packets contain no useful data and should be ignored. The six
octets were added by the PM-1 (Aqua) spacecraft flight software to
compensate for a packet length error discovered in the AMSU-A2 firmware.

############################### 5.6.6 HSB

Every 8 seconds HSB completes three scans and sends a total of 80 minor
frames of unpacketized data to the spacecraft via a dedicated serial
digital interface, 78 of which contains science and engineering data,
the first and the last contain no data. Each minor frame contains 25
16-bit words. The spacecraft ISC packetizes the 78 minor frames of data
into six science and engineering data packets and three housekeeping
packets, i.e. two science and engineering data packets and one
housekeeping data packets for each scan. The GIRD Instrument Telemetry
Packet format (Figure 5.6.1-1) is used for all HSB telemetry.

######################################### 5.6.6.1 HSB Science and Engineering Telemetry

The two HSB science and engineering data packets for each scan have the
same APID and time stamp, but monotonically increasing Packet Sequence
Counts, each packet containing 13 minor frames of data. The Sequence
Flag in the Primary Header of the first packet is set to "01" to
indicate it contains the first half of the data, and the Sequence Flag
is set to "10" for the second packet to indicate it contains the second
half of the data.

The time stamp for the first two of the six science and engineering data
packets generated every 8 seconds represents the S/C time at the 8
second boundary plus 123.1 msec; this time stamp is incremented by 2.6
seconds for the third and fourth packets, and 5.2 seconds for the fifth
and sixth packets.

######################################### 5.6.6.2 HSB Housekeeping Telemetry

The ISC copies the housekeeping data from minor frames 25-26, 51-52 and
77-78 to form three housekeeping data packets, each 67 octets in size.
Each packet contains a single 26-word minor frame of data. The time
stamp for the first of the three housekeeping packets generated every 8
seconds represents the S/C time at the 8 second boundary plus 123.1
msec. The time stamp for the other two packets increments in steps of
2.6 second.

############################### 5.6.7 GIIS Instrument Telemetry Packet Format

The GIIS Instrument Telemetry Packet format is used for MODIS science
and engineering packets that MODIS sends to the FMU/SSR directly via the
TAXI interface and for CERES science packets. The main difference
between the GIIS and the GIRD Instrument Packet formats is in the
secondary header. Unlike the GIRD Instrument Packet, the first 8 octets
of the Secondary Header in the GIIS Instrument Packet is the Time Stamp
expressed in CCSDS Day Segmented Time Code. The remaining 8 bits are
User Flags. Within the Time Code, the first seven bits of the day field
are implied and not actually transmitted. That is, this information is
not included in the Time Stamp. These seven bits are: 1000001. The
transmitted bits shall be binary representations of the number of
milliseconds since the beginning of the current day and the number of
microseconds in the current millisecond. Figure 5.6.7-1 defines format
and content of the GIIS Instrument Telemetry Packet. This packet format
is used only for CERES science data and for MODIS science and
engineering data.

[]{#__RefHeading___Toc467303651
.anchor}![](media/image12.wmf){width="6.472222222222222in"
height="6.208333333333333in"}Figure 5.6.7-1. GIIS Instrument Telemetry
Packet Format

############################### 5.6.8 MODIS

The Spacecraft-to-MODIS interface consists of a Primary 1553 Data bus,
high-rate science link, point-to-point relay drive commands, and
point-to-point analog and bilevel telemetry channels. The Primary 1553
Data Bus is used for commanding the instrument and collecting low rate
housekeeping data from it. MODIS is not GIRD compliant. The housekeeping
data output is not packetized.

######################################### 5.6.8.1 MODIS Housekeeping Telemetry

The ISC is responsible for collection and packetization of MODIS
housekeeping data and dump data, and providing synchronization
information to MODIS (e.g., major, and minor cycle counts, spacecraft
heartbeat). Once every second the ISC packetizes the 32 16-bit words
MODIS housekeeping data, as received, into the GIRD Instrument Telemetry
Packet Format defined in Figure 5.6.1-1. MODIS does not use Checksum for
its housekeeping data.

################################################### 5.6.8.1.1 MODIS Housekeeping Data Frame

![](media/image13.wmf){width="5.375in" height="1.8611111111111112in"}The
MODIS Housekeeping Data Frame Format and data collection times is shown
in Figure 5.6.8.1.1-1.

[]{#__RefHeading___Toc467303652 .anchor}Figure 5.6.8.1.1-1. MODIS Data
Frame Format

######################################### 5.6.8.2 MODIS Science and Engineering Telemetry

MODIS also has a TAXI link direct to the FMU/SSR for high rate science
and engineering data output. The data is CCSDS packetized in GIIS
Instrument Telemetry Packet format shown in Figure 5.6.7-1. MODIS
completes one scan in 1.477 second. MODIS collects data in both Day Mode
and Night Mode. When in the Day Mode, 3,032 science and engineering data
packets are generated each scan, whereas in the Night Mode, 1,678
packets are generated each scan. These packets include a 12 bit Checksum
in the Data Field.

################################################### 5.6.8.2.1 MODIS Fill Data

The instrument data field of the MODIS night packet contains 2,040 bits
of data and 12 bits of fill data (all zeroes).

######################################### 5.6.8.3 MODIS Test Packet

MODIS test packets may be generated on ground or on orbit, the Type bit
in the Primary Header is set to "1", and the APID is changed to 127. The
packet will be either the size of the Day Mode science and engineering
data packet or that of the Night Mode packet.

######################################### 5.6.8.4 MODIS Dump Data

MODIS memory dumps consist of a MODIS Dump Initiate Command, shown in
Table 5.6.8.4-1, followed by a memory dump buffer read. MODIS dump data
is a maximum of 32 words, and is not packetized. The dump data is sent
via the 1553 bus to the S/C ISC where it is inserted into the Instrument
Data field of a GIRD packet. The S/C will pick up the dump data in 32
word blocks at 1-second intervals and will continue to retrieve the same
32 words of dump data until the next Dump Initiate Command is received
or the ground turns off the processing. If less than 32 words of dump
data is requested, it will be up to the ground system to know which and
how many words were requested in the dump command.

[]{#__RefHeading___Toc519937828 .anchor}Table 5.6.8.4-1. Bus Memory Dump
Initiate Command

+----------------------+----------------+------------------------------+
| MSB LSB              |                |                              |
|                      |                |                              |
| 0 4 5 7 8 15         |                |                              |
+----------------------+----------------+------------------------------+
| 11110                | 101            | Table                        |
+----------------------+----------------+------------------------------+
| P CLS A              |                |                              |
+----------------------+----------------+------------------------------+
| Dump start address   |                |                              |
| (most significant    |                |                              |
| word)                |                |                              |
+----------------------+----------------+------------------------------+
| Dump start address   |                |                              |
| (least significant   |                |                              |
| word)                |                |                              |
+----------------------+----------------+------------------------------+
| Word count (most     |                |                              |
| significant word)    |                |                              |
+----------------------+----------------+------------------------------+
| Word count (least    |                |                              |
| significant word)    |                |                              |
+----------------------+----------------+------------------------------+

############################### 5.6.9 CERES

The Spacecraft-to-CERES interface consists of a Primary 1553 Data Bus, a
high-level pulse for reset, and point-to-point analog channels. The
Primary 1553 Data Bus interface is used for collecting housekeeping data
and science data from the CERES. Every 6.6 seconds CERES outputs a
housekeeping packet and a science packet. The science packet is in the
GIIS Instrument Telemetry Packet format shown in Figure 5.6.7-1, while
the housekeeping packet is in the modified GIIS Instrument Telemetry
Packet format defined in Section 5.6.9.1. The Spacecraft converts the
housekeeping packet into a GIRD Instrument Telemetry packet by inserting
it directly into the Instrument Data Field of a GIRD packet for downlink
to the ground station.

Reference Section 2.2.2, Document 5, for details of the high-level reset
pulse and the point-to-point analog channel interfaces.

######################################### 5.6.9.1 CERES Housekeeping Telemetry

CERES packetizes its housekeeping data using the modified GIIS
Instrument Telemetry Packet format, which differs from the GIIS
Instrument Telemetry Packet format shown in Figure 5.6.7-1 in that the
72-bit secondary header is reduced to 64 bits by removing the last octet
containing the Quick Look flag. The modified GIIS packets are delivered
to the PM-1 (Aqua) S/C, which then converts them into GIRD Instrument
Telemetry packets (Figure 5.6.1-1) by adding the GIRD Primary and
Secondary Headers. The total H/K packet size that is downlinked to the
ground is 271 octets, (i.e., 256 octet original CERES Housekeeping
packet + 15 octet GIRD Primary and Secondary headers).

**5.6.9.2 CERES Science Telemetry**

The CERES instrument delivers science data to the spacecraft in GIIS
Instrument Telemetry Packet Format as defined in Figure 5.6.7-1. But the
Sequence Flag is erroneously set to "00", and the Quick Look Flag is
always set to zero. The 6,994 octet packet is divided into seven data
blocks for transfer to the spacecraft. Each block is 1024 octets long
except for the last one, whose length is 850 octets. CERES does not use
checksum.

########### APPENDIX A PM-1 (AQUA) COMMANDS/DATA UPLINK SUMMARY

**Security Note: Per "NASA Internet Publishing Content Guidelines,
Information That Must [Not]{.underline} Be Published Via the Internet",
the remaining text in this section except for the table titles have been
removed.**

[]{#__RefHeading___Toc519937829 .anchor}Table A-1 Command/Data Format
Summary

[]{#__RefHeading___Toc519937830 .anchor}Table A-2. Telecommand Packet
List

Table A-2. Telecommand Packet List (Cont'd)

########### 

########### 

########### APPENDIX B PM-1 (AQUA) TELEMETRY SUMMARY

-   Two downlink frequencies:

1.  S-band for S/C bus and instrument housekeeping telemetry:

> \- GN mode: 16.384/524.288 Kbps for real time and playback
> housekeeping telemetry, convolutional and Reed-Solomon coded
>
> \- SN mode: 1.024 Kbps and 4.096 Kbps housekeeping telemetry,
> convolutional and Reed-Solomon coded
>
> \- On/Off Commandable CCSDS Randomizer -- The default configuration at
> launch is: S-band GN mode telemetry is randomized, S-band SN mode is
> not.

2.  X-band for instrument science and engineering data and S/C bus and
    instrument housekeeping telemetry, Reed-Solomon coded only:

> \- DB mode: 15 Mbps direct broadcast of real time data to any
> receiving ground station
>
> \- DP mode: 150 Mbps direct playback of stored data to PGSs
>
> \- On/Off Commandable CCSDS Randomizer -- The default configuration at
> launch is: X-band telemetry is randomized in both DB mode and DP mode.

-   Data format:

> \- NRZ-L for S-band telemetry
>
> \- NRZ-M for X-band telemetry

-   Two Types of CADU Formats:

> \- S-band CADUs (Figure 5.2.1-1): 256 octets in length, interleave
> depth of 1
>
> \- X-band CADUs (Figure 5.2.2-1): 1,024 octets in length, interleave
> depth of 4

-   Three S-band GN Mode Telemetry Virtual Channels (VC):

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```
-   VC#1: Playback Housekeeping Telemetry

-   VC#2: Real Time Housekeeping Telemetry

-   VC#63: Fill CADUs

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```
-   Eleven X-band Virtual Channels:

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```
-   VC#3: Ground Based Attitude Determination (GBAD) Data

-   VC#5: Spacecraft Bus and Instrument Housekeeping Telemetry

-   VC#10: CERES +Y Aft Science Data

-   VC#15: CERES --Y Fore Science Data

-   VC#20: AMSU-A1 Science and Engineering Data

-   VC#25: AMSU-A2 Science and Engineering

-   VC#30: MODIS Science and Engineering Data

-   VC#35: AIRS Science and Engineering Data

-   VC#40: AMSR-E Science and Engineering Data

-   VC#45: HSB Science and Engineering Data

-   VC#63: Fill CADUs

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```
-   Five telemetry packet formats:

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```
-   GIRD Instrument Telemetry Packet

-   GIIS Instrument Telemetry Packet

-   AMSR-E Science Telemetry Packet

-   S/C Bus Telemetry Packet

-   SUROM/TIE Telemetry Packet

> The differences are identified in Table B-1 below, most of them are in
> the secondary header format:

[]{#__RefHeading___Toc519937831 .anchor}Table B-1 Telemetry Packet
Format Comparison

  ------------- --------------- ------------- -------- ------------ ------------ -------------
  **Telemetry   **Reference**   **Secondary   **Time   **Time Code\ **Time Code  **Quicklook
  Packet Format                 Header Length Code\    P-Field      T-Field      Flag Location
  Type**                        (Octets)**    Type**   Length       Length       in Sec.
                                                       (Octets)**   (Octets)**   Header**

  Spacecraft    Figure 5.5.1-1  8             CUC      2            6            No Flag
  Bus                                                                            

  SUROM/TIE     Figure          0             N/A      0            0            No Flag
                5.4.1.1-1                                                        

  GIRD          Figure 5.6.1-1  9             CUC      2            6            2^nd^ Bit
  Instrument                                                                     

  AMSR-E        Figure          9             CUC      1            52           2^nd^ Bit
  Science       5.6.3.3-1                                                        

  GIIS          Figure 5.6.7-1  9             CDS      0            8            65^th^ Bit
  Instrument1                                                                    
  ------------- --------------- ------------- -------- ------------ ------------ -------------

> Notes:
>
> 1 MODIS uses this telemetry packet format for science and engineering
> data. CERES uses this format for science data only. But CERES packets
> have the Sequence Flag erroneously set to "00", while MODIS packets
> have the correct Sequence Flag value of "11". The Type bit in the
> Primary Header is set to "1" for MODIS test packets which have an APID
> of 127.
>
> 2 The 5 octets of the T-field contain 1 octet of fine time (3.90625
> msec resolution); the second octet of fine time (15.2 micro-sec
> resolution) is placed outside the Secondary Header: in the first octet
> of the data field. This octet is made available for potential use in
> scientific processing, it is not needed for EDOS processing.
>
> Comments on Sequence Flag of Primary Packet Header:
>
> All PM-1 (Aqua) telemetry packets have the Sequence Flag set at "11"
> except for the HSB science and engineering data packets and the AMSR-E
> science and engineering data packets, where the Sequence Flag is used
> to denote the data sequence for a group of packets. The Sequence Flag
> is set to "01" for the first packet of the group, "10" for the last
> packet, and "00" for any in-between packets. HSB science and
> engineering data packets are in groups of two, so there is no
> in-between packets. With a packet group of 16, AMSR-E has 14
> in-between packets. Another exception is the CERES science packets,
> whose Sequence Flag is erroneously set to "00".

[]{#__RefHeading___Toc519937832 .anchor}Table B-2. S-Band GN Mode
16.384/524.288 Kbps Telemetry Packets~~\
~~(Packet List 1)

+----+----+------+------------------+---------+---------------------+
| VC |    | APID | Packet Format    | Packet  | Contents            |
| ID |    |      | Type             | Size\*  |                     |
|    |    |      |                  |         |                     |
|    |    |      |                  | (incl.  |                     |
|    |    |      |                  | Hdrs)   |                     |
|    |    |      |                  |         |                     |
|    |    |      |                  | (       |                     |
|    |    |      |                  | Octets) |                     |
+====+====+======+==================+=========+=====================+
| L  | H  |      |                  |         |                     |
| RC | RC |      |                  |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 484  | SUROM/TIE        | 160     | S/C ISC "A" SUROM   |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 487  | SUROM/TIE        | 160     | S/C ISC "B" SUROM   |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 490  | SUROM/TIE        | 160     | S/C PC "A" SUROM    |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 493  | SUROM/TIE        | 160     | S/C PC "B" SUROM    |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 496  | SUROM/TIE        | 160     | S/C GNCC "A" SUROM  |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 499  | SUROM/TIE        | 160     | S/C GNCC "B" SUROM  |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 502  | SUROM/TIE        | 160     | S/C CTC "A" SUROM   |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 505  | SUROM/TIE        | 160     | S/C CTC "B" SUROM   |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 508  | Spacecraft Bus   | 17      | S/C ISC -- FT 0     |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 509  | Spacecraft Bus   | 47      | S/C ISC -- FT 1     |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 510  | Spacecraft Bus   | 29      | S/C ISC -- FT 2     |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 511  | Spacecraft Bus   | 123     | S/C ISC -- FT 3     |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 512  | Spacecraft Bus   | 120     | S/C ISC -- FT 4     |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 513  | Spacecraft Bus   | 121     | S/C ISC -- FT 5     |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 5    | Spacecraft Bus   | 16 -    | **Reserved** - S/C  |
|    |    | 14 - | Telemetry        | 256     | ISC                 |
|    |    | 517  |                  |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 5    | Spacecraft Bus   | 16 -    | **Reserved** - S/C  |
|    |    | 22 - | Telemetry        | 256     | ISC                 |
|    |    | 635  |                  |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 636  | Spacecraft Bus   | 20 -    | S/C ISC Memory Dump |
|    |    |      | Telemetry        | 256     |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 6    | Spacecraft Bus   | 16 -    | **Reserved** - S/C  |
|    |    | 37 - | Telemetry        | 256     | ISC                 |
|    |    | 662  |                  |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 663  | Spacecraft Bus   | 82      | S/C PC --FT 0       |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 664  | Spacecraft Bus   | 175     | S/C PC --FT 1       |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 665  | Spacecraft Bus   | 169     | S/C PC --FT 2       |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 666  | Spacecraft Bus   | 176     | S/C PC --FT 3       |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 667  | Spacecraft Bus   | 31      | S/C PC --FT 4       |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 668  | Spacecraft Bus   | 54      | S/C PC --FT 5       |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 669  | Spacecraft Bus   | 192     | S/C PC --FT 6       |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 6    | Spacecraft Bus   | 16 -    | **Reserved** - S/C  |
|    |    | 70 - | Telemetry        | 256     | PC                  |
|    |    | 672  |                  |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 6    | Spacecraft Bus   | 16 -    | **Reserved** - S/C  |
|    |    | 79 - | Telemetry        | 256     | PC                  |
|    |    | 790  |                  |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 791  | Spacecraft Bus   | 20 -    | S/C PC Memory Dump  |
|    |    |      | Telemetry        | 256     |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 7    | Spacecraft Bus   | 16 -    | **Reserved** - S/C  |
|    |    | 92 - | Telemetry        | 256     | PC                  |
|    |    | 817  |                  |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 818  | Spacecraft Bus   | 160     | S/C GNCC -- FT 0    |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 819  | Spacecraft Bus   | 82      | S/C GNCC -- FT 1    |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 820  | Spacecraft Bus   | 239     | S/C GNCC -- FT 2    |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 821  | Spacecraft Bus   | 246     | S/C GNCC -- FT 3    |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 822  | Spacecraft Bus   | 162     | S/C GNCC -- FT 4    |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 823  | Spacecraft Bus   | 147     | S/C GNCC -- FT 5    |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 824  | Spacecraft Bus   | 122     | S/C GNCC -- FT 6    |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 825  | Spacecraft Bus   | 252     | S/C GNCC -- FT 7    |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 826  | Spacecraft Bus   | 250     | S/C GNCC -- FT 8    |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 827  | Spacecraft Bus   | 250     | S/C GNCC -- FT 9    |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 828  | Spacecraft Bus   | 212     | S/C GNCC -- FT 10   |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 829  | Spacecraft Bus   | 142     | S/C GNCC -- FT 11   |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 830  | Spacecraft Bus   | 222     | S/C GNCC -- FT 12   |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 831  | Spacecraft Bus   | 186     | S/C GNCC -- FT 13   |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 832  | Spacecraft Bus   | 226     | S/C GNCC -- FT 14   |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 8    | Spacecraft Bus   | 16 -    | **Reserved** - S/C  |
|    |    | 34 - | Telemetry        | 256     | GNCC                |
|    |    | 929  |                  |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 930  | Spacecraft Bus   | 20 -    | S/C GNCC Memory     |
|    |    |      | Telemetry        | 256     | Dump                |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 9    | Spacecraft Bus   | 16 -    | **Reserved** - S/C  |
|    |    | 31 - | Telemetry        | 256     | GNCC                |
|    |    | 932  |                  |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 9    | Spacecraft Bus   | 16 -    | **Reserved** - S/C  |
|    |    | 34 - | Telemetry        | 256     | GNCC                |
|    |    | 956  |                  |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 973  | Spacecraft Bus   | 18      | S/C CTC (On-line)   |
|    |    |      | Telemetry        |         | -- FT 0             |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 974  | Spacecraft Bus   | 168     | S/C CTC (On-line)   |
|    |    |      | Telemetry        |         | -- FT 1             |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 975  | Spacecraft Bus   | 51      | S/C CTC (On-line)   |
|    |    |      | Telemetry        |         | -- FT 2             |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 976  | Spacecraft Bus   | 115     | S/C CTC (On-line)   |
|    |    |      | Telemetry        |         | -- FT 3             |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 977  | Spacecraft Bus   | 113     | S/C CTC (On-line)   |
|    |    |      | Telemetry        |         | -- FT 4             |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 978  | Spacecraft Bus   | 50      | S/C CTC (On-line)   |
|    |    |      | Telemetry        |         | -- FT 5             |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 979  | Spacecraft Bus   | 968     | S/C CTC (On-line)   |
|    |    |      | Telemetry        |         | -- FT 6             |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 9    | Spacecraft Bus   | 16 -    | **Reserved** - S/C  |
|    |    | 80 - | Telemetry        | 256     | CTC (On-line)       |
|    |    | 981  |                  |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 9    | Spacecraft Bus   | 16 -    | **Reserved** - S/C  |
|    |    | 87 - | Telemetry        | 256     | CTC (On-line)       |
|    |    | 999  |                  |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 1000 | Spacecraft Bus   | 50      | S/C CTC (On-Line)   |
|    |    |      | Telemetry        |         | -- FT 14 GIRD/GIIS  |
|    |    |      |                  |         | Times               |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 10   | Spacecraft Bus   | 16 -    | **Reserved** - S/C  |
|    |    | 01 - | Telemetry        | 256     | CTC (On-line)       |
|    |    | 1100 |                  |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 1101 | Spacecraft Bus   | 20 -    | S/C CTC (On-line)   |
|    |    |      | Telemetry        | 256     | Memory Dump         |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 11   | Spacecraft Bus   | 16 -    | **Reserved** - S/C  |
|    |    | 02 - | Telemetry        | 256     | CTC (On-line)       |
|    |    | 1127 |                  |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 1128 | Spacecraft Bus   | 72      | S/C CTC (Off-line)  |
|    |    |      | Telemetry        |         | -- FT 13            |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 11   | Spacecraft Bus   | 16 -    | **Reserved** - S/C  |
|    |    | 29 - | Telemetry        | 256     | CTC (Off-line)      |
|    |    | 1135 |                  |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 1136 | Spacecraft Bus   | 20 -    | S/C CTC (Off-line)  |
|    |    |      | Telemetry        | 256     | Memory Dump         |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 11   | Spacecraft Bus   | 16 -    | **Reserved** - S/C  |
|    |    | 37 - | Telemetry        | 256     | CTC (Off-line)      |
|    |    | 1147 |                  |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 11   | SUROM/TIE        | 16 - 38 | **Reserved** - TIE  |
|    |    | 48 - | Telemetry        |         |                     |
|    |    | 1149 |                  |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 1150 | SUROM/TIE        | 38      | TIE                 |
|    |    |      | Telemetry        |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 1    | SUROM/TIE        | 16 - 38 | **Reserved** - TIE  |
|    |    | 151- | Telemetry        |         |                     |
|    |    | 1153 |                  |         |                     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 113  | GIRD Instrument  | 79      | MODIS Dump Data     |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 114  | GIRD Instrument  | 79      | MODIS Low Rate      |
|    |    |      |                  |         | Housekeeping Data   |
+----+----+------+------------------+---------+---------------------+
| 2  | 1  | 140  | GIRD Instrument  | 271     | CERES +Y Aft Low    |
|    |    |      |                  |         | Rate Housekeeping   |
|    |    |      |                  |         | Data                |
+----+----+------+------------------+---------+---------------------+

\* Packet Size (in octets) = CCSDS-defined Packet Length + 7.

Table B-2. S-Band GN Mode 16.384/524.288 Kbps Telemetry Packets\
(Packet List 1 -- Cont'd)

+----+----+-------+-------------------+---------+--------------------+
| VC |    | APID  | Packet Format     | Packet  | Contents           |
| ID |    |       | Type              | Size\*  |                    |
|    |    |       |                   |         |                    |
|    |    |       |                   | (incl.  |                    |
|    |    |       |                   | Hdrs)   |                    |
|    |    |       |                   |         |                    |
|    |    |       |                   | (       |                    |
|    |    |       |                   | Octets) |                    |
+====+====+=======+===================+=========+====================+
| L  | H  |       |                   |         |                    |
| RC | RC |       |                   |         |                    |
+----+----+-------+-------------------+---------+--------------------+
| 2  | 1  | 156   | GIRD Instrument   | 271     | CERES -Y Fore Low  |
|    |    |       |                   |         | Rate Housekeeping  |
|    |    |       |                   |         | Data               |
+----+----+-------+-------------------+---------+--------------------+
| 2  | 1  | 220   | GIRD Instrument   | 127     | AMSR-E Low Rate    |
|    |    |       |                   |         | Housekeeping Data  |
+----+----+-------+-------------------+---------+--------------------+
| 2  | 1  | 264   | GIRD Instrument   | 162     | AMSU-A1 Low Rate   |
|    |    |       |                   |         | Housekeeping       |
|    |    |       |                   |         | Data - No Mode     |
+----+----+-------+-------------------+---------+--------------------+
| 2  | 1  | 265   | GIRD Instrument   | 162     | AMSU-A1 Low Rate   |
|    |    |       |                   |         | Housekeeping       |
|    |    |       |                   |         | Data - Staring     |
|    |    |       |                   |         | Mode               |
+----+----+-------+-------------------+---------+--------------------+
| 2  | 1  | 266   | GIRD Instrument   | 162     | AMSU-A1 Low Rate   |
|    |    |       |                   |         | Housekeeping       |
|    |    |       |                   |         | Data - Full Scan   |
|    |    |       |                   |         | Mode               |
+----+----+-------+-------------------+---------+--------------------+
| 2  | 1  | 296   | GIRD Instrument   | 88      | AMSU-A2 Low Rate   |
|    |    |       |                   |         | Housekeeping       |
|    |    |       |                   |         | Data - No Mode     |
+----+----+-------+-------------------+---------+--------------------+
| 2  | 1  | 297   | GIRD Instrument   | 88      | AMSU-A2 Low Rate   |
|    |    |       |                   |         | Housekeeping       |
|    |    |       |                   |         | Data - Staring     |
|    |    |       |                   |         | Mode               |
+----+----+-------+-------------------+---------+--------------------+
| 2  | 1  | 298   | GIRD Instrument   | 88      | AMSU-A2 Low Rate   |
|    |    |       |                   |         | Housekeeping       |
|    |    |       |                   |         | Data - Full Scan   |
|    |    |       |                   |         | Mode               |
+----+----+-------+-------------------+---------+--------------------+
| 2  | 1  | 340   | GIRD Instrument   | 67      | HSB Low Rate       |
|    |    |       |                   |         | Housekeeping Data  |
+----+----+-------+-------------------+---------+--------------------+
| 2  | 1  | 394   | GIRD Instrument   | 256     | AIRS Standard      |
|    |    |       |                   |         | Low-Rate 1553B     |
|    |    |       |                   |         | Housekeeping Data  |
|    |    |       |                   |         | Packet #1          |
+----+----+-------+-------------------+---------+--------------------+
| 2  | 1  | 395   | GIRD Instrument   | 256     | AIRS Standard      |
|    |    |       |                   |         | Low-Rate 1553B     |
|    |    |       |                   |         | Housekeeping Data  |
|    |    |       |                   |         | Packet #2          |
+----+----+-------+-------------------+---------+--------------------+
| 2  | 1  | 396   | GIRD Instrument   | 256     | AIRS Flexible      |
|    |    |       |                   |         | Low-Rate 1553B     |
|    |    |       |                   |         | Housekeeping       |
|    |    |       |                   |         | data - Packet \# 1 |
+----+----+-------+-------------------+---------+--------------------+
| 2  | 1  | 397   | GIRD Instrument   | 256     | AIRS Flexible      |
|    |    |       |                   |         | Low-Rate 1553B     |
|    |    |       |                   |         | Housekeeping       |
|    |    |       |                   |         | Data - Packet \# 2 |
+----+----+-------+-------------------+---------+--------------------+

\* Packet Size (in octets) = CCSDS-defined Packet Length + 7.

[]{#__RefHeading___Toc519937833 .anchor}Table B-3A. S-Band SN Mode 4.096
Kbps Nominal Telemetry Packets\
(Packet List 2)

+------+------+---------------------+---------+----------------------+
| VCID | APID | Packet Format Type  | Packet  | Contents             |
|      |      |                     | Size\*  |                      |
|      |      |                     |         |                      |
|      |      |                     | (incl.  |                      |
|      |      |                     | Hdrs)   |                      |
|      |      |                     |         |                      |
|      |      |                     | (       |                      |
|      |      |                     | Octets) |                      |
+======+======+=====================+=========+======================+
| 2    | 518  | Spacecraft Bus      | 65      | S/C ISC -- FT 11     |
|      |      | Telemetry           |         |                      |
+------+------+---------------------+---------+----------------------+
| 2    | 519  | Spacecraft Bus      | 123     | S/C ISC -- FT 12     |
|      |      | Telemetry           |         |                      |
+------+------+---------------------+---------+----------------------+
| 2    | 520  | Spacecraft Bus      | 204     | S/C ISC -- FT 13     |
|      |      | Telemetry           |         |                      |
+------+------+---------------------+---------+----------------------+
| 2    | 521  | Spacecraft Bus      | 37      | S/C ISC -- FT 14     |
|      |      | Telemetry           |         |                      |
+------+------+---------------------+---------+----------------------+
| 2    | 636  | Spacecraft Bus      | 20 -    | S/C ISC Memory Dump# |
|      |      | Telemetry           | 256     |                      |
+------+------+---------------------+---------+----------------------+
| 2    | 673  | Spacecraft Bus      | 18      | S/C PC -- FT 10      |
|      |      | Telemetry           |         |                      |
+------+------+---------------------+---------+----------------------+
| 2    | 675  | Spacecraft Bus      | 161     | S/C PC -- FT 12      |
|      |      | Telemetry           |         |                      |
+------+------+---------------------+---------+----------------------+
| 2    | 676  | Spacecraft Bus      | 194     | S/C PC -- FT 13      |
|      |      | Telemetry           |         |                      |
+------+------+---------------------+---------+----------------------+
| 2    | 677  | Spacecraft Bus      | 174     | S/C PC -- FT 14      |
|      |      | Telemetry           |         |                      |
+------+------+---------------------+---------+----------------------+
| 2    | 678  | Spacecraft Bus      | 151     | S/C PC -- FT 11      |
|      |      | Telemetry           |         |                      |
+------+------+---------------------+---------+----------------------+
| 2    | 791  | Spacecraft Bus      | 20 -    | S/C PC Memory Dump#  |
|      |      | Telemetry           | 256     |                      |
+------+------+---------------------+---------+----------------------+
| 2    | 820  | Spacecraft Bus      | 239     | S/C GNCC -- FT 2     |
|      |      | Telemetry           |         |                      |
+------+------+---------------------+---------+----------------------+
| 2    | 821  | Spacecraft Bus      | 246     | S/C GNCC -- FT 3     |
|      |      | Telemetry           |         |                      |
+------+------+---------------------+---------+----------------------+
| 2    | 823  | Spacecraft Bus      | 147     | S/C GNCC -- FT 5     |
|      |      | Telemetry           |         |                      |
+------+------+---------------------+---------+----------------------+
| 2    | 824  | Spacecraft Bus      | 122     | S/C GNCC -- FT 6     |
|      |      | Telemetry           |         |                      |
+------+------+---------------------+---------+----------------------+
| 2    | 825  | Spacecraft Bus      | 252     | S/C GNCC -- FT 7     |
|      |      | Telemetry           |         |                      |
+------+------+---------------------+---------+----------------------+
| 2    | 829  | Spacecraft Bus      | 142     | S/C GNCC -- FT 11    |
|      |      | Telemetry           |         |                      |
+------+------+---------------------+---------+----------------------+
| 2    | 830  | Spacecraft Bus      | 222     | S/C GNCC -- FT 12    |
|      |      | Telemetry           |         |                      |
+------+------+---------------------+---------+----------------------+
| 2    | 831  | Spacecraft Bus      | 186     | S/C GNCC -- FT 13    |
|      |      | Telemetry           |         |                      |
+------+------+---------------------+---------+----------------------+
| 2    | 930  | Spacecraft Bus      | 20 -    | S/C GNCC Memory      |
|      |      | Telemetry           | 256     | Dump#                |
+------+------+---------------------+---------+----------------------+
| 2    | 933  | Spacecraft Bus      | 155     | S/C GNCC -- FT 19    |
|      |      | Telemetry           |         |                      |
+------+------+---------------------+---------+----------------------+
| 2    | 982  | Spacecraft Bus      | 135     | S/C CTC (On-line) -- |
|      |      | Telemetry           |         | FT 9                 |
+------+------+---------------------+---------+----------------------+
| 2    | 983  | Spacecraft Bus      | 132     | S/C CTC (On-line) -- |
|      |      | Telemetry           |         | FT 10                |
+------+------+---------------------+---------+----------------------+
| 2    | 984  | Spacecraft Bus      | 153     | S/C CTC (On-line) -- |
|      |      | Telemetry           |         | FT 11                |
+------+------+---------------------+---------+----------------------+
| 2    | 985  | Spacecraft Bus      | 149     | S/C CTC (On-line) -- |
|      |      | Telemetry           |         | FT 12                |
+------+------+---------------------+---------+----------------------+
| 2    | 1000 | Spacecraft Bus      | 50      | S/C CTC (On-Line) -- |
|      |      | Telemetry           |         | FT 14\               |
|      |      |                     |         | GIRD/GIIS Times      |
+------+------+---------------------+---------+----------------------+
| 2    | 1101 | Spacecraft Bus      | 20 -    | S/C CTC (On-Line)    |
|      |      | Telemetry           | 256     | Memory Dump#         |
+------+------+---------------------+---------+----------------------+
| 2    | 1128 | Spacecraft Bus      | 72      | S/C CTC (Off-line)   |
|      |      | Telemetry           |         | -- FT 13             |
+------+------+---------------------+---------+----------------------+
| 2    | 1136 | Spacecraft Bus      | 20 -    | S/C CTC (Off-Line)   |
|      |      | Telemetry           | 256     | Memory Dump#         |
+------+------+---------------------+---------+----------------------+
| 2    | 1150 | SUROM/TIE Telemetry | 38      | TIE Status           |
+------+------+---------------------+---------+----------------------+
| 2    | 114  | GIRD Instrument     | 79      | MODIS Low Rate       |
|      |      |                     |         | Housekeeping Data    |
+------+------+---------------------+---------+----------------------+
| 2    | 140  | GIRD Instrument     | 271     | CERES +Y Aft Low     |
|      |      |                     |         | Rate Housekeeping    |
|      |      |                     |         | Data                 |
+------+------+---------------------+---------+----------------------+

\* Packet Size (in octets) = CCSDS-defined Packet Length + 7.

\# Memory dumps can be accommodated only if other APIDs are stopped
while the dump is taking place.

Table B-3A. S-Band SN Mode 4.096 Kbps Nominal Telemetry Packets\
(Packet List 2 -- Cont'd)

+-----+-------+----------------------+---------+----------------------+
| V   | APID  | Packet Format Type   | Packet  | Contents             |
| CID |       |                      | Size\*  |                      |
|     |       |                      |         |                      |
|     |       |                      | (incl.  |                      |
|     |       |                      | Hdrs)   |                      |
|     |       |                      |         |                      |
|     |       |                      | (       |                      |
|     |       |                      | Octets) |                      |
+=====+=======+======================+=========+======================+
| 2   | 156   | GIRD Instrument      | 271     | CERES -Y Fore Low    |
|     |       |                      |         | Rate Housekeeping    |
|     |       |                      |         | Data                 |
+-----+-------+----------------------+---------+----------------------+
| 2   | 220   | GIRD Instrument      | 127     | AMSR-E Low Rate      |
|     |       |                      |         | Housekeeping Data    |
+-----+-------+----------------------+---------+----------------------+
| 2   | 264   | GIRD Instrument      | 162     | AMSU-A1 Low Rate     |
|     |       |                      |         | Housekeeping Data -  |
|     |       |                      |         | No Mode              |
+-----+-------+----------------------+---------+----------------------+
| 2   | 265   | GIRD Instrument      | 162     | AMSU-A1 Low Rate     |
|     |       |                      |         | Housekeeping Data -  |
|     |       |                      |         | Staring Mode         |
+-----+-------+----------------------+---------+----------------------+
| 2   | 266   | GIRD Instrument      | 162     | AMSU-A1 Low Rate     |
|     |       |                      |         | Housekeeping Data -  |
|     |       |                      |         | Full Scan Mode       |
+-----+-------+----------------------+---------+----------------------+
| 2   | 296   | GIRD Instrument      | 88      | AMSU-A2 Low Rate     |
|     |       |                      |         | Housekeeping Data -  |
|     |       |                      |         | No Mode              |
+-----+-------+----------------------+---------+----------------------+
| 2   | 297   | GIRD Instrument      | 88      | AMSU-A2 Low Rate     |
|     |       |                      |         | Housekeeping Data -  |
|     |       |                      |         | Staring Mode         |
+-----+-------+----------------------+---------+----------------------+
| 2   | 298   | GIRD Instrument      | 88      | AMSU-A2 Low Rate     |
|     |       |                      |         | Housekeeping Data -  |
|     |       |                      |         | Full Scan Mode       |
+-----+-------+----------------------+---------+----------------------+
| 2   | 340   | GIRD Instrument      | 67      | HSB Low Rate         |
|     |       |                      |         | Housekeeping Data    |
+-----+-------+----------------------+---------+----------------------+
| 2   | 394   | GIRD Instrument      | 256     | AIRS Standard        |
|     |       |                      |         | Low-Rate 1553B       |
|     |       |                      |         | Housekeeping Data    |
|     |       |                      |         | Packet #1            |
+-----+-------+----------------------+---------+----------------------+
| 2   | 395   | GIRD Instrument      | 256     | AIRS Standard        |
|     |       |                      |         | Low-Rate 1553B       |
|     |       |                      |         | Housekeeping Data    |
|     |       |                      |         | Packet #2            |
+-----+-------+----------------------+---------+----------------------+
| 2   | 396   | GIRD Instrument      | 256     | AIRS Flexible        |
|     |       |                      |         | Low-Rate 1553B       |
|     |       |                      |         | Housekeeping data -  |
|     |       |                      |         | Packet \# 1          |
+-----+-------+----------------------+---------+----------------------+
| 2   | 397   | GIRD Instrument      | 256     | AIRS Flexible        |
|     |       |                      |         | Low-Rate 1553B       |
|     |       |                      |         | Housekeeping Data -  |
|     |       |                      |         | Packet \# 2          |
+-----+-------+----------------------+---------+----------------------+

\* Packet Size (in octets) = CCSDS-defined Packet Length + 7.

[]{#__RefHeading___Toc519937835 .anchor}Table B-3B. S-Band SN Mode 4.096
Kbps Engineering Telemetry Packets\
(Packet List 3)

+-------+------+---------------------+---------+----------------------+
| VCID  | APID | Packet Format Type  | Packet  | Contents             |
|       |      |                     | Size\*  |                      |
|       |      |                     |         |                      |
|       |      |                     | (incl.  |                      |
|       |      |                     | Hdr)    |                      |
|       |      |                     |         |                      |
|       |      |                     | (       |                      |
|       |      |                     | Octets) |                      |
+=======+======+=====================+=========+======================+
| 2     | 484  | SUROM/TIE Telemetry | 160     | S/C ISC "A" SUROM    |
+-------+------+---------------------+---------+----------------------+
| 2     | 487  | SUROM/TIE Telemetry | 160     | S/C ISC "B" SUROM    |
+-------+------+---------------------+---------+----------------------+
| 2     | 490  | SUROM/TIE Telemetry | 160     | S/C PC "A" SUROM     |
+-------+------+---------------------+---------+----------------------+
| 2     | 493  | SUROM/TIE Telemetry | 160     | S/C PC "B" SUROM     |
+-------+------+---------------------+---------+----------------------+
| 2     | 496  | SUROM/TIE Telemetry | 160     | S/C GNCC "A" SUROM   |
+-------+------+---------------------+---------+----------------------+
| 2     | 499  | SUROM/TIE Telemetry | 160     | S/C GNCC "B" SUROM   |
+-------+------+---------------------+---------+----------------------+
| 2     | 502  | SUROM/TIE Telemetry | 160     | S/C CTC "A" SUROM    |
+-------+------+---------------------+---------+----------------------+
| 2     | 505  | SUROM/TIE Telemetry | 160     | S/C CTC "B" SUROM    |
+-------+------+---------------------+---------+----------------------+
| 2     | 518  | Spacecraft Bus      | 65      | S/C ISC -- FT 11     |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 519  | Spacecraft Bus      | 123     | S/C ISC -- FT 12     |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 520  | Spacecraft Bus      | 204     | S/C ISC -- FT 13     |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 521  | Spacecraft Bus      | 37      | S/C ISC -- FT 14     |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 636  | Spacecraft Bus      | 20 -    | S/C ISC Memory Dump  |
|       |      | Telemetry           | 256     |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 673  | Spacecraft Bus      | 18      | S/C PC -- FT 10      |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 675  | Spacecraft Bus      | 161     | S/C PC -- FT 12      |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 676  | Spacecraft Bus      | 194     | S/C PC -- FT 13      |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 677  | Spacecraft Bus      | 174     | S/C PC -- FT 14      |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 678  | Spacecraft Bus      | 151     | S/C PC -- FT 11      |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 791  | Spacecraft Bus      | 20 -    | S/C PC Memory Dump   |
|       |      | Telemetry           | 256     |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 818  | Spacecraft Bus      | 160     | S/C GNCC -- FT 0     |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 819  | Spacecraft Bus      | 82      | S/C GNCC -- FT 1     |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 820  | Spacecraft Bus      | 239     | S/C GNCC -- FT 2     |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 821  | Spacecraft Bus      | 246     | S/C GNCC -- FT 3     |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 822  | Spacecraft Bus      | 162     | S/C GNCC -- FT 4     |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 823  | Spacecraft Bus      | 147     | S/C GNCC -- FT 5     |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 824  | Spacecraft Bus      | 122     | S/C GNCC -- FT 6     |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 825  | Spacecraft Bus      | 252     | S/C GNCC -- FT 7     |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 826  | Spacecraft Bus      | 250     | S/C GNCC -- FT 8     |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 827  | Spacecraft Bus      | 250     | S/C GNCC -- FT 9     |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 828  | Spacecraft Bus      | 212     | S/C GNCC -- FT 10    |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 829  | Spacecraft Bus      | 142     | S/C GNCC -- FT 11    |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 830  | Spacecraft Bus      | 222     | S/C GNCC -- FT 12    |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 831  | Spacecraft Bus      | 186     | S/C GNCC -- FT 13    |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 832  | Spacecraft Bus      | 226     | S/C GNCC -- FT 14    |
|       |      | Telemetry           |         |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 930  | Spacecraft Bus      | 20 -    | S/C GNCC Memory Dump |
|       |      | Telemetry           | 256     |                      |
+-------+------+---------------------+---------+----------------------+
| 2     | 982  | Spacecraft Bus      | 135     | S/C CTC (On-line) -- |
|       |      | Telemetry           |         | FT 9                 |
+-------+------+---------------------+---------+----------------------+
| 2     | 983  | Spacecraft Bus      | 132     | S/C CTC (On-line) -- |
|       |      | Telemetry           |         | FT 10                |
+-------+------+---------------------+---------+----------------------+
| 2     | 984  | Spacecraft Bus      | 153     | S/C CTC (On-line) -- |
|       |      | Telemetry           |         | FT 11                |
+-------+------+---------------------+---------+----------------------+
| 2     | 985  | Spacecraft Bus      | 149     | S/C CTC (On-line) -- |
|       |      | Telemetry           |         | FT 12                |
+-------+------+---------------------+---------+----------------------+
| 2     | 1000 | Spacecraft Bus      | 50      | S/C CTC (On-Line) -- |
|       |      | Telemetry           |         | FT 14\               |
|       |      |                     |         | GIRD/GIIS Times      |
+-------+------+---------------------+---------+----------------------+
| 2     | 1101 | Spacecraft Bus      | 20 -    | S/C CTC (On-Line)    |
|       |      | Telemetry           | 256     | Memory Dump          |
+-------+------+---------------------+---------+----------------------+
| 2     | 1128 | Spacecraft Bus      | 72      | S/C CTC (Off-line)   |
|       |      | Telemetry           |         | -- FT 13             |
+-------+------+---------------------+---------+----------------------+
| 2     | 1136 | Spacecraft Bus      | 20 -    | S/C CTC (Off-Line)   |
|       |      | Telemetry           | 256     | Memory Dump          |
+-------+------+---------------------+---------+----------------------+
| 2     | 1150 | SUROM/TIE Telemetry | 38      | TIE                  |
+-------+------+---------------------+---------+----------------------+

\* Packet Size (in octets) = CCSDS-defined Packet Length + 7.

[]{#__RefHeading___Toc519937836 .anchor}Table B-3C. S-Band SN Mode 4.096
Kbps Launch and Ascent Telemetry Packets\
(Packet List 2)

+-------+-------+--------------------+---------+----------------------+
| VCID  | APID  | Packet Format Type | Packet  | Contents             |
|       |       |                    | Size\*  |                      |
|       |       |                    |         |                      |
|       |       |                    | (incl.  |                      |
|       |       |                    | Hdrs)   |                      |
|       |       |                    |         |                      |
|       |       |                    | (       |                      |
|       |       |                    | Octets) |                      |
+=======+=======+====================+=========+======================+
| 2     | 518   | Spacecraft Bus     | 65      | S/C ISC -- FT 11     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 519   | Spacecraft Bus     | 123     | S/C ISC -- FT 12     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 520   | Spacecraft Bus     | 204     | S/C ISC -- FT 13     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 521   | Spacecraft Bus     | 37      | S/C ISC -- FT 14     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 636   | Spacecraft Bus     | 20 -    | S/C ISC Memory Dump# |
|       |       | Telemetry          | 256     |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 673   | Spacecraft Bus     | 18      | S/C PC -- FT 10      |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 675   | Spacecraft Bus     | 161     | S/C PC -- FT 12      |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 676   | Spacecraft Bus     | 194     | S/C PC -- FT 13      |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 677   | Spacecraft Bus     | 174     | S/C PC -- FT 14      |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 678   | Spacecraft Bus     | 151     | S/C PC -- FT 11      |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 791   | Spacecraft Bus     | 20 -    | S/C PC Memory Dump#  |
|       |       | Telemetry          | 256     |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 818   | Spacecraft Bus     | 160     | S/C GNCC -- FT 0     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 819   | Spacecraft Bus     | 82      | S/C GNCC -- FT 1     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 820   | Spacecraft Bus     | 239     | S/C GNCC -- FT 2     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 821   | Spacecraft Bus     | 246     | S/C GNCC -- FT 3     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 822   | Spacecraft Bus     | 162     | S/C GNCC -- FT 4     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 823   | Spacecraft Bus     | 147     | S/C GNCC -- FT 5     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 824   | Spacecraft Bus     | 122     | S/C GNCC -- FT 6     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 825   | Spacecraft Bus     | 252     | S/C GNCC -- FT 7     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 826   | Spacecraft Bus     | 250     | S/C GNCC -- FT 8     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 827   | Spacecraft Bus     | 250     | S/C GNCC -- FT 9     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 828   | Spacecraft Bus     | 212     | S/C GNCC -- FT 10    |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 829   | Spacecraft Bus     | 142     | S/C GNCC -- FT 11    |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 830   | Spacecraft Bus     | 222     | S/C GNCC -- FT 12    |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 831   | Spacecraft Bus     | 186     | S/C GNCC -- FT 13    |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 832   | Spacecraft Bus     | 226     | S/C GNCC -- FT 14    |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 930   | Spacecraft Bus     | 20 -    | S/C GNCC Memory      |
|       |       | Telemetry          | 256     | Dump#                |
+-------+-------+--------------------+---------+----------------------+
| 2     | 982   | Spacecraft Bus     | 135     | S/C CTC (On-line) -- |
|       |       | Telemetry          |         | FT 9                 |
+-------+-------+--------------------+---------+----------------------+
| 2     | 983   | Spacecraft Bus     | 132     | S/C CTC (On-line) -- |
|       |       | Telemetry          |         | FT 10                |
+-------+-------+--------------------+---------+----------------------+
| 2     | 984   | Spacecraft Bus     | 153     | S/C CTC (On-line) -- |
|       |       | Telemetry          |         | FT 11                |
+-------+-------+--------------------+---------+----------------------+
| 2     | 985   | Spacecraft Bus     | 149     | S/C CTC (On-line) -- |
|       |       | Telemetry          |         | FT 12                |
+-------+-------+--------------------+---------+----------------------+
| 2     | 1000  | Spacecraft Bus     | 50      | S/C CTC (On-Line) -- |
|       |       | Telemetry          |         | FT 14\               |
|       |       |                    |         | GIRD/GIIS Times      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 1101  | Spacecraft Bus     | 20 -    | S/C CTC (On-Line)    |
|       |       | Telemetry          | 256     | Memory Dump#         |
+-------+-------+--------------------+---------+----------------------+
| 2     | 1128  | Spacecraft Bus     | 72      | S/C CTC (Off-line)   |
|       |       | Telemetry          |         | -- FT 13             |
+-------+-------+--------------------+---------+----------------------+
| 2     | 1136  | Spacecraft Bus     | 20 -    | S/C CTC (Off-Line)   |
|       |       | Telemetry          | 256     | Memory Dump#         |
+-------+-------+--------------------+---------+----------------------+
| 2     | 1150  | SUROM/TIE          | 38      | TIE Status           |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 220   | GIRD Instrument    | 127     | AMSR-E Low Rate      |
|       |       |                    |         | Housekeeping Data    |
+-------+-------+--------------------+---------+----------------------+

\* Packet Size (in octets) = CCSDS-defined Packet Length + 7.

\# Memory dumps can be accommodated only if other APIDs are stopped
while the dump is taking place.

[]{#__RefHeading___Toc519937837 .anchor}Table B-4A. S-Band SN Mode 1.024
Kbps Survival/Safe Telemetry Packets\
(Packet List 0)

+-------+-------+--------------------+---------+----------------------+
| VCID  | APID  | Packet Format      | Packet  | Contents             |
|       |       |                    | Size\*  |                      |
|       |       |                    |         |                      |
|       |       |                    | (incl.  |                      |
|       |       |                    | Hdrs)   |                      |
|       |       |                    |         |                      |
|       |       |                    | (       |                      |
|       |       |                    | Octets) |                      |
+=======+=======+====================+=========+======================+
| 2     | 518   | Spacecraft Bus     | 65      | S/C ISC -- FT 11     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 519   | Spacecraft Bus     | 123     | S/C ISC -- FT 12     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 520   | Spacecraft Bus     | 204     | S/C ISC -- FT 13     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 521   | Spacecraft Bus     | 37      | S/C ISC -- FT 14     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 673   | Spacecraft Bus     | 18      | S/C PC -- FT 10      |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 675   | Spacecraft Bus     | 161     | S/C PC -- FT 12      |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 676   | Spacecraft Bus     | 194     | S/C PC -- FT 13      |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 677   | Spacecraft Bus     | 174     | S/C PC -- FT 14      |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 678   | Spacecraft Bus     | 151     | S/C PC -- FT 11      |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 818   | Spacecraft Bus     | 160     | S/C GNCC -- FT 0     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 819   | Spacecraft Bus     | 82      | S/C GNCC -- FT 1     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 820   | Spacecraft Bus     | 239     | S/C GNCC -- FT 2     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 821   | Spacecraft Bus     | 246     | S/C GNCC -- FT 3     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 823   | Spacecraft Bus     | 147     | S/C GNCC -- FT 5     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 824   | Spacecraft Bus     | 122     | S/C GNCC -- FT 6     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 825   | Spacecraft Bus     | 252     | S/C GNCC -- FT 7     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 829   | Spacecraft Bus     | 142     | S/C GNCC -- FT 11    |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 830   | Spacecraft Bus     | 222     | S/C GNCC -- FT 12    |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 831   | Spacecraft Bus     | 186     | S/C GNCC -- FT 13    |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 982   | Spacecraft Bus     | 135     | S/C CTC (On-line) -- |
|       |       | Telemetry          |         | FT 9                 |
+-------+-------+--------------------+---------+----------------------+
| 2     | 983   | Spacecraft Bus     | 132     | S/C CTC (On-line) -- |
|       |       | Telemetry          |         | FT 10                |
+-------+-------+--------------------+---------+----------------------+
| 2     | 984   | Spacecraft Bus     | 153     | S/C CTC (On-line) -- |
|       |       | Telemetry          |         | FT 11                |
+-------+-------+--------------------+---------+----------------------+
| 2     | 985   | Spacecraft Bus     | 149     | S/C CTC (On-line) -- |
|       |       | Telemetry          |         | FT 12                |
+-------+-------+--------------------+---------+----------------------+
| 2     | 1000  | Spacecraft Bus     | 50      | S/C CTC (On-Line) -- |
|       |       | Telemetry          |         | FT 14\               |
|       |       |                    |         | GIRD/GIIS Times      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 1128  | Spacecraft Bus     | 72      | S/C CTC (Off-line)   |
|       |       | Telemetry          |         | -- FT 13             |
+-------+-------+--------------------+---------+----------------------+
| 2     | 1150  | SUROM/TIE          | 38      | TIE Status           |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+

\* Packet Size (in octets) = CCSDS-defined Packet Length + 7.

[]{#__RefHeading___Toc519937838 .anchor}Table B-4B. S-Band SN Mode 1.024
Kbps Launch and Ascent Telemetry Packets\
(Packet List 3)

+-------+-------+--------------------+---------+----------------------+
| VCID  | APID  | Packet Format Type | Packet  | Contents             |
|       |       |                    | Size\*  |                      |
|       |       |                    |         |                      |
|       |       |                    | (incl.  |                      |
|       |       |                    | Hdrs)   |                      |
|       |       |                    |         |                      |
|       |       |                    | (       |                      |
|       |       |                    | Octets) |                      |
+=======+=======+====================+=========+======================+
| 2     | 518   | Spacecraft Bus     | 65      | S/C ISC -- FT 11     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 519   | Spacecraft Bus     | 123     | S/C ISC -- FT 12     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 520   | Spacecraft Bus     | 204     | S/C ISC -- FT 13     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 521   | Spacecraft Bus     | 37      | S/C ISC -- FT 14     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 636   | Spacecraft Bus     | 20 -    | S/C ISC Memory Dump# |
|       |       | Telemetry          | 256     |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 675   | Spacecraft Bus     | 161     | S/C PC -- FT 12      |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 676   | Spacecraft Bus     | 194     | S/C PC -- FT 13      |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 677   | Spacecraft Bus     | 174     | S/C PC -- FT 14      |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 678   | Spacecraft Bus     | 151     | S/C PC -- FT 11      |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 791   | Spacecraft Bus     | 20 -    | S/C PC Memory Dump#  |
|       |       | Telemetry          | 256     |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 820   | Spacecraft Bus     | 239     | S/C GNCC -- FT 2     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 821   | Spacecraft Bus     | 246     | S/C GNCC -- FT 3     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 823   | Spacecraft Bus     | 147     | S/C GNCC -- FT 5     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 825   | Spacecraft Bus     | 252     | S/C GNCC -- FT 7     |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 829   | Spacecraft Bus     | 142     | S/C GNCC -- FT 11    |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 830   | Spacecraft Bus     | 222     | S/C GNCC -- FT 12    |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 831   | Spacecraft Bus     | 186     | S/C GNCC -- FT 13    |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 930   | Spacecraft Bus     | 20 -    | S/C GNCC Memory      |
|       |       | Telemetry          | 256     | Dump#                |
+-------+-------+--------------------+---------+----------------------+
| 2     | 933   | Spacecraft Bus     | 155     | S/C GNCC -- FT 19    |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 982   | Spacecraft Bus     | 135     | S/C CTC (On-line) -- |
|       |       | Telemetry          |         | FT 9                 |
+-------+-------+--------------------+---------+----------------------+
| 2     | 983   | Spacecraft Bus     | 132     | S/C CTC (On-line) -- |
|       |       | Telemetry          |         | FT 10                |
+-------+-------+--------------------+---------+----------------------+
| 2     | 984   | Spacecraft Bus     | 153     | S/C CTC (On-line) -- |
|       |       | Telemetry          |         | FT 11                |
+-------+-------+--------------------+---------+----------------------+
| 2     | 985   | Spacecraft Bus     | 149     | S/C CTC (On-line) -- |
|       |       | Telemetry          |         | FT 12                |
+-------+-------+--------------------+---------+----------------------+
| 2     | 1000  | Spacecraft Bus     | 50      | S/C CTC (On-Line) -- |
|       |       | Telemetry          |         | FT 14\               |
|       |       |                    |         | GIRD/GIIS Times      |
+-------+-------+--------------------+---------+----------------------+
| 2     | 1101  | Spacecraft Bus     | 20 -    | S/C CTC (On-Line)    |
|       |       | Telemetry          | 256     | Memory Dump#         |
+-------+-------+--------------------+---------+----------------------+
| 2     | 1128  | Spacecraft Bus     | 72      | S/C CTC (Off-line)   |
|       |       | Telemetry          |         | -- FT 13             |
+-------+-------+--------------------+---------+----------------------+
| 2     | 1136  | Spacecraft Bus     | 20 -    | S/C CTC (Off-Line)   |
|       |       | Telemetry          | 256     | Memory Dump#         |
+-------+-------+--------------------+---------+----------------------+
| 2     | 1150  | SUROM/TIE          | 38      | TIE Status           |
|       |       | Telemetry          |         |                      |
+-------+-------+--------------------+---------+----------------------+

\* Packet Size (in octets) = CCSDS-defined Packet Length + 7.

\# Memory dumps can be accommodated only if other APIDs are stopped
while the dump is taking place.

[]{#__RefHeading___Toc519937839 .anchor}Table B-5. X-band DB/DP Mode
15/150 Mbps Telemetry Packets

+-----+---------+---------------------+---------+---------------------+
| V   | APID    | Packet Format Type  | Packet  | Contents            |
| CID |         |                     | Size\*  |                     |
|     |         |                     |         |                     |
|     |         |                     | (incl.  |                     |
|     |         |                     | Hdrs)   |                     |
|     |         |                     |         |                     |
|     |         |                     | (       |                     |
|     |         |                     | Octets) |                     |
+=====+=========+=====================+=========+=====================+
| 3   | 957     | Spacecraft Bus      | 126     | GBAD 1.0 Sec Packet |
|     |         | Telemetry           |         |                     |
+-----+---------+---------------------+---------+---------------------+
| 3   | 958     | Spacecraft Bus      | 46      | GBAD 4.0 Sec Packet |
|     |         | Telemetry           |         |                     |
+-----+---------+---------------------+---------+---------------------+
| 3   | 959     | Spacecraft Bus      | 213     | GBAD 8.0 Sec Packet |
|     |         | Telemetry           |         |                     |
+-----+---------+---------------------+---------+---------------------+
| 3   | 2047    | SUROM/TIE Telemetry | V       | X-band Fill Packet  |
|     |         |                     | ariable |                     |
+-----+---------+---------------------+---------+---------------------+
| 5   | All     | Packet Format Types | Same    | Complete S-Band GN  |
|     | APIDs   | as in Table B-2     | packet  | Mode Spacecraft Bus |
|     | of      | Except for Reserved | sizes   | & Instrument        |
|     | Table   | Packets             | as      | Housekeeping        |
|     | B-2     |                     | Table   | Telemetry, i.e. All |
|     | Except  |                     | B-2     | Packets in Table    |
|     | for     |                     |         | B-2 Except for      |
|     | R       |                     |         | Reserved Packets    |
|     | eserved |                     |         |                     |
|     | Packets |                     |         |                     |
+-----+---------+---------------------+---------+---------------------+
| *   |         |                     |         |                     |
| *CE |         |                     |         |                     |
| RES |         |                     |         |                     |
| +Y  |         |                     |         |                     |
| Aft |         |                     |         |                     |
| INS |         |                     |         |                     |
| TRU |         |                     |         |                     |
| MEN |         |                     |         |                     |
| T** |         |                     |         |                     |
+-----+---------+---------------------+---------+---------------------+
| 10  | 141     | GIIS Instrument     | 6994    | Science Data        |
+-----+---------+---------------------+---------+---------------------+
| 10  | 142     | GIIS Instrument     | 6994    | Calibration Data    |
+-----+---------+---------------------+---------+---------------------+
| 10  | 143     | GIIS Instrument     | 6994    | Diagnostic Data     |
+-----+---------+---------------------+---------+---------------------+
| 10  | 144     | GIIS Instrument     | 6994    | Fixed Pattern       |
+-----+---------+---------------------+---------+---------------------+
| **C |         |                     |         |                     |
| ERE |         |                     |         |                     |
| S-Y |         |                     |         |                     |
| F   |         |                     |         |                     |
| ore |         |                     |         |                     |
| INS |         |                     |         |                     |
| TRU |         |                     |         |                     |
| MEN |         |                     |         |                     |
| T** |         |                     |         |                     |
+-----+---------+---------------------+---------+---------------------+
| 15  | 157     | GIIS Instrument     | 6994    | Science Data        |
+-----+---------+---------------------+---------+---------------------+
| 15  | 158     | GIIS Instrument     | 6994    | Calibration Data    |
+-----+---------+---------------------+---------+---------------------+
| 15  | 159     | GIIS Instrument     | 6994    | Diagnostic Data     |
+-----+---------+---------------------+---------+---------------------+
| 15  | 160     | GIIS Instrument     | 6994    | Fixed Pattern       |
+-----+---------+---------------------+---------+---------------------+

\* Packet Size (in octets) = CCSDS-defined Packet Length + 7.

Table B-5. X-band DB/DP Mode 15/150 Mbps Telemetry Packets (Cont'd)

+-----+---------+---------------------+---------+---------------------+
| **A |         |                     |         |                     |
| MSU |         |                     |         |                     |
| -A1 |         |                     |         |                     |
| INS |         |                     |         |                     |
| TRU |         |                     |         |                     |
| MEN |         |                     |         |                     |
| T** |         |                     |         |                     |
+-----+---------+---------------------+---------+---------------------+
| V   | APID    | Packet Format Type  | Packet  | Contents            |
| CID |         |                     | Size\*  |                     |
|     |         |                     |         |                     |
|     |         |                     | (incl.  |                     |
|     |         |                     | Hdrs)   |                     |
|     |         |                     |         |                     |
|     |         |                     | (       |                     |
|     |         |                     | Octets) |                     |
+-----+---------+---------------------+---------+---------------------+
| 20  | 257     | GIRD Instrument     | 162     | No Mode Data        |
+-----+---------+---------------------+---------+---------------------+
| 20  | 259     | GIRD Instrument     | 704     | Packet 1 - Staring  |
|     |         |                     |         | Mode Data- NADIR,   |
|     |         |                     |         | Warm Calibration,   |
|     |         |                     |         | Cold Calibration    |
+-----+---------+---------------------+---------+---------------------+
| 20  | 260     | GIRD Instrument     | 492     | Packet 2 - Staring  |
|     |         |                     |         | Mode Data - NADIR,  |
|     |         |                     |         | Warm Calibration,   |
|     |         |                     |         | Cold Calibration    |
+-----+---------+---------------------+---------+---------------------+
| 20  | 261     | GIRD Instrument     | 704     | Packet 1 - Full     |
|     |         |                     |         | Scan Mode Science   |
|     |         |                     |         | and Engineering     |
|     |         |                     |         | Data                |
+-----+---------+---------------------+---------+---------------------+
| 20  | 262     | GIRD Instrument     | 612     | Packet 2 - Full     |
|     |         |                     |         | Scan Mode Science   |
|     |         |                     |         | and Engineering     |
|     |         |                     |         | Data                |
+-----+---------+---------------------+---------+---------------------+
| **A |         |                     |         |                     |
| MSU |         |                     |         |                     |
| -A2 |         |                     |         |                     |
| INS |         |                     |         |                     |
| TRU |         |                     |         |                     |
| MEN |         |                     |         |                     |
| T** |         |                     |         |                     |
+-----+---------+---------------------+---------+---------------------+
| 25  | 288     | GIRD Instrument     | 88      | No Mode Data        |
+-----+---------+---------------------+---------+---------------------+
| 25  | 289     | GIRD Instrument     | 326     | Staring Mode Data   |
+-----+---------+---------------------+---------+---------------------+
| 25  | 290     | GIRD Instrument     | 350     | Full Scan Mode      |
|     |         |                     |         | Science and         |
|     |         |                     |         | Engineering Data    |
+-----+---------+---------------------+---------+---------------------+
| *   |         |                     |         |                     |
| *MO |         |                     |         |                     |
| DIS |         |                     |         |                     |
| INS |         |                     |         |                     |
| TRU |         |                     |         |                     |
| MEN |         |                     |         |                     |
| T** |         |                     |         |                     |
+-----+---------+---------------------+---------+---------------------+
| 30  | 64      | GIIS Instrument     | 642     | Science             |
|     |         |                     |         | Data/Day/Long       |
+-----+---------+---------------------+---------+---------------------+
| 30  | 64      | GIIS Instrument     | 276     | Science             |
|     |         |                     |         | Data/Night/Short    |
+-----+---------+---------------------+---------+---------------------+
| 30  | 64      | GIIS Instrument     | 642     | Engineering Data    |
+-----+---------+---------------------+---------+---------------------+
| 30  | 127     | GIIS Instrument     | 642 /   | Test Data,          |
|     |         |                     | 276     | Day/Night Mode      |
+-----+---------+---------------------+---------+---------------------+
| **A |         |                     |         |                     |
| IRS |         |                     |         |                     |
| INS |         |                     |         |                     |
| TRU |         |                     |         |                     |
| MEN |         |                     |         |                     |
| T** |         |                     |         |                     |
+-----+---------+---------------------+---------+---------------------+
| 35  | 404     | GIRD Instrument     | 4286    | Science Data - 90   |
|     |         |                     |         | scene footprint     |
|     |         |                     |         | packets per scan    |
|     |         |                     |         | cycle               |
+-----+---------+---------------------+---------+---------------------+
| 35  | 405     | GIRD Instrument     | 4286    | Calibration Data -  |
|     |         |                     |         | 4 space look        |
|     |         |                     |         | calibration packets |
|     |         |                     |         | per cycle           |
+-----+---------+---------------------+---------+---------------------+
| 35  | 406     | GIRD Instrument     | 4286    | Calibration Data -  |
|     |         |                     |         | 1 radiometric       |
|     |         |                     |         | calibration packet  |
|     |         |                     |         | per cycle           |
+-----+---------+---------------------+---------+---------------------+
| 35  | 407     | GIRD Instrument     | 4286    | Calibration Data -  |
|     |         |                     |         | 1 combined          |
|     |         |                     |         | (Spectral +VIS/NIR) |
|     |         |                     |         | calibration packets |
|     |         |                     |         | per scan/orbit      |
+-----+---------+---------------------+---------+---------------------+

\* Packet Size (in octets) = CCSDS-defined Packet Length + 7.

Table B-5. X-band DB/DP Mode 15/150 Mbps Telemetry Packets (Cont'd)

+-----+--------+--------------------+--------+-----------------------+
| V   | APID   | Packet Format Type | Packet | Contents              |
| CID |        |                    | Size\* |                       |
|     |        |                    |        |                       |
|     |        |                    | (incl. |                       |
|     |        |                    | Hdrs)  |                       |
|     |        |                    |        |                       |
|     |        |                    | (O     |                       |
|     |        |                    | ctets) |                       |
+=====+========+====================+========+=======================+
| 35  | 414    | GIRD Instrument    | 4286   | Standard High Rate    |
|     |        |                    |        | Engineering Data      |
|     |        |                    |        | Packet 1              |
+-----+--------+--------------------+--------+-----------------------+
| 35  | 415    | GIRD Instrument    | 4286   | Standard High Rate    |
|     |        |                    |        | Engineering Data      |
|     |        |                    |        | Packet 2              |
+-----+--------+--------------------+--------+-----------------------+
| 35  | 416    | GIRD Instrument    | 4286   | Flexible High Rate    |
|     |        |                    |        | Engineering Data      |
|     |        |                    |        | Packet 1              |
+-----+--------+--------------------+--------+-----------------------+
| 35  | 417    | GIRD Instrument    | 4286   | Flexible High Rate    |
|     |        |                    |        | Engineering Data      |
|     |        |                    |        | Packet 2              |
+-----+--------+--------------------+--------+-----------------------+
| 35  | 418,   | GIRD Instrument    | 4286   | Not used - Reserved   |
|     | 419    |                    |        |                       |
+-----+--------+--------------------+--------+-----------------------+
| **  |        |                    |        |                       |
| AMS |        |                    |        |                       |
| R-E |        |                    |        |                       |
| INS |        |                    |        |                       |
| TRU |        |                    |        |                       |
| MEN |        |                    |        |                       |
| T** |        |                    |        |                       |
+-----+--------+--------------------+--------+-----------------------+
| 40  | 402    | AMSR-E Science     | 1024   | Science and           |
|     |        |                    |        | Engineering Data      |
+-----+--------+--------------------+--------+-----------------------+
| **  |        |                    |        |                       |
| HSB |        |                    |        |                       |
| INS |        |                    |        |                       |
| TRU |        |                    |        |                       |
| MEN |        |                    |        |                       |
| T** |        |                    |        |                       |
+-----+--------+--------------------+--------+-----------------------+
| 45  | 342    | GIRD Instrument    | 665    | Science and           |
|     |        |                    |        | Engineering Data      |
+-----+--------+--------------------+--------+-----------------------+

\* Packet Size (in octets) = CCSDS-defined Packet Length + 7.

########### 

########### APPENDIX C ADDITIONAL HOUSEKEEPING DATA FOR SCIENCE DATA ANALYSIS

A subset of the spacecraft housekeeping data are needed for science data
analysis. They are sometimes referred to as "ancillary data". The Ground
Based Attitude Determination (GBAD) data satisfy this need in most
cases, in addition to providing data for ground attitude determination.
This Appendix documents requirements for additional housekeeping data
over and beyond the GBAD data to facilitate science data analysis:

##################### C.1 MODIS Requirements

Eight temperature telemetry points are required for MODIS:

1\. MOD_TP_AOPZBYRC - Aft optics lower end +Z temperature near cooler
mount

2\. MOD_TP_MENXHTSINK - Main electronics module temperature -X heat sink

3\. MOD_TP_MEPSRADIATOR - Main electronics module PS1, PS2 radiator area
temperature, inside side panel near radiator

4\. MOD_TP_MFOBBLKHD - Mainframe inside temperature: +Z mid point of aft
optics bulkhead

5\. MOD_TP_MFTOPBYKM1 - Mainframe inside temperature: top, by 1-axis KM1

6\. MOD_TP_MFTOPBYKM3 - Mainframe inside temperature: top, by 3-axis KM3

7\. MOD_TP_PCFAM_RADIATR - Fam temperature inside side panel near
radiator

8.  MOD_TP_PVSAMRADIATR - PV SAM radiator temperature inside side panel
    near radiator

##################### C.2 AIRS, AMSU-A and HSB Requirements

1\. Spacecraft State indicator

2.  S-band and X-band transmitters on/off status.

3.  S-band Transmitter RF Power

4\. Complete Passive Analog telemetry from AIRS and AMSU-A, and Active
Analog Telemetry from HSB, as listed in Paragraphs C.2.1, C.2.2 and
C.2.3 below.

##################### C.2.1 AIRS Passive Analog Telemetry

1.  Instrument Electronics Baseplate Temperature

2.  Instrument Electronics Baseplate Temperature

3.  Cooler Baseplate Temperature

4.  Cooler Baseplate Temperature

5.  Cooler Electronics Baseplate Temperature

6.  Cooler Electronics Baseplate Temperature

7.  Spectrometer Temperature

8.  Spectrometer Temperature

9.  Scan Head Housing Temperature

10. Scan Head Housing Temperature

##################### C.2.2 AMSU-A Passive Analog Telemetry

1.  A1-1 RF Shelf #1 Temperature

2.  A1-2 RF Shelf #1 Temperature

3.  A1-1 RF Shelf #2 Temperature

4.  A1-2 RF Shelf #2 Temperature

5.  A2 RF Shelf Temperature #1

6.  A2 RF Shelf Temperature #2

##################### C.2.3 HSB Active Analog Telemetry

1.  +12V (A) Secondary

2.  --12V (A) Secondary

3.  +15V (A) Secondary

4.  --15V (A) Secondary

5.  +8V (A) Secondary

6.  +5V (D) Secondary

7.  +5V (A) Secondary

8.  --5V (A) Secondary

9.  +5V Reference Secondary

10. ICE Temperature

11. MDE Temperature

12. PEU Temperature

13. PSU Temperature

14. Scan Motor Temperature

15. Scan Motor Current

16. Local Oscillator Temperature Ch 16

17. Local Oscillator Temperature Ch 17

18. Local Oscillator Temperature Ch18/19/20

########### APPENDIX D ACRONYMS

AA Active Analog

AB Active Bi-level

AIRS Atmospheric Infrared Sounder

AMSR-E Advanced Microwave Scanning Radiometer for EOS

AMSU-A Advanced Microwave Sounding Unit-A

APID Application Process Identifier

BC Bus Controller

BCH Bose-Chaudhuri-Hocquenghem

bps bits per second

CADU Channel Access Data Unit

CCSDS Consultative Committee for Space Data Systems

C&DH Command and Data Handling

C&DHS Command and Data Handling System

CDS CCSDS Day Segmented (Time Code)

CEI Contract End Item

CERES Clouds and the Earth's Radiant Energy System

CLCW Command Link Control Word

CLTU Command Link Transmission Unit

CMD Command

COMM Communications

COP Command Operations Procedure

C&T Command and Telemetry

CTC Command and Telemetry Controller

CUC CCSDS Unsegmented (Time Code)

CVCDU Coded Virtual Channel Data Unit

DB Direct Broadcast

DP Direct Playback

DS Discrete

ECF Error Control Field

EDOS EOS Data Operations System

EEPROM Electrically Erasable Programmable Read Only Memory

EOC EOS Operations Center

EOS Earth Observing System

EOSDIS Earth Observing System Data Interface System

EPGS EOS Polar Ground Stations

ESTMS EOC Spacecraft Time Management Software

FARM Frame Acceptance Reporting Mechanism

FDF Flight Dynamics Facility

FMU Formatter/Multiplexer Unit

FOP Frame Operation Procedure

fp Floating Point

FSW Flight Software

FT Format Table

FW Firmware

GBAD Ground Based Attitude Determination

GIIS General Instrument Interface Specification

GIRD General Interface Requirements Document

GN Ground Network

GN&C Guidance, Navigation, and Control

GNCC GN&C Controller

GSE Ground Support Equipment

GSFC Goddard Space Flight Center

HDR Header

H/K Housekeeping

HRC High Rate Channel

HRDL High Rate Data Link

HSB Humidity Sounder for Brazil

ICD Interface Control Document

ID Identifier/Identification

ISC Instrument Support Controller

Kbps Kilobits per second

LRC Low Rate Channel

LSB Least Significant Bit

LSH Least Significant Half

LSIO Low Speed Serial Input/Output

LSW Least Significant Word

LV Launch Vehicle

MA (TDRSS S-band) Multiple Access

MAP Multiplexer Access Point

Mbps Megabits Per Second

MODIS Moderate Resolution Imaging Spectroradiometer

M_PDU Multiplexing Protocol Data Unit

MSB Most Significant Bit

MSH Most Significant Half

MSW Most Significant Word

NA Not Applicable

NASA National Aeronautics and Space Administration

NOP No Operation

NRZ-L Non-Return to Zero-Level

NRZ-M Non-Return to Zero-Mark

OCF Operational Control Field

PA Passive Analog

PB Passive Bi-level

PC Power Controller

PCD Payload Correction Data

PCS Predefined Command Script

PGS Polar Ground Station

PLOP Physical Layer Operation Procedure

PMDB Project Master Database

PN Psuedorandom Noise

QL Quick Look

QPSK Quadrature Phase Shift Keying

RF Radio Frequency

RPM Revolution Per Minute

R-S Reed-Solomon

RT Remote Terminal

SC Spacecraft

SCID Spacecraft Identifier

SCS Stored Command Sequence

SCW Single Command Write

SD Serial Digital

SDM Serial Digital Magnitude

SHF Secondary Header Flag

SIO Serial Input/Output

SMA S‑band Multiple Access

SN Space Network

SOH State of Health

SPC Serial Processor of Control (Unit)

SPS Serial Processor of Sensor (Unit)

SSA S‑band Single Access

SSR Solid State Recorder

SUROM Start Up Read Only Memory

TAI International Atomic Time

TAXI Transparent Asynchronous Transmitter/Receiver Interface

TBD To Be Determined

TBR To Be Reviewed

TBS To Be Supplied

TC Telecommand

TDRS Tracking and Data Relay Satellite

TDRSS Tracking and Data Relay Satellite System

TIE Transponder Interface Electronics

TLM Telemetry

TMON Telemetry Monitor

USCCS User Spacecraft Clock Calibration System

USO Ultra Stable Oscillator

UTC Universal Time Coordinated

VC Virtual Channel

VCDU Virtual Channel Data Unit

VCID Virtual Channel Identifier

WPS Wallops Orbital Tracking Station