Jo

NASA

NIMBUS Observation Processing

System Requirements Document

#NG-13

ERB Master Archival

Tape Specification No. T134081

ERB MAT

May 1984

National Aeronautics and

Space Administration

Goddard Space Right Center

Greenbelt, Maryland 20771
NIMBUS-7

NIMBUS OBSERVATION PROCESSING SYSTEM (NOPS)

REQUIREMENTS DOCUMENT tNG-13

ERB MASTER ARCHIVAL TAPE

TAPE SPECIFICATION NO. T134081 ERB MAT

REVISION I

MAY, 1984

REVISED BY:

REVIEWED BY:

K^-<gi>^<3*^— / ' r I*A*SIST^^\^. jL>"N-»

Sheldon T. Nutter, Jr./«?(§fc:

Dr. Richar

SASC/NOPS ERG Project Manager

APPROVED BY:

Lonnie H. Bowlin

SASC/NOPS Program Manager

(05/84)

(05/84)

(05/84)

NOTE: This document was provided to Systems and Applied

Science s Corporatio n fo r review an d updat e a s

necessary.
TABLE OF CONTENTS

PAGE

ABSTRACT 1

I. Requirement Identification 5

II. Input Data Source 5

III. Operating Mode 5

IV. Gross Output Format 5

V. Standard Header 6

V.I General 7

V. 2 Standard Header Record (SHR) 7

V.3 Trailing Documentation File (TDF) 8

V. 4 Tape Duplication 11

V.5 Shipping Letters 11

VI. Data Record 16

VI-A Daily Summary Record 19

VI-B. Logical Data Record 23

VI-C. Orbital Summary Record 39

VII. Calibration Record/File 52

APPENDIX A. MAT Tape Length Estimate A-l
LIST OF TABLES

PAGE

TABLE V-l. NOPS Specification Numbering Code 12

TABLE V-2. Nimbus-7 Project Data Format Codes 14

TABLE VI-1. Instrument Temperatures and Voltage

Monitors 31

TABLE VI-2. ERB Odd Digital Words Format 35

TABLE VI-3. Spacecraft Status and Events 37

TABLE VI-4. Status Summary 45

TABLE VI-5. Statistics of Temperatures 47

LIST OF FIGURES

PAGE

FIGURE 1. Gross Tape Format of Year-1 and Year-2

MATS . 2

FIGURE 2. Gross Tape Format of a Typical Stacked

MAT 3

FIGURE 3. Data File Format for all MATS 4

FIGURE V-l. EBCDIC Tape Format . 13

FIGURE VI-1. ERB MAT Physical Record Format 18

FIGURE VI-2. ERB MAT Daily Summary Logical Record

Format 20

FIGURE VI-3. Logical Data Record Format ' 24

FIGURE VI-4. Logical Record Format for Orbital

Summary 40

FIGURE VII-1. ERB MAT Calibration Adjustment Table and

Record Format 53

11
Revision D; April 7, 1980 (RDH)

Calibration Adjustment Table (CAT) added.

Revision E; May 13, 1980 (RDH)

Updated CAT specs.

Revision F; July 22, 1981 (LHB)

Changed GHA from degrees to radians (Page 22).

Revision G; November 3, 1981 (SNR)

Tables VI-1, VI-4, and VI-5 added.

Revision H; November 4, 1982 (SNR)

Specified fill-value s for location errors and solar channels.

Also specified range of GHA values correctly and corrected the

numbering system of SUBFOV's (Page 22).

Revision I; April 17, 1984 (STN)

Added Trailing Documentation File (TDF) description. Also added

description of Stacked (multi-day) MAT which became effective at

start of Year-3.

111
ABSTRACT

ERB MAT tapes are generated by the ERB MATGEN software using the

IBM 3081 computer system operated by the Science and Applications

Computin g Center at Goddard Space Flight Center. All MATs are

9-track and MAT data will be in ascending time order. The gross

tape forma t for Nimbus Year-1 and Year-2 MATs is different from

the format of MATs starting with Year-3. MATs from the first two

years will contain one day's worth of data while all other MATs

will contain multiple day's worth of data stacked onto the tapes.

Each data fil e will represent one ERB instrument "ON" day. The

gross tape format for a Year-1 or Year-2 MAT is shown in Figure 1

and is summarized here:

• Tape density is 1600 BPI.

• File 1 contains a standard header, record written twice.

• File 2 contains one day's worth of data.

• File 3, the calibration file,' is the last file on the tape.

The gross tape forma t for stacked MATs starting with Year-3 is

shown in Figure 2 and is summarized as follows:

• Tape density is 6250 BPI.

• File 1 contains a standard header record written twice.

• Files 2 to N-2 will be data files that contain one day's

worth of data per file. Normally there will be three data

file s stacked onto a MAT, but a few tapes have only two data

files.

• File N-l is the calibration file.

• File N is the Trailing Documentation File (TDF).

An orbit data block is define d as beginning at one descending

node and endin g at the following descending node. However, the

data orbit numbe r is incremented at each ascending node such

that each orbit data block will contai n data fro m two data

orbits. Each record within the orbit data block and each orbit

data block from the beginning of the tape to the end of the tape

will contain data in ascendin g time order. Data will only be

writte n whe n ERB subsystem is "ON" and no duplicate data will be

written.

Each VIP frame of data occupies one logical data record. There

are up to two logical data records to every physical record.

Afte r all the Logical data records have been output, an 'Orbital

Summary logical record will be written . This record will

indicat e the end of an orbit data block. In the last orbit data

block of the day, a Daily Summary logical record will be written

afte r the Orbita l Summary logical record. Figure 3 shows the

data file format for all MATs.

-1-
EI

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-2-
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-3-
LOGICAL

DATA

RECORD

LOGICAL

DATA

RECORD

I

R

G

r

PHYSICAL

DATA

RECORD

I

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PHYSICAL \V PHYSICAL

DATA // DATA

RECORD NX^ RECORD

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RECORD

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RECORD

DAILY

SUMMARY

RECORD

E

0

F

OR

DAILY

SUMMARY

RECORD

ZERO

SUMMARY

RECORD

E

0

F

FIGURE 3. Data File Format for all MATs

-4-
I. REQUIREMENT IDENTIFICATION

ERB Master Archival Tape (MAT) Specification Number T134081.

II. INPUT DATA SOURCE

UFO-E (TU3011) .and ERB ILT (T123044).

III. OPERATING MODE

Data is available only when the instrument in "ON". When the ERB

Subsystem is "OFF", data records covering that time period will

not be available.

When the tape has covered one 24-hour period, the tape will be

terminated and a new tape initiated. The tape sequence number

will be incremented by one and the whole process restarted.

IV. GROSS OUTPUT FORMAT

Refer to Figure 1 and Figure 2.

-5-
V. STANDARD HEADER

All magnetic tapes used as interfaces within NOPS will require

some form of identification. A standardized series of records in

the initial fil e on each tape will be used and will be called a

NOPS Standard Header Pile. Some tapes used withi n a NOPS

facility , which do not pass an interface, will be exempt from

this requirement, although it is a recommended procedure.

The Standard Header will contain the specification number of the

tape generated. The interface specification numbering system is

shown in Table v-1.

Each Standard Header will be written in EBCDIC so that it can be

easily printed for quick identification of the tape. Figure V-1

shows the standard header format using 24-bit words.

Because of the real possibility of an original tape being damaged

in handlin g (resultin g in the loss of many computations) each

processing facility within NOPS will generate duplicate copies of

master tapes. These duplicates will be delivered to IPD for data

product generation or user copy generation and will be indicated

by the character 2 added to the sequence number in the Standard

Header. The "original will be indicated by the character 1 and

will be retained in a secure environmen t at the originating

facility . When IPD returns Copy No. 2 due to tape errors, a new

copy will be sent to IPD with the copy number incremented by 1

(No. 3).

IPD will include a shipping letter with every tape distributed.

The shippin g letter will be printed directly from the Standard

Header on the tape. In the case of copies made from tapes not

generated in IPD, the origina l tapes Standard Header will be

copied into a group of 126 characters in each record provided for

that purpose and normally left blank.

-6-
V.I GENERAL

All compute r compatible tapes (CCTs) that are used as interfaces

withi n NOPS , require some form of identification. This applies

to all CCT s tha t are currentl y define d by a NOPS tape

specification , and that are also used for distributio n or

archiving purposes.

In addition to definin g a "latest" product, data relating to

previous products that went into the maki-ng of the "latest"

product provides useful information when system problems occur.

The purpose of this revision to existing NOPS tape specifications

is to defin e a scheme that allows the recording of the genealogy

of a "latest" product, and in general, adheres to existing tape

documentation standards.

In brief, the system is as follows:

1) A documentatio n fil e that consists of a string of

physical records follows the data on any tape defined

by a current NOPS tape specification. This will be

referred to as a Trailing Documentation File (TDF), and

will be the last file on a tape when it exists.

2) The standard NOPS header file remains as defined, with

minor modifications to the Standard Header record that

reflect both the existence of a TDF and adherence to

the IPD standard for sequence numbers.

The followin g sections define the NOPS Standard Header records

and file , and the TDF. Data files as currently defined in NOPS

tape specification remain unchanged.

V.2 STANDARD HEADER RECORD (SHR)

The SHR will consist of one physical record that consists of five

logica l records of 126 EBCDIC characters. The first 126

characters will remain as previously defined with the exception

of CHARACTER 1, and those characters that define the sequence

numbe r (40-45) . CHARACTER 1 will contain an asterisk (*) and

serves to notif y all systems that a TDF is likely to follow the

main data file's and that the next logical record contains

informatio n relevant to complete identification. As of the

implementation date of this specification, all sequence numbers

will have the following form that is an IPD standard:*

*This does not apply to CZCS data. For CZCS data, Characters 40

to 45 represent a 6-digit sequence number.

-7-
CHARACTER 40

CHARACTERS 41-43

CHARACTER 44

CHARACTER 45

CHARACTER 47

The last digit of the year in which the data

were acquired.

Julian day of the year in which the data

were acquired.

Sequence number for this particular product

(usuall y a 1) (eg., CLDTs will have a 1 and

2, as there are 2 products per day).

The existing hyphen remains unless there is

a remake of the tape for any reason. In

this case, an ascending alpha character will

replace the hyphen , and the most recent

reasons for remake will be recorded in

logical record 4 of the header.

This will remain as a blank unless it is

needed to remove ambiguities in CHARACTER

40. This may occur if data are bein g

acquired on October 24, 1988.

This scheme will uniquel y identif y any tape

conjunctio n wit h the tape specification number,

and the subsystem identification.

whe n used in

the PDPC code,

The second logical record consistin g of 126 characters will

contain informatio n that is required to complete the history of

the product.

CHARACTERS 1-12 = Software program name and version number.

CHARACTERS 13-18

CHARACTERS 20-126

Program documentatio n reference number, if

it exists.

Use r define d comments tha t may be mor e

relevant to the use r tha n the preceding

ones.

The NOPS Standard Heade r File will continue to consist of two

records, the second bein g a duplicat e of the first. Logical

records 3 and 4 may be used for anything desired if no remake

information is required.*

*In the case of CZCS, these logical records are used to define

the genealogy of the image rather than the method of V.3.

-8-
The Standard Header will contain the following:

Two identical records (physical) of 630 characters (8-bits

each) followed by an End-Of-File (EOF).

The first 126 characters of the first record will consist

Of!

*NlMBUS-7bNOPSbSPECbNObT ( 1, 24 CHAR)

XXXXXX (6-Digit Spec Number) (25, 30 CHAR)

. SQ, NO. (31, 37 CHAR)

b o o

AIXXXXX (PDFC & 5-Digit Sequence Number) (38, 44 CHAR)

NOTE: If sequence number is zero, tape is not a finished

product (i.e., definitive ephemeris not used,

artificial VIP data, etc.).

-X (Copy Number 1 or 2)

I (Redo Character)

bYYYYb (4-Character Subsystem ID)

YYYY (Generation Facility ID)

,TObYYYY (4-Character Designation

° Facility ID)

bSTARTb!9XXbDDDbHHMMSS

(Start year, day of year, hours, minutes

and seconds)

(45, 46 CHAR)

( 47,

( 53,

( 57,

( 65,

52 CHAR)

56 CHAR)

64 CHAR)

86 CHAR)

(End data and time of data)

GEN.19XX. ODD, HHMMSS,

b o o b

(Date and time tape was generated)

( 87, 106 CHAR)

(107, 126 CHAR)

The second group of 126 characters will contain continuation

documentation of the original 126 characters when required.

For CZCS, Characters 40 to 45 are a 6-digit sequence number.

-9-
The third , fourth , and fift h groups of 126 characters each are

intended for the use of the Subsystem Analyst for furthe r

identification s of their data. They may contain blanks, EBCDIC,

BDC, or binary characters or zeros.

The second record in the file is a duplicate of the first record

of redundancy.

The PDFC codes are as defined in Table V-2.

EXAMPLE: An ERB MATRIX tape covering the month of February, 1979

is generated by SACC and sent to IPD for production of

contour maps on 16mm microfilm . The NOPS Standard

Header file on the tape that IPD receives would contain

two of the following records:

*NIMBUS-7, NOPS, SPEC, NO, T134031. SO. NO,

b b b b bo b

First day of time period

AA90321-2, ERB. . SACC, TO, IPD, START.1979.

b bb b b o o o

032b000432bTOb1979b059b235742bGENb

1979b104b094500bfollowed by 504 blanks

First day of time period may not be first data day in

the event of multiday-stacked products that are based

on an ILT week.

V.3 TRAILING DOCUMENTATION FILE (TDF)

The TDF will consist of all NOPS Standard Header records (nonduplicated ) that relate to products that have gone into the

makin g of the curren t product. Documentation records will be

sequenced in accordance with their access; that is, first in is

the first recorded. Every TDF is 630 bytes in length.

The first record of this file will serve to identify the file as

a TDF. This will be accomplished by placin g asterisk s in

CHARACTERS 1 to 10 followed by a NOPS TRAILER DOCUMENTATION FILE

FOR TAPE PRODUCT T [SPEC NO. (6 digits)] GENERATED ON ODD HH MM.

The exact spacing of this comment is noncritical as long as it is

less than 116 characters. The second physical record will be a

repeat of the header fil e NOPS Standard Header record for this

type wit h the proviso tha t data referring to the end-time are

correc t for the data set. Following physical records will be an

accumulation of TDFs of all input tapes. For those products that

requir e more than one tape, the TDF will appear on the last tape

only as well as the warning asterisk.

-10-
V.4 TAPE DUPLICATION

It has been determine d that the duplication of master tapes is

neithe r time nor cost effective , thus the requiremen t of

duplicatio n implied in the preceding specification is rescinded.

However, some tapes that requir e a great deal of effort to

produc e in terms of manpowe r and compute r time should be

duplicated.

If a redo is required due to tape errors or algorithm changes,

this will be noted both on the CCT (HEADE R C-45) and on the

canister.

V.5 SHIPPING LETTERS

IPD will include a shipping letter with every tape distributed.

The shippin g letter will be printed directly from the first 126

(or 138) characters of the first physical record of SHF. In the

event of copies made from CCTs that are not generated in IPD, a

new physical record reflecting IPD as the source and the Nimbus

experimente r to whom the tape is being sent as the destination,

will be added as the second record of the TDF. All existing

records in the TDF will be pushed down, but none will be lost.

This record should also replace those in the SHF.

-11-
TABLE V-l

NOPS SPECIFICATION NUMBERING CODE

TAPES: A six digit number prefixed with a T to denote TAPE

will be used.

X X X

Tape Description:

1=9 Trk 1600 BPI

2 = 9 Trk 800 BPI

3=7 Trk 800 BPI

4 = 7 Trk 556 BPI

5 = HOT (IPD)

6=9 Trk 6250 BPI

Tape number in sequence for

subsystem (code to be derived)

Destination Facility:

1 = NOCfa (Pre-NOPS)

2 = MDHS (NOPS)

3 = SACC

4 = IPDb

5 = LaRC

6 = NCAR

7 = NOAA

8 = OXFD

9 = LANN

Source Facility (Same code as

Destination Facility)

Subsystem

1 = ERB,

D

2 = SMMR

3 = THIR

4 = SAM2

5 = LIMS

6 = SBUV

7 = CZCS

8 = SAMS

9 = ILT.

-12-
STANDARD HEADER (PHYSICAL RECORD FORMAT)

8

9

10

13

14

15

16

17

18

19

20

21

22

29

36

42

84

126

168

210

MSB

24 22 20 18 16 14 12 10

LSB

2 1

* Nimbus - 7bNOPSbSPECbNO,T

(24 Characters)

SPEC NO. (6 Digits)

faSQbNOb (7 Characters)

PDFC CODE

5 Digit Sequence No. (5 Characters)

*For CZCS these characters (40-45) are a six digit

sequence & (includes Redo)

1 Char. Type Copy No. Blank Character

(4 Characters) SUBSYSTEM I.D.

Blank Character SOURCE FACILITY

(4 Characters)

(T) Character (0) Character

(2 Char.)

REDO CHARACTER

Blank Character

Blank Character

(4 Characters) DESTINATION FACILITY I.D.

(23 Characters)

START YEAR, DAY, HOURS, MINUTES, SECONDS

bSTARTb!9XXbDDDbHHMMSSb

(19 Characters)

END DATE AND TIME OF DATA *„ „••,-,. •

*Some Facilities may not

TOb19XXbDDDbHHMMSSb include end time in header

(20 Characters)

DATE AND TIME TAPE WAS GENERATED

HTSHV me n, = v = ~4-^ \ SW Program Name (1-12) Documentation (13-18)

BLANK (126 Characters) Comments (19-1261

BLANK (126 Characters

BLANK (126 Characters)

BLANK (126 Characters)

408

1003

2016

3024

4032

5040

FIGURE V-l. EBCDIC Tape Format

-13-
TABLE V-2.

NIMBUS- 7 PROJECT DATA FORMAT CODES , 1 AUG 81

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KOFC

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OSFE

onr*

lyTH

T3FJ

an i

SQZA

au

CAZC

uzo

ILU

CUE

ILU

COM

Lozr

OPZC

KAMA

BAtC

i an

WMO

0 CRN

L CSM

o om

MET

L CRN

S CM

L CSX

D UM

ILUE

STAKOARO

ILUE

ILUE

ILUE

ILUE

ILUE

ILAQC

ILUE

L U»

CU

TtL-OR

TTX-OI

CRET

CUT

/ C OBAN

/ L PINS

/ c Pit;:

/ 0 CiX

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/ o cs«

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/ TEun-/

/ BLUE

STA LAP;L

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/ o OP.N:

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/ n TAI:

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EXP UBU

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ETP LABEL

DP UfiO.

"t;":V.:«J (si - SEKSORS vxm UTISIOMS wiu MOC.

Vti'O CHAMCIS TO LABEL COLOtS NAT 8C MADE OEPEWIK

t PROCUSED IT HCTOCC AW CWIEO TO FILM IT 1PT OM AVAIUBILITT AM OUAMTITT.

^ fL.a'.HP Ci «ii»« *»» st(t»rr.s it 7tc»,

BOTCt LOAOIis SITLUTS FIRST TtAI OATA SIT OJB.T (If OCT 71 TMV 3 HOT 7»I

0*.tai.N*L TAPES wiU. l£ rt*Uft«OC0TO AICHIVAL.

OF

-14-
NIMBUS-7 PROJECT DATA FORMAT CODES

(Continued)

SENSOR TAPE ID PDFC CODE

Location ILT/ERB LA

ILT/SMMR LB

ILT/THIR LI

ILT/SAMII LD

ILT/LIMS LE

ILT/SBUV LF

ILT/CZCS LZ

ILT/SAMS LH

User UFO/ERB UA

UFO/SMMR UB

UFO/LIMS UE

UFO/SBUV UF

UFO/ILT UL

USER/SENSOR

1st CHARACTER SOURCE/SENSOR 2nd CHARACTER TAPE NUMBER

ERB A

SMMR B

THIR I

SAMII D

LIMS E

SBUV/TOMS F

CZCS Z

SAMS H

ILT L

UFO U

-15-
VI. DATA RECORD

There are three types of logical records in each data file of the

ERB MAT tape. Each fil e will begin with a data logical record

and continue on a one VIP major frame per one data logical record

basis until the end of the orbit data block or ERB S/S power is

turned off , whicheve r occurs first. After the end of the data

logical records, an orbital summary logical record will be

writte n followed by more orbit data blocks until a day's worth of

data have been writte n at whic h time a daily summary logical

record will be written, the rest of that physical record padded

out with zeroes, if necessary, and the file ended.

The forma t of the last physical record depends on the number of

logical data records (VIP frames per orbit) in the file.

The orbital summary record contains the peak solar irradiances

for Channels 1 through 10 as well as various quantities computed

for the orbital summary. All physical records, except standard

header records, will consist of 13,464 bytes of information.

Figur e VI-1 is the basic physical record format. Formats and

word descriptions for the thre e logical record formats are

presented in Subsections VI-A, VI-B, and VI-C.

The last sixteen bits of the physica l record is the checksum

word. Each 32-bit word output to tape is divided into two 16-bit

words and added with any overflow over sixteen bits added into

the LSB side of the summation word. The final summation word is

placed as the last word of the record as the checksum. An

interna l qualit y control program will check this number by

recomputin g what it has read in addition to other quality checks

to ensure a quality output product.

Whe n statistics for data are given, the order will be: minimum,

mean , maximum , standard deviation, and number of samples. When

only four statistics are given, the number of samples are omitted

and the order remains the same.

The order in which data are presented on the iMAT tape is given in

the parameter description.

For example , if the description were (5 statistics x 10 channels

x 16 bits = 800 bits) the words would be ordered as follows:

-16-
WORD

1 Minimum for Channel 1

2 Mean for Channel 1

3 Maximum for Channel 1

4 Standard Deviation of Channel 1

5 Number of Samples for Chanel 1

6 Minimum for Channel 2

7 Mean for Channel 2

10 Number of samples for Channel 2

46 Minimum for Channel 10

50 Standard Deviation for Channel 10

-17-
MSB

32 30 28 26 24 20

LSB

18 16 14 12 10 8 6 4 2

1682

1683

3364

3365

3366

1st LOGICAL RECORD

2nd LOGICAL RECORD

SPARES (48 BITS)

(.CAN BE DATA RECORD, ORBITAL

SUMMARY RECORD, OR DAILY

SUMMARY RECORD)

53,824

(CAN BE DATA RECORD

ORBITAL SUMMARY RECORD,DAILY

SUMMARY RECORD OR

ZERO PADDED)

CHECKSUM (16 BITS)

107,648

107,712

299236

336632

448824

673216

897612

13464 8

BIT WORD

BIT WORD

BIT WORD

BIT WORD

BIT WORD

BIT BYTES

FIGURE VI-1.' ERB MAT Physical Record Format

-18-
The scale factors indicated on the following word descriptions

are used to retain the desired degree of signficance . For

example, the quantity representing WFOV latitude if floated and

divided by its scale factor of 100, will give the latitude in

degrees.

VI-A. DAILY SUMMARY RECORD

This is the last unpadded logical record in each file. Figure

VI-2 is the basic forma t for the daily summary record and the

word description for this format is as follows:

( 1) PHYSICAL RECORD NUMBER (12 BITS) : This identifies

the physical record within a file.

( 2) RECORD ID (8 BITS) : Identifie s record type and the

last record writte n in a file and records in the last

fil e on the tape. The MSB of the first logical record

of the last physical record will be set to "1", if that

physical record is the last one written in the file.

The second most MSB will be set on all logical records

in the last file on the tape. The record type will use

the six LSB of that byte to identify the type of record

being read: 11 = LOGICAL DATA RECORD, 12 = ORBITAL

SUMMARY RECORD , 13 » DAILY SUMMAR Y RECORD , 14 =

CALIBRATION ADJUSTMENT TABLE RECORD.

( 3) LOGICAL RECORD NUMBER (8 BITS): This identifies the

logical record within a physical record.

( 4) NUMBER OF ORBITS (16 BITS): The number indicates the

number of orbits contained in this file.

( 5) MONTH - FIRST ORBIT (16 BITS) : This word is the

mont h at the start of the first orbit block in this

file.

( 6) DAY - FIRST ORBIT (16 BITS): This word is the day at

the start of the first orbit block in this file.

( 7) YEAR - FIRST ORBIT (16 BITS): This word is the year

at the start of the first orbit block in the file.

( 8) TIME - FIRST ORBIT (16 BITS) : This is the GMT hour

and minute s (10 0 x hour + minute) at the start of the

first orbit block in the file.

( 9) MONTH - LAST ORBIT (16 BITS): This word is the month

at the end of the last orbit block in the file.

(10) DAY - LAST ORBIT (16 BITS) : This word is the day

number at the end of the last orbit block in the file.

(11) YEAR - LAST ORBIT (16 BITS) : This word is the year

at the end of the last orbit block in the file.

-19-
MSB LS3

32 30 28 26 24 22 20 18 15 14 12 10 8 6 4 2 l

1

2

3

4

5

6

7-10

11

12

13

14

16

17

18

19

20

21-28

29

30-37

38-62

53-72

73-177

178-

212

213-

257

258

259

263i

277

PHYSICAL RECORD NO. Q.2 ) i SPARES

NO. OF ORBITS (16)

DAY- FIRST ORBIT (16)

riMZ-FIRST ORBIT (16)

DAY-LAST ORBIT (16)

TIME-LAST OIUJLT (16)

SENSITIVITY FACTORS SOLAR CHS. 1-8

CO.VT. REC. I.D.

 LOC'ICAL HEC

- TM-

MONTH-FIRST 0?31T (16)

YEAR- FIRST OPJUT (16)

MONTH-LAST OP31T (16)

YEAR-LAST ORBIT (16)

SPARES (16)

C128BITS)

SENSITIVITY FACTORS CH. 9 AND 10 (32)

CALIBRATION INTERCEPTS CH. 11 sjTD 12 (32)

^CALIBRATION SLOPES CH. 11 AND 12 (32)

SENSITIVITY FACTORS CH. 13 THRU 18 (96 BITS)

CALIBRATIO;; INTERCEPTS CHS. 19-22 (64)

CALIBRATION SLOPES CHS. 19-22 (64)

DATA OR3IT NU7-IEERS OF ALL ORBITS IN DAY. 15, 16 BIT ORBIT MOS. (240 BITS)

1 SPACES (16)

SPARES (288 BITS)

STATS FOR NORMALIZED SOLAR IRRADIAKCES

(800 BITS)

(320 BITS) SPARES

STATS FOR ELECTRONIC GAIN .RATIOS

(3360 SITS)

STATS FOR GO/KO GO NET COUNT RATIOS

(1120 BITS)

SPARES (1440 BITS)

OFFSETS FOR CHS. 13 AITD 14 (32)

EARTH-SUN DISTANCE (16 BITS) SPAR23

SPARES (128 BITS)

(16)

SUM OF THE SQUARES: GO/NO GO NET COUNT RATIOS (44 8 BITS)

192

32C

416

5i:-:

640

10.?'.;

380

1184

1984

2304

566 4

6734

C22 J

325!r-

3288

8416

8SL^

FIGURE VI-2. ERB MAT Daily Summary Logical Record Format

-20-
MSB L3B

32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 1

297

305

1682

STATISTICS FOR SHORTWAVE SCAN (640 BITS)

SUM OF SQUARES: SHORTWAVE CHECK RATIOS :256 BITS!

SPARES: ZERO FILLED (44064 BITS)

950')

9792

5332-

1682 32 BIT WORDS 3364 16 BIT WORDS 6728 8 BIT BYTES

FIGURE VI-2. ERB MAT Daily Summary Logical Record Format

(Continued)

-21-
(12) TIME - LAST ORBIT (16 BITS) : This is the GMT hour

andminut e (100 x hour + minute) at the end of the last

orbit block in the file.

(13) SPARES (16 BITS): Zero filled.

(14) SENSITIVITY FACTORS, CHANNELS 1 THROUGH 8 (8 CHANNELS

x 16 BITS = 128 BITS): Sensitivity factors for solar

Channels 1 through 8 (with a scale factor of 10 ).

(15) SENSITIVITY FACTORS, CHANNELS 9 AND 10 (2 CHANNELS x

16 BITS = 32 BITS) : Sensitivity factors for solar

Channels 9 and 10 (with a scale factor of 10 ).

(16) CALIBRATIO N INTERCEPTS, CHANNELS 11 AND 12 (2

CHANNELS x 16 BITS = 32 BITS): Calibration intercepts

for fixe d Earth flu x Channels 11 and 12 (with a scale

factor of 100).

(17) CALIBRATION SLOPES, CHANNELS 11 AND 12 (2 CHANNELS X

16 BITS = 32 BITS): Calibration slopes for fixed Earth

flu x Channels 11 and 12 (with a scale factor of 10 ).

(18) SENSITIVIT Y FACTORS, CHANNELS 13 THROUGH 18 (6

CHANNELS x 16 BITS = 96 BITS): Sensitivity factors for

fixed Earth flu x Channels 13 and 14 and shortwave

scanning Channels 15, 16, 17, and 18 (with a scale

factor of 10 ).

(19) CALIBRATION INTERCEPTS, CHANNELS 19 THROUGH 22 (4

CHANNELS x 16 BITS = 64 BITS): Calibration intercepts

for longwave scanning Channels 19, 20, 21, and 22 (with

a scale factor of 100).

(20 ) CALIBRATIO N SLOPES, CHANNELS 1 9 THROUGH 2 2 ( 4

CHANNELS x 16 BITS = 64 BITS): Calibration slopes for

longwave scanning Channels 19, 20, 21, and 22 (with a

scale factor of 10 ).

(21) DATA ORBIT NUMBERS (15 ORBITS x 16 BITS = 240 BITS):

Data orbit numbers at the start of all orbit blocks in

this fil e includin g up to a maximu m of 15 orbit

numbers.

(22 ) SPARES (304 BITS): Zero filled.

(23 ) STATISTICS FOR SOLAR IRRADIANCE (5 STATISTICS X 10

CHANNEL S x 16 BITS = 800 BITS) : Statistic s which

include th e minimum , mean , maximum , an d standar d

deviatio n value s plus the numbe r of samples- for

normalized solar irradiances (scale factor for Channels

1 throug h 5 and 10 is 10, scale factor for Channels 6

throug h 9 is 100). The numbe r of sample s is not

scaled.

-22-
(24 ) SPARES (320 BITS): Zero filled.

(25 ) STATISTICS FOR ELECTRONIC GAIN RATIOS (5 STATISTICS X

3 STEPS x 14 CHANNELS x 16 BITS = 3360 BITS): The

statistics for electronic gain ratios have a scale

factor of 1000, except for the number of samples which

is unsealed.

(26 ) STATISTIC S FO R GO/N O G O NET COUNT RATIOS ( 5

STATISTICS x 14 CHANNELS x 16 BITS = 1120 BITS): The

statistics for the GO/NO GO net count ratios have a

scale factor of 1000, except for the number of samples

which is unsealed.

(27 ) SPARES (1440 BITS): Zero filled.

(28 ) OFFSET FOR CHANNELS 13, 14 (2 CHANNELS X 16 BITS = 32

BITS): The offset in counts for Channels 13 and 14.

(29 ) EARTH-SUN DISTANCE (16 BITS): The Earth-Sun distance

in astronomical units (with a sc;

(30 ) SPARES (144 BITS): Zero filled.

in astronomical units (with a scale factor of 10 ).

(31) SUM OF THE SQUARES; GO/NO GO NET COUNT RATIOS (14

CHANNELS x 32 BITS = 448 BITS): The sum of the squares

for the GO/NO GO net count ratios for Channels 1 to 14,

scaled by 100.

(32 ) STATISTICS FOR SHORTWAVE SCANS (5 STATISTICS x 4

SHORTWAVE CHANNEL S X 2 SOLAR CHANNELS X 16 BITS = 640

BITS): These statistics are the count ratios during

shortwave check for the shortwave scan channels (with a

scale factor of 1000, except for number of samples).

(33) SUM OF THE SQUARES; SHORTWAVE CHECK RATIOS (4

SHORTWAVE CHANNEL S X 2 SOLAR CHANNELS x 32 BITS = 256

BITS) : The sum of the squares for the shortwave check

ratios scaled by 1000.

(34 ) SPARES (44,06 4 BITS) : These spare bits are used to

fill out to logical record siz e and will be zer o

filled.

VI-B. LOGICAL DATA RECORD

Each logical data record contains one VIP major frame of ERB

data. The forma t for this record is shown in Figure VI-3 with

word descriptions as follows:

( 1 ) PHYSICA L RECOR D NUMBE R (1 2 BITS) : This word

identifie s the physica l record number within a data

file.

-23-
M

WORD

1

2

3

4

5

17

29

31

33

35

37

41

42

43

44

46

47

48

49

51

67

75

AST

1227

1235

1363

1-570

1415

149S

(SB

32

FILE 6 B

PHYSICAL RECORD NO. 12 BITS 4 SPARES CONT . RECORD

LS3

1 BITS

ITS 8 BITS

I.D. LOGICAL RECORD HO.

YEAR (16) DAY OF YEAR (16)

HOUR/MINUTE (16) GMT SECONDS (lb)

ORBIT NUMBER (16) SPARF.

TIME FROM ERB TURN ON (32)

POSITIONS OF THE SPACECRAFT (384)

VELOCITIES OF THE SPACECRAFT (384)

SUBSATELLITE LATITUDES (64)

SUBSATELLITE LONGITUDES (64)

LATITUDES OF THE WIDE FIELDS OF VIEW (64)

LONGITUDES OF THE WIDE FIELDS OF VIEW (64)

SPACECRAFT ALTITUDES (128)

SPACECRAFT PITCH ANGLE (16) SPACECRAFT ROLL A.VGLE (16)

SPACECRAFT YAW ANGLE (16) GAMMA ENCODER POSITION (16)

SOLAR ZENITH ANCLE (16) SOLAK AZIMUTH ANI.L!-. Ut>;

SOLAR RIGHT ASCENSIONS (64)

SOLAR DECLINATION (16) SPARES (16)

SPAKES (16) SPARES (16)

OS AS BETA ANGLE (16) . DSAS ALPHA ANGLE (16)

GREENWICH HOUR ANGLES (64)

32 ALPHA ENCODER POSITIONS 0-264 (512)

16 BETA ENCODER POSITIONS 0-885 (256)

LATITUDES FOR 1152 SUB FOVs FOR CHANNELS 15-22 (NFOV) (18432)

LONGITUDES FOR 1152 SUBFOVs FOR CHANNELS 15-22 (NFOV) (18432)

CHANNEL 11-14 (WFOV) IRRADIANCES (256)

CHANNEL 15-22 (NFOV) IRRADIANCES (4096)

INSTRUMENT TEMPERATURES (PLATINUM) (384)

INSTRUMENT TEMPERATURES (THERMISTOR) (1280)

SOLAR CHANNELS DETECTOR OUTPUT (2560)

32

64

96

128

160

544

928

992

1056

1120

1184

1312

1344

1375

1408

1472

1504

1536

1568

1632

2144

2400

20832

39264

39520

43616

44QOO

45280

47840

FIGURE VI-3. Logical Data Record Format

-24-
1

WORD

i sm

1 All

1639

1640

1646

1651

1652

1660

1661

1662

1666

1682

1SB

12

LSB

1 BITS

EARTH FLUX CHANNELS DETECTOR OUTPUT (256)

SCANNING CHANNELS DETECTOR OUTPUT (4096)

ERB DIGITAL A WORDS (256)

INSTRUMENT STATUS (16)

SPACECRAFT STATUS BITS (192)

SOLAR CHANNEL FLAGS (160)

EARTH FLUX CHANNEL FLAGS (16)

SCANNING CHANNEL FLAGS (256)

SCAN INFO WORD (16)

SPARES (16)

ALPHA ANGLE FLAGS (32)

BETA ANGLE FLAGS (16)

PLATINUM TEMPERATURE MONITOR FLAGS (48)

SPARES (16)

TERMISTOR TEMPERATURE MONITOR FLAGS (80)

REFERENCE TIME (32)

SPARES (480)

48096

52192

52448

52480

52672

52832

52864

53120

53152

53184

53312

53824

1682 32-BIT WORDS

3364 16-BIT WORDS

6728 8-BIT BYTES

FIGURE VI-3. Logical Data Record Format

(Continued)

-25-
( 2) RECORD ID

( 3)

( 4)

( 5)

( 6)

( 7)

( 8)

(8 BITS) : Identifie s record type and the

record writte n in a file and records in the last

The MSB of the first logical record

last

fil e on the tape.

of the last physical record will be set to "1", if that

physica l record is the last one written in the file.

The second most MSB will be set on all logical records

in the last file on the tape. The record type will use

the six LSB of that byte to identify the type of record

being read: 11 = LOGICAL DATA RECORD, 12 = ORBITAL

SUMMARY RECORD , 13 = DAIL Y SUMMAR Y RECORD , 14 =

CALIBRATION ADJUSTMENT TABLE RECORD.

LOGICAL RECORD NUMBER (8 BITS): This identifies the

logical record within a physical record.

YEAR (16 BITS): The two least significant numbers of

the calendar year.

DAY OF YEAR (16 BITS): The day of the year (1 to 365

or 366).

HOUR/MINUTE (16 BITS): This word is the GMT hour and

minut e (100 x Hour + Minute ) of the start of data in

this record.

GMT SECONDS (16 BITS) : This word is the GMT seconds

(0 through 59) of the start of data in this record.

ORBIT NUMBER (16 BITS) :

associated with this data.

The orbit .data block number

( 9) SPARE (16 BITS) : Not zero fille d

Channel 12 shutter temperature.

M a y contai n

(10) TIME FROM ERB TURN ON (32 BITS) : Time, in seconds,

fro m th e ERB instrumen t bein g turne d on , t o th e

beginning of this major frame.

(11) POSITIONS OF THE SPACECRAFT (3 COORDINATES X 4 TIMES

x 32 BITS = 384 BITS) : The Earth-centered inertial

cartesian positio n of the spacecraft at 2, 6, 10, and

14 seconds fro m the beginnin g of the major frame in

kilometers scaled by 10 .

(12) VELOCITIES OF THE SPACECRAFT (3 COORDINATES X 4 TIMES

x 32 BITS = 384 BITS) : The Earth-centered inertial

cartesian velocity of the spacecraft at 2, 6, 10, and

14 seconds fro m the beginning of the major frame, in

kilometers per second scaled by 10 .

(13) SUBSATELLITE LATITUDES (4 LATITUDES x

BITS ) The geodetic subsatellite latitude

South to +90~degrees North) at 2, 6, 10,

fro m the beginnin g of the major frame,

A fill value of 2222 2 is used if no

available.

16 BITS = 64

(-90 degrees

and 14 seconds

scaled by 100.

information is

-26-
(14) SUBSATELLITE LONGITUDES (4 LONGITUDES X 16 BITS = 64

BITS): The geodetic subsatellite longitud e (-180

degrees West to +180 degrees East) at 2, 6, 10, and 14

seconds fro m the beginning of the major frame, scaled

by 100 . A fil l valu e of 2222 2 is used if no

information is available.

(15) LATITUDES OF THE WIDE FIELD OF VIEW (4 LATITUDES X 16

BITS = 64 BITS) : The geodetic latitudes (-90 degrees

South to +90 degrees North) for the Wide Field of View

at 2, 6, 10, and 14 seconds from the beginning of the

majo r frame , scaled by 100. A fill value of 22222 is

used if no information is available.

(16) LONGITUDES OF THE WIDE FIELD OF VIEW (4 LONGITUDES X

16 BITS = 64 BITS): The geodetic longitude (-180

I degrees West to +180 degrees East) at 2, 6, 10, and 14

seconds from the beginning of the major frame, scaled

by 100 . A fil l valu e of 2222 2 is used if no

information is available.

(17) SPACECRAFT ALTITUDES (4 ALTITUDES x 32 BITS = 128

BITS): The spacecraft altitude in kilometers at 2, 6,

10, and 14 seconds fro m the beginnin g of the major

frame, scaled by 10 .

(18) SPACECRAFT PITCH ANGLE i16 BITS) : The spacecraft

pitch angle in degrees at the middl e of this major

frame.(with a scale factor of 100).

(19) SPACECRAFT ROLL ANGLE (16 BITS): The spacecraft roll

angleTndegreesatth e middl e of this major frame

(with a scale factor-of 100).

(20 ) SPACECRAFT YAW ANGLE (16 BITS) : The spacecraft yaw

angle in degrees at the middl e of this major frame

•'(with a scale factor of 100).

(21) GAMMA ENCODER POSITION (16 BITS) : Identifie s the

solar channe l subassembly position at the middle of

this major frame (-20 to +20).

(22 ) SOLAR ZENITH ANGLE (16 BITS): This word is the solar

zenit h angle Tn degrees at the subsatellite point (0

degree - 180 degrees) wit h a scale factor of 10. A

fil l value of 2222 2 is used if no informatio n is

available.

(23 ) SOLAR AZIMUT H ANGLE (16 BITS) : This word is the

solar azimut h angle at the subsatellite point relative

to the subsatellit e TRAC K on the Earth in degrees (0

degree - 360 degrees) wit h a scale factor of 10. A

fill value of 2222 2 is used if no informatio n is

available.

-27-
(24 ) SOLAR RIGHT ASCENSION

(25 )

(26 )

(27 )

(28 )

(29 )

-180 degrees to

ascension of the

seconds fro m the

by 100. From ERB-ILT Ephemeris data.

(4 RIGHT ASCENSIONS x 16 BITS =

+180 degrees, 6 4 BITS) : Righ t

Sun in degrees at 2, 6, 10, and 14

beginning of the major frame, scaled

SOLAR DECLINATION (16 BITS)

in degrees (-9 0 degrees to

ERB-ILT Ephemeris data (scaled

: Declination

+ 9 0 degrees)

by a factor of

of the Sun

fro m th e

100) .

SPARES (16 BITS): Zero filled spare bits.

SPARES (16 BITS): Zero filled spare bits.

SPARES (16 BITS): Zero filled spare bits.

PSAS ALPHA ANGLE (16 BITS) : The DSAS Alpha Angle

(elevation of Sun relative to S/C axes) fro m the

ERB-ILT. Value is in degrees (-180 degrees to +180

degrees) scaled by 10. If no DSAS data is available,

the value will be set to -999.9 x 10.

(30) DSAS BETA ANGLE

( a z i mu t h

ERB-ILT.

degrees)

the value

of the

Value

scaled

will be

(16 BITS): The DSAS beta angl e

sun relative to S/C axes) from, the

is in degrees (-180 degrees to +180

by 10. If no DSAS data is available,

set to -999.9 x 10.

(31) GREENWICH HOUR ANGLE (4 ANGLES X 16 BITS = 64 BITS):

The angle between the x-axis in the Earth-centered

inertial coordinate system and the x-axis in the Earthcentered fixe d coordinate system (Greenwich Meridian)

2, 6, 10, and 14 seconds from the beginning of the

frame . The value s are in radian s (

at

majo r

scaled by 100.

of vernal equinox,

. _ _ _ . 0 to 2 )

Negative when Greenwich Meridian West

(32 ) ALPHA ENCODE POSITION S (32 POSITIONS X 16 BITS =

BITS ) : alpha angle positions from

scanhead

Contain s 32

encoder (0-264 )

512

the

(33 ) BETA ENCODER POSITIONS (16 POSITIONS X 16 BITS = 256

BITS): Contain s 16 beta angle positions (0-885) from

the gimbal encoder.

( 34) LATITUDE FOR SCANNING CHANNELS SUB FOV'S ( 4 CHANNELS

BITS): Each of

32 FOVs per VIP

FOVs, each of

latitude and

x 9 SUBFOV x 32 FOV x 16 BITS = 18,432

the 4 scannin g channel telescopes has

frame . Each FOV is subdivided into 9 sub

whic h is located and assigne d geodetic

longitude corresponding to the center of the sub FOV,

The sub FOVs are numbered as follows:

-28-
9

6

3

3

5

2

7

4

1 SCAN DIRECTION

ERB FOV

The values of the latitudes are in degrees scaled by

100. When the NFOV telescopes do not see the Earth,

the latitude and longitude are given a value of 22222.

The latitude words are ordered first by FOV, then by

sub FOV, and finall y by scannin g channe l group

(telescope) as shown below:

WORD NO.

1

2

3

4

5 '

FOV

1

1

1

1

1

SUB FOV

1

1

1

1

2

CHANNEL GROUP

15,19

16,20

17,21

18,22

15,19

36

37

1

2

9

1

18,22

15,19

1152 32 18,22

(35 ) LONGITUDE S FO R SCANNIN G CHANNEL S SU B FOV' S ( 4

CHANNELS x 9 SUBFOVS x 32 FOVS x 16 BITS = 18432 BITS):

Each of the fou r scannin g channel telescopes has 32

FOVs per VIP frame . Each FOV is subdivided into nine

sub FOVs, each of whic h is located and assigned a

geodetic latitude and longitude corresponding to the

center of the sub FOV. The longitude words are ordered

as shown in Item 34. The longitud e value s are in

degrees scaled by 100. A fill value of 22222 is used

if no information is available.

(36 ) IRRADIANCES FOR CHANNELS 11 THRU 14 (4 IRRADIANCES x

4 CHANNEL S x 16 BITS = 256 BITS): Four irradiances

eac h for Channel s 11 thru 12 (0-12000) , fou r

irradiance s fo r Channe l 1 3 (0-9000) , an d fou r

irradiance s for Channel 14 (0-5000), all with a scale

factor of 10.

-29-
(37 ) IRRADIANCES FOR CHANNELS 15 THRU 22 (32 IRRADIANCES x

8 CHANNELS x 16 BITS = 409 6 BITS) : Thirty-two

irradiance s each for Channels 15 thru 18 (0-3000) and

thirty-two irradiance s each for Channels 19 thru 22

(0-1950), all with a scale factor of 10.

(38) INSTRUMENT TEMPERATURES (PLATINUM) (24 TEMPERATURES x

16 BITS = 384 BITS) : Instrumen t temperature s in

degrees Celsius fro m platinum thermometers (with a

scale factor of 10).

(39 ) INSTRUMENT TEMPERATURE AND VOLTAGE MONITORS (80 X 16

BITS = 1280 BITS): Instrument temperatures in degrees

Celsius fro m thermistors and logic level voltage in

volts (all except the last quantity , whic h has a

scaling factor of 100, are with a scale factor of 10).

See Table VI-1 for description. For Channels 1 thru

10, thermopile base temperature s a fill value of 29

degrees Celsius is used if temperatures are out of

range.

(40 ) SOLAR CHANNELS DETECTOR OUTPUT (10 CHANNELS X 16

SECONDS x 16 BITS = 256 0 BITS) : This is the solar

channels detector output in counts.

(41) EARTH FLUX CHANNELS DETECTOR OUTPUT (4 CHANNELS X 4

SECONDS x 16 BITS = 256 BITS): This is the Earth flux

channels detector output in counts).

(42 ) SCANNING CHANNELS DETECTOR OUTPUT (8 CHANNELS X 32

HALF SECONDS x 16 BITS = 409 6 BITS) : The detector

output in counts of the scanning channels.

(43 ) "DIGITAL" WORDS (16 DIGITA L WORDS X 16 BITS = 256

BITS) : 16 Digita l words. The even 8 digital words

are:

COL ROW

+ PTM Excitation Voltage BB 24 06

- PTM Excitation Voltage BB 24 16

+ 'PTM Excitation Voltage Scan Channel 24 26

- PTM Excitation Voltage Scan Channel 24 36

+ PTM Excitation Voltage Earth Channel 24 46

- PTM Excitation Voltage Earth Channel 24 56

+ 15 Volt Monitor 24 66

- 15 Volt Monitor 24 76

The odd eight digital words are also located in Column

24. These eight words are status words and each bit of

each word indicates unique instrument status. The

status for each of these bits is defined in Table Vl-2.

-30-
TABLE VI-1.

Instrument Temperatures and Voltage Monitors

Number Description

1 CH 11 Shutter Temperature

2 CH 12 Shutter Temperature

3 CH 19 Telescope Port Temperature

4 CH 20 Telescope Port Temperature

5 CH 21 Telescope Port Temperature

6 CH 22 Telescope Port Temperature

7 CH 9 Module Temperature

8 CH 10 Module Temperature

9 CH 13 Module Temperature

10 CH 14 Module Temperature

11 CH 1 Thermopile Base Temperature

12 CH 2 Thermopile Base Temperature

13 CH 3 Thermopile Base Temperature

14 CH 4 Thermopile Base Temperature

15 CH 5 Thermopile Base Temperature

16 CH 6 Thermopile Base Temperature

17 CH 7 Thermopile Base Temperature

18 CH 8 Thermopile Base Temperature

19 CH 9 Thermopile Base Tempera'ture

20 CH 10 Thermopile Base Temperature

21 CH 11 Shutter Temperature

22 CH 12 Shutter Temperature

23 CH 19 Telescope Port Temperature

24 CH 20 Telescope Port Temperature

25 CH 21 Telescope Port Temperature

26 CH 22 Telescope Port Temperature

27 CH 19 Telescope Baffle Temperature

28 CH 20 Telescope Baffle Temperature

29 Shorted Out

30 Shorted Out

31 CH 1 Module Temperature

32 CH 2 Module Temperature

-31-
TABLE VI-1.

Instrument Temperatures and Voltage Monitors

(Continued)

Number Description

33 CH 3 Module Temperature

34 CH 6 Module Temperature

35 Solar Channel Assembly Casting Top Temperature

36 Solar Channel Assembly Casting Bottom Temperature

37 Solar Channel Assembly Shield Attach Point

38 Solar Channel Assembly Amplifier Heat Sink

39 Earth Flux Channel Assembly, Front

40 Earth Flux Channel Assembly, Back

41 CH 11 Shutter Temperature

42 CH 12 Shutter Temperature

43 CH 19 Telescope Port Temperature

44 CH 20 Telescope Port Temperature

45 CH 21 Telescope Port Temperature

46 CH 22 Telescope Port Temperature

47 CH 9 Module Temperature

48 CH 10 Module Temperature

49 CH 13 Module Temperature

50 CH 14 Module Temperature

51 Earth FLux Channel Assembly Heat Sink

52 Main Frame Mounting Tab, Front

53 Main Frame Mounting Tab, Back

54 3 Gimbal Bearing and Gear Box Temperature

55 6 Gimbal Motor Temperature

56 Solar Channel Assembly Drive Motor Temperature

57 SWSC Det. Temperature

58 a Sweep Gear Box and Motor Temperature

59 Shorted Out

60 Post Amplifier Synch Demod Area Temperature

61 CH 11 Shutter Temperature

62 CH 12 Shutter Temperature

63 CH 19 Telescope Port Temperature

-32-
TABLE VI-1.

Instrument Temperatures and Voltage Monitors

(Continued)

Number Description

64 CH 20 Telescope Port Temperature

65 CH 21 Telescope Port Temperature

66 CH 22 Telescope Port Temperature

67 CH 19 Telescope Baffle Temperature

68 • CH 20 Telescope Baffle Temperature '

69 Shorted Out

70 Shorted Out

71 Power Supply Area Temperature

72 A/D Area Temperature

73 Heat Radiator Temperature

74 Remote Scan Mech. (a) Axis Bearing Temperature

75 " CH 12 FOV Stop Temperature

76 CH 11 Thermopile Base Temperature

77 CH 12 Thermopile Base Temperature

78 CH 13 Thermopile Base Temperature

79 CH 14 Thermopile Base Temperature

.80 -i- 5 V. Logic Level

-33-
(44) INSTRUMENT STATUS WORD (16 BITS): This status word

indicates the status of the scanhead, the shutters for

Channels 11 and 12, the Channel 12 Field Of View, the

electronics calibration and the GO/NO GO heater. The

status is interpreted as follows:

Units Decimal Digit (Indicates Position of Scanhead)

0 = Scan Mode

1 = Nadir Position

2 = Space Position

3 = LW Check Position

4 = SW Check Position

9 = Transition Mode

Tens Decimal Digit (Indicates Status of Shutters,

Channels 11 and 12)

0 = Reference Channels CLOSED, Channel 12 OPEN

1 = Reference Channels CLOSED, Channel 12 CLOSED

2 = Reference Channels OPEN, Channel 12 OPEN

3 = Reference Channels OPEN, Channel 12 CLOSED

9 = Status Unknown

Hundreds Decimal Digit (Indicates Status of Channel

12 FOV).

0 = Channel 12 FOV Wide

1 = Channel 12 FOV Narrow

9 = Status Unknown

Thousands Decimal Digit (Indicates Status of El. Cal.

and GO/NO GO Heater)

0 = GO/NO GO Heater OFF, El. Cal. OFF

1 = GO/NO GO Heater OFF, El. Cal. ON

2 - GO/NO GO Heater ON, El. Cal. OFF

3 = GO/NO GO Heater ON, El. Cal. ON

9 = Status Unknown

(45) SCAN INFORMATION WORD (16 BITS): This word provides

scan information such as scan mode, position, and

errors. If the instrument is not scanning, these bits

will be zero.

Units Decimal Digit ;

Tens Decimal Digit ;

Hundreds Decimal Digit ;

Thousands Decimal Digit:

Major Frame Count (1-7)

Scan Mode (1-5)

0 = Mode 4 Portion of Mode 5

1 = Mode 3 Portion of Mode 5

0 = No Scan Errors

1 = Alpha Scan Errors

2 = Beta Scan Errors

3 = Alpha and Beta Errors

-34-
TABLE VI-2.

ERB Odd Digital Word Format (VIP Column 24)

V,

s

i:

£

a

0

~

<a>

^*

0

irt

^«

***•

CM

-

VN>~

>"

^Vv *f

^v "^

•^-

•^ O

b« ^^

z

b> <M

z"*

z§

S§

O

^

q12

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01

O _

e <:

"

o o

z »-* O ei 01

.J 0

r: a

O •-!

M U

Z bl

o o -

1

</» Z

Z bl

o o ^

tn Z

Z ul

^ Q ^ O O **

^ -<

u

u

< -c

u

CN

C- J- __

•'i O O

r- <J

O

O •>.

-C o

o

"

o

a t-> z

<

 = <

25 6

u

*Mg

fj i^ S

O « ^"

w> ^5 O

u

*s

z > S=i

3 3 5 S

g

S !J U £

2 5 — ==

« s G S

u

a

b: z

0 Si <

C- O ^

en J O

O

Z

O —

M O

1

U? O »-< >-<

u u

c. _

c. O

m

oa -

o 5

o

o :.; n

<3 < ^

"*-

*y

o

f=fc:0

o > -s.

</> S ^^i

o

'=: a t-i

o ^

m l£ fj

w

M|

Sz < S

s sS.

Q

J U ^

u ~ ^

u o

u

a

S« xS

CM i* *S

I"^ "i* 71

to O ^

u

>• C3

o ^ -z.

^r

ol to O

•^ °

l-t

=: a

O •-

in o

11 i— i

0 cs 01

-J U

r-

-

ll 13

§r

i

0

Ol U Z

G u o

u

Igag

« >- u -c

— J- m ~.

•^ => o :-J.

li- » « O

— vi t> t;

—

a —

S«^

Q -

»^

£ ^

U

< 01

U

5"

ot

0 _

~ o

c.

_^ o

3

O In

O O

O o — 1

VI U

p

in O

U

fc<

O »

35 **f

w o

<w

Iso

s>22 *^

§

=- l

v\

cc

o

3C ^J

< ra

O <

u

-^

P S

(0 U

o

o

-a.

B

^

01

a

en

-

S

•S.

a

^

»

•^

a

„

O

*^

a

o

^a

^

£

•a^

a

1^

o

•*.

a

n

"*•

a

n

a

i-^

a

X

u

«

f-l

0

a

Is

in u

0 0

O 3 «>*

.3 0

•x

o

•J -w

»- 0 =-

02£ <. « t/ —l

(n C

—

O » CJ

rJ 3 G

H ^

C ^ ^*

—« - 3 ^ — CJ

H

^ *"^

2 rj

1— «.i

p^ Z

-J U

U

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< -J.

o —u> O

f-.

U

u r:

•J O

M

0

n

ei

in

snaawnci QHOM Tfiioia

- -35-
(46 ) SPACECRAFT STATUS BITS (19 2 BITS) : 192 Individual

bits. Wher e digital B functions are used for status,

all samples will be used. Events will use 3 bits (0-7)

each time it is sampled, whic h is twice per major

frame . The status and events are from the ERB-ILT and

are given in the proper order in Table VI-3.

(47 ) SOLAR CHANNEL FLAGS (10 CHANNELS X 16 SECONDS X 1 BIT

= 160 BITS): 1-Bit flags indicating that the data was

(BIT=1 ) , or was not (BI T = 0) taken in a data quality

loss interval. In addition, these bits are set to 1

when locations are filled.

(48 ) EARTH FLUX CHANNEL FLAGS (4 CHANNELS X 4 VALUES X 1

BIT = 16 BITS) : 1-Bit flags indicating that the data

was (BIT=1), or was not (BIT=0) taken in a data quality

loss interval. In addition, these bits are set to 1

when locations are filled.

(49 ) SPARES (16 BITS): Zero filled.

(50 ) SCANNING CHANNEL FLAGS (8 CHANNELS x 32 HALF SECONDS

x 1 BIT = 256 BITS): 1-Bit flags indicating that the

data was (BIT=1) , or was not (3IT=0) taken in a data

quality loss interval. In addition, these bits are set

to 1 when locations are filled.

(51) ALPHA ANGLE FLAGS (32 HALF SECONDS X 1 BIT = 32

BITS) : 1-Bit flag s indicatin g that the data wa s

(BIT=1), or was not (BIT=0 ) taken in a data quality

loss interval. In addition, these bits are set to 1

when locations are filled.

(52 ) BETA ANGLE FLAGS (16 SECOND S X 1 BIT = 16 BITS) :

1-Bit flag s indicatin g that the data was (BIT=1), or

was not (BIT=0), taken in a data quality loss interval.

In addition, these bits are set to 1 when locations ara

filled.

(53 ) SPARES (16 BITS) - Zero filled.

(54 ) PLATINU M TEMPERATURE MONITOR FLAGS (48 MONITORS x 1

BIT = 48 BITS) : 1-Bit flags indicating that the data

was (BIT=1), or was not (BIT=0) taken in a data quality

loss interval. In addition , these bits are set to 1

when locations are filled.

(55 ) THERMISTOR TEMPERATURE MONITOR FLAGS (80 MONITORS X 1

BIT = 80 BITS) : 1-Bit flags indicating that the data

was (BIT=1), or was not (BIT=0) taken in a data quality

loss interval. In addition , these bits are set to 1

when locations are filled.

-36-
TABLE VI-3.

Spacecraft Status arid Events

No.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

16

17

18

19

20

21

22

23

24

25

26

27

28

i9

30

Description

SATELLITE DAY/NIGHT

TLM PWR ON /OFF

DSAS PWH ON/OFF

IR ZIP/DIP TO TR1

1R ZIP/DIP TO TR2

IR ZIP/DIP TO TR3

TR1 POWER ON/OFT

TR2 POWER ON/ OFF

TR3 POWER ON/OFF

XPONDER A/B POWER

XPONDER RANGING A

it TM B

V B XMTR A PWR

TT B XMTR B PWR

W B XMTR A/B SELECTED

CZCS CHANNEL 1 PWR

CZCS " 2 "

tt n 3 IB

n n 4 **

n n e n

» n g n

CZCS ELECT. PWR

CZCS SCAN DRIVE

CZCS CAL LAMP STATUS

CZCS RECORDING CZCS DATA

REAL TIME DATA COLLECTION

THIR STATUS

LI MS ELECT

LI MS ADAPT SCAN

LIMS ACQ SCAN

u;/(0)

BIT/STATE

DAY=1/NIGHT-0

ON/OFF

ON/OFF

ZIP/DIP

ZIP/ DIP

ZIP/DIP

ON/OFF

OH/OFF

ON/OFF

0-Both OFF/1=A ON

2-B ON/ 3 -Both ON

ON/OFF

ON/OFF

ON/OFF

ON/OFF

A/B

ON/OFF

ON/OFF

ON/OFF

ON/OFF

ON/OFF

ON/OFF

ON/OFF

ON/OFF

0-Botb OFF/1-1 ON

2-2 ON/3-UNK

1-YES/O-NO

1=YES/0=NO

0=OFF/1=RAD.ON

2- ALL ON/^- 3= FAIL

ON/ OFF

ON/ OFF

ON/ OFF

FUNC/ EVENT Sos

EV-17

FN-6601

FN-16001

FN-22008

FN-22009

FH-22010

FN-18006

FN-18036

FN-18056

(SPECIAL EVENT

FN-19002

FN-19006

FN-7160

FN-7260

FH-7165

FN-8001

FN-8002

FN-8003

FR-8004

FN-8005

FN-8006

FN-8007

FN-8008

(SPECIAL EVEN

SPECIAL EVENT

SPECIAL EVENT

EV-88

FN-11001

FN-11004

FN-11005

COJ./ROV,

6/8

6/6

6/16

6/17

6/26

71/4

71/4

71/3

)

6/2

6/6

6/8

6/9

6/2

6/1

6/2

6/3

6/4

6/5

6/6

6/7

6/10

6/16

6/19

6/20

-37-
TABLE VI-3. Spacecraft Status and Events

No

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

(

Description

LI MS CAUB SPACE

LI MS SOURCE CALIBRATE

SAMS POWEfl

SAMS LIMB SCAN DRIVE

SAMS AZIMUTH SCAN DRIVE

SBUV/TOMS MASTER POWER

SBUV PWR ENABLE

SBUV STEP SCAN

SBDV CONTINUOUS SCAN

SBUV CAGE CAM

SBOV/TOMS WAVSLENGTH CAL

TOMS PWR ENABLE

SBUV/TOMS ELECT CAL

SBUV/TOMS FRAME COUNTER

(Fijrst in Time)

(Second in Tine)

£S3 ELECT

ERB SCAN

JERB STEPPER DRIVER

ERB CHOPPER OPERATING

SMMR DATA STSTEM

SMMR CHANNEL 1 PWR

" » 2 "

" « 3 «

'• •• 4 n

» .. 5 .,

SMMR SCAN POWEH ON/OF?

ENCODES OUTPUT A/B

SAM II POWER

SAM II STANDBY

SAM II SCAN MODE

SAM II SLEW MODE

SAM II GIMBAL MODE

SBUV/TOMS DATA TAKING MODE

SPARE

Indicates frame status for

Continued)

(1)/(0)

BIT/STATEYES/NO

YES/NO

ON /OFF

ON /OFF

ON /OFF

ON /OFF

ENA/DIS

SET/RESET

SET/ RESET

SET/ RESET

SET/ RESET

ENA/DIS

ON/OFT

the 4th LSBJ Qf

7UNC/EVENT Nos

FN-11006

FN-11007

FN-12001

FN-12002

FN-12003

FN-13001

FN-13002

FN-13005

FN-13006

FN-13007

FN-13008

FN-13009

FN-13020

*-|

the 3rd LSBrCol.l2J SPECIAL EVENT

the 2nd LSBJRow OJ

the 4th LSBl Qf 1

the 3rd LSB>Col.l2J SPECIAL EVENT

the 2nd LSsJ How 40J

ON/OFF

ON/OFF

OFF/NO

YES/NO

ON/OFF

ON/ OFF

ON/OFF

ON/ OFF

ON /OFF

ON/OFF

ON/OFF

A/B

ON/OFF

ON/OFF

ON/OFF

ON /OFF

ON/OFF

YES/NO

••_•

be previous VIP w

FN-14001

FN-14002

FN-14011

FN-14016

FN-15001

FN-15002

FN-15003

FN-15004

FN-15005

FN-15006

FN-15007

PN-15009

FN-17001

FN-17015

FN-17014

FN-17013

FN-17012

SPECIAL EVENT

ajor frajoe.

COL /Row

6/21

6/22

6/1

6/2

6/3

6/1

6/2

6/5

6/7

6/14

6/15

6/16

6/22

6/1

6/2

6/21

6/23

6/3

6/4

6/7

6/17

6/18

6/19

6/22

6/26

6/1

6/26

6/22

6/21

6/20

-38-
(56 ) REFERENC E TIM E (3 2 BITS ) - Time fro m Oh

 O m 0 s

GMT Januar y 1, 1978 to the beginnin g of this major

frame in seconds.

(57 ) SPARES (480 BITS) - Zero filled.

VI-C. ORBITAL SUMMARY RECORD

Afte r the last logical data record in each orbit block is the

orbital summary record. This record contains the peak solar

irradiance s for Channels 1 throug h 10 as well as various

quantities computed for the orbital summary. The format for this

record is shown in Figure VI-4 and contains the following:

( 1 ) PHYSICA L RECOR D NUMBE R (1 2 BITS) : This word

identifie s the physica l record number within a data

file.

( 2) RECORD ID (8 BITS): Identifie s record type and the

last record writte n in a file and records in the last

fil e on the tape. The MSB will be set to "1" if that

record is the last one written in the file. The second

most MSB will be set on all records in the last file on

the tape. The record type will use the 6 LSB of that

byte to identif y the type of record being read: 11 =

LOGICAL DATA RECORD, 12 = ORBITAL SUMMARY RECORD, 13 =

DAIL Y SUMMARY RECORD, 14 = CALIBRATION ADJUSTMENT TABLE

RECORD.

( 3) LOGICAL RECORD NUMBER (8 BITS): This identifies the

logical record within the physical record.

( 4) ORBIT NUMBER (16 BITS): The data orbit number at the

beginning of this orbit block.

( 5) START YEAR (16 BITS) : The units and tens digits of

the calendar year.

( 6) START NUMERIC DAY (16 BITS): The numeric day of the

year (1 to 365 or 366) .

( 7) START HOUR/MINUT E (16 BITS) : This word is the GMT

hour and minut e (100 x hour + minute) of the start of

data contained in this orbit block.

( 8) START LATITUDE (16 BITS) : This is the subsatellite

latitude (-9 0 degrees to 90 degrees) at the start of

data in this orbit block (with a scale factor of 100).

( 9) START LONGITUD E (16 BITS) : This is the subsatellite

longitude (-180 degrees to 180 degrees) at the start of

data in this orbit block (with a scale factor of 100).

-39-
MSB LSB

32 30 23 26 24 22 20 18 1.6 14 12 10 8 6 4 2 5

1

2

3

4

5

6

7

6

9

10

11

12

37

47

72

87

100

123

253

301

303

304

305

306

390

398

406

408

410

412

414

416

418

436

PHYSICAL RrCOTD NO. (12 BITS 1 4 SPARES rnJlT 1 &r£c<$ f.n.

ORUIT NO. (16) STABT VTMB

START DAT OF YEAR (16) START HOUR/MINUTE

START LATITUDE (16) START LONGITUBE

MAJOR FRAMES/OKUIT (16) END YEAR

END DAY Or YEAK (16) END HOUR/MINUTE

END LATITUDE (16) END LONGITUDE

{Sc'ff-.K^F.C NO.

(16)

(16)

(16)

(16)

(16)

(16)

NORTH TERMINATOR HOUR/MINTTE (16) NORTH TERMINATOR SECONDS ' (16)

SOUTH TERMIKATOX HOUR/MINUTE (16) SOUTH TERMINATOR SECONDS (16)

CJff SAT. DAY (16) SECONDS SAT. DAY (16)

GMT SAT. HI CUT (161 SECONDS SAT. NIGHT O6>

GMT SOLAR ?EAK HR/MIN (16) SECONDS-SOLAR PEAK MM

2 - MAJOR FRAME AVERAGES

(800 BITS)

NET SOLAR IRKADIAKCE AMD ZERO LEVEL IRRADLjU'CE

(320 BITS)

2 - MF AVERAGES (THERMOPILE EASE TEMP)

(800 BITS)

2

 ~ MF AVERAGES (MODULE TES?)

( 480 BITS)

2 - MF AVERAGES (SOLAR CH. ASSEMBLY)

(400 BITS)

[GAMMA ANCLE AT CNTR. OF SOLAR PEAK (If.

STATUS SUMMARY (2 OF TIMS)

(784 BITS)

[SUN- EARTH DISTANCE

STATISTICS TOR ERB IXSTRIMENT TEiffERATURiS

(4096 BITS)

IN A. U. (16)

STATISTICS FOR SCAN Cll. COUNTS 111 SPACE AND B. C.

(1536 BITS)

SW SCAS C1IS. NET COUNT RATIOS

(64 BITS)

S a-\JOR FRAMES C.«DL\ > 20" (16) LKSC CALIBF-\TIOSS

SPACE LOOKS DURTNC SCAK (16) MAJOR FRAZ-ES CHS.

(16)

11, 12 OPEN (16)

•1AJOR FRAMES CHS. 11, 12 CLOSED (16) SPARES (16 BITS)

STATISTICS FOR CAIN RATIOS (2683 BITS)

L.W. CALIBRATION INTERCEPTS (256 BITS)

L.W. CALIBRATION SLOPES

 (256 BITS)

CH. 11 IRRADIAKCC WITH SHUTTERS 0?EM, 12 W (64 BITS)

ai. 12 irjiAui.-u;cE WITH SHUTTERS OPEN ,12 u (64 BITS)

CH. 12 - CH. 11 IRRADIANCE WITH SHUTTERS CTTT., 12W (64 BITS)

CH. 11 IRRADIA::CE WITH SHUTTE?. CLOSED (64 BITS)

ai. 12 IKRADIASCE WITH SiiUTTER CLOSED (64 BITS)

Cll. 12 - Ql. 11 IRRADImiCE l.'ITII SHUTTLR. CLOSED (04 UITS)

DIGITAL A WUIIDS ( 5^ BITS)

STATISTICS TOK GIMli.iJ. SL/IH !L\Ti: (64 UITi)

384

1184

1504

2304

2784

3200

4000

8096

9G32

9696

9728

9760

9792

12480

12736

12992

13056

13120

13184

13248

13312

13376

13888

13952

FIGURE VI-4. Logical Record Format for Orbital Summary

-40-
439

441

443

445

451

457

461

463

465

467

469

1682

MSB

32

LSB

16 1

CHANNEL 11 & 12 SHUTTER TEMEPRATURES STATISTICS (96 BITS)

SPARES (16)

CHANNEL 11 IRRADIANCE STATISTICS SHUTTER OPEN (48 BITS)

SPARES (16)

CHANNEL 12 IRRADIANCE STATISTICS SHUTTER OPEN (48 BITS)

SPARES (16)

CHANNEL 12- CHANNEL 11 IRRADIANCE STATISTICS SHUTTER OPEN (48 BITS)

CALIBRATION INTERCEPT STATISTICS (192 BITS)

CALIBRATION SLOPE STATISTICS (192 BITS)

CHANNEL 11 IRRADIANCE WITH SHUTTERS OPEN, 12N (64 BITS)

CHANNEL 12 IRRADIANCE WITH SHUTTERS OPEN 12N (6 BITS)

CHANNEL 12-CHANNEL 11 IRRADIANCE WITH SHUTTERS OP.EN , J.2N (48 BITS)

SPARES (16 BITS)

CHANNEL 11 POPULATION AND SUM OF SQUARES SHUTTERS OPEN, 12N (48 SITS)

SPARES (16 BITS)

CTANNEL 12 POPULATION AND SUM OF THE

SPARES (16 BITS)

CHANNEL 12-11 POPULATION AND SUM OF

SQUARES SHUTTERS OFSX, 12N (48 BITS)

THE SQUAP.ES SHUTTERS OPEN, 12N (48 3ITS)

SPARES (38816 BITS)

14112

14176

14240

14432

14624

53824

14752

14816

14830

14944

UOOB

S3B24

1682 32 BIT WORDS

3364 16 BIT WORDS

6728 8 BIT BYTES

FIGURE VI-4. Logical Record Format for Orbital Summary

(Continued)

-41-
(10) MAJOR FRAMES PER ORBIT (16 BITS): The number of VIP

major frames in this orbit block.

(11) END YEAR (16 BITS) : The units and tens digits of the

calendar year at the end of the orbit block.

(12) END DAY OF YEAR (16 BITS) : The numeri c day of the

year (1 to 365 or 366) at end of the orbit block.

(13) END HOUR/MINUTE (16 BITS) : The GMT hour and minute

(100 x hour + minute) at the end of this orbit block.

(14) END LATITUDE (16 BITS): This is the subsatellite

longitude (-90 degrees to 90 degrees) at the end of the

orbit block (with a scale factor of 100).

(15) END LONGITUDE (16 BITS) : This is the subsatellite

longitude (-18 0 degrees to 180 degrees) at the end of

this orbit block (with a scale factor of 100).

(16) TIME AT NORTHERN TERMINATOR (16 BITS): The GMT hour

and mi nute (10 0 x hour +minute ) of the norther n

terminator crossing.

(17) TIME AT NORTHERN TERMINATOR (16 BITS): The GMT

seconds at the northern terminator crossing.

(18) TIME AT SOUTHERN TERMINATOR (16 BITS): The GMT hour

an d minute(100xhour+minute ) o f th e souther n

terminator crossing.

(19) TIME AT SOUTHERN TERMINATOR (16 BITS) : The GMT

seconds at the southern terminator crossing.

(20 ) GMT AT SATELLITE DAY (16 BITS) : The GMT hour and

minut e (10 0 x hour + minute) at the satellite night to

day transition.

(21) SECONDS AT SATELLITE DAY (16 BITS) : The seconds

portion of the GMT at the satellite nigh t to day

transition.

(22 ) GMT AT SATELLITE NIGHT (16 BITS): The GMT hour and

minut e (10 0 x hour +minute ) at the satellite day to

night transition.

(23 ) SECONDS OF SATELLITE NIGHT (16 BITS) : The seconds

portionoftheGMTatth e satellite da y t o nigh t

transition.

-42-
(24 ) GMT SOLAR PEAKS (16 BITS)* : The GMT (T Q time of

the solar channels peak signal. This word is hours and

minutes (100 x hour + minute).

(25 ) SECONDS OF SOLAR PEAK (16 BITS)* : The seconds (T Q

time) of the solar channels peak signal.

(26 ) TWO MAJOR FRAME AVERGES (10 CHANNELS X 5 TIMES X 16

BITS = 800 BITS)*: Two major frame averages in counts

for Channels 1 through 10 centered at times relative to

TQ as follows*:

V, at TQ-26 minutes

V- at Tg-13 minutes

V3 at TQ

V. at Tg+13 minutes

V- at TQ+26 minutes

(27) NET SOLAR (R ) AND ZERO (R ) LEVEL IRRADIANCE (2

E. —

PARAMETERS x 10 CHANNELS x 16 BITS = 320 BITS)*: The

net solar irradiance and the zero level irradiance:

R = V3 - 1/2 (V2 + V4) . Sv"

1

 . (STC)"1

Channels 1 through 10 and R = V,

Sv . (STC)'1, Channels 1 through 10

where

P

p = net solar irradiances

1 = two majo r frame averages of detector

outputs as described in Item 26.

R = zero level irradiance (at Tf t-26 minutes)

o u

STC = sensitivity temperature correction factor

S = channel sensitivity in a vacuum at 25°C

*This informatio n was derived usin g a coarse method and is

provided only as tentative information. A more precise method

was used in producin g the ERB Solar and Earth Flux Data Tape

(SEFDT) . A complete set of solar data is also on the SEFDT for

those who wish to develop their own algorithm.

-43-
For net solar irradiance, scale factor for Channels 1

through 5 and. 10 is 10, and for Channels 6 through 9

the scale facto r is 100. For zero level irradiance,

scale factor for Channels 1 through 5 is 10, and for

Channels 6 through 9 it is. 100.

(28 ) TWO MAJOR FRAME AVERAGE THERMOPILE BASE TEMPERTURES

(10 TEMPERATURES x 5 TIMES x 16 BITS = 800 BITS): The

two major frame average for thermopile base temperatures (Celsius) for Channels 1 through 10 at TQ-26

minutes, TQ-13 minutes, T Q , T Q + 13 minutes, and

TQ+26 minutes. All values use a scale factor of 10.

(29 ) TWO MAJOR FRAME AVERAGE MODULE TEMPERATURES ( 6

TEMPERATURES x 5 TIMES x 16 BITS = 480 BITS): The two

majo r frame average of module temperatures (Celsius)

for Channels 1 throug h 3, 6, 9, and 10 at T Q - 2 6

minutes, TQ-13 minutes, TQ, TQ+1 3 minutes, an d

TQ+16 minutes. All values use a scale factor of 10.

(30 ) TWO MAJOR FRAME AVERAGE ASSEMBLY TEMPERATURES (5

TEMPERATURES x 5 TIMES x 16 BITS = 400 BITS): The" two

majo r frame averages of fiv e solar channel assembly

temperature s at T Q - 2 6 minutes, T Q -13 minutes, T Q ,

TQ + 13 minutes, ana TQ + 26 minutes. All values use a

scale factor of 10.

(31) GAMMA ANGLE (16 BITS) : Gamma angle at the center of

the solar peak.

(32 ) STATUS SUMMARY (49 STATUS PARAMETERS x 16 BITS = 784

BITS): Status summary (percent of time) as expressed

in the orbita l summary histogram (with a scale factor

of 10). See Table VI-4.

(33 ) SUN-EARTH DISTANCE (16 BITS) : The Sun to Eart h

distance in astronomical units (with a scale factor of

10*) .

(34 ) STATISTICS OF TEMPERATURES AND ± 5V LOGIC LEVEL (64 X

4 STATISTICS x 16 BITS = 4096 BITS): Statistics of ERB

instrumen t temperature s and +_ 5V logic level (all

wit h a scale factor of 10, except the logic level

voltage whic h is wit h a scale facto r of 100). See

Table VI-5.

(35 ) STATISTIC S FOR SCA N CHANNELS ( 8 CHANNEL S X 4

STATISTIC S x 3 MODE S x 16 BITS = 1536 BITS) :

Statistics for scan channels count during : (1)

interna l black body views, (2) fixed views of space,

and (3) scanning views of space.

(36 ) SHORTWAVE SCAN NET COUNT RATIOS (4 CHANNELS x 16 BITS

= 64 BITS): Shortwave scan channels net count ratios

(wit h a scale factor of 1000 obtained during shortwave

check positions.

-44-
TABLE VI-4

Status Summary

NUMBER DESCRIPTION

1 Percent of Major Frames with DSAS Unused or

Unavailable

2 Errors in Beta Scan During Transition

3 Percent of Major Frames with Invalid Time

4 Duty Cycle DSAS Sensor #1

5 Duty Cycle DSAS Sensor #2

6 ' Duty Cycle DSAS Sensor #3

7 Duty Cycle DSAS Sensor #4

8 , Percent Major Frames with Gross Longitude Error

9 Scan On Command(5) Verified

10 PRP On

11 Electronics On Command(1) Verified

12 Scan Off Command(3) Verified

13 " Temperature Controller on Command(13) Verified

14 CH 12 FOV Narrow Command(19) Verified

15 Stepper Drives Off Command(20) Verified

16 Electronic Cal. Check Command(21) Verified

17 Reference Channels Shutters Closed Command(16)

Verified

18 CH 12 Shutter Closed Command(17) Verified

19 Scan Logic Enabled

20 PRP Number 2 On

21 Space View Command(6) Verified

22 Shortwave Check Command(7) Verified

23 Longwave Check Command(8) Verified

24 Solar Channels Left Command(10) Verified

25 Solar Channels Right Command(11) Verified

26 GO/NO GO Test Off Command(12) Verified

27 Solar Door Close Command(25) Verified

28 Errors in Scan Pattern(a)

.29 Errors in Scan Pattern(S)

30 Missing Major Frame in Scan Sequence

31 Scanning in Mode 1

-45-
TABLE VI-4

Status Summary

(Continued)

NUMBER DESCRIPTION

32 Scanning in Mode 2

33 Scanning in Mode 3

34 Scanning in Mode 4

35 Scanning in Mode 5

36 Gamma Angle Less Than -20 Degrees

37 Heat Radiator A Front Open, Rear Open

38 Heat Radiator A Front Closed, Rear Open

39 Heat Radiator A Front Open, Rear Closed

40 Heat Radiator A Front Closed, Rear Closed

41 Heat Radiator B Front Open, Rear Open

42 Heat Radiator B Front Closed, Rear Open

43 Heat Radiator B Front Open, Rear Closed

44 Heat Radiator B Front Closed, Rear Closed

45 S Band-A Transmitter On

46 S Band-B Transmitter On

47 Electronics Bit Turned On in Header Block

48 Not Used

49 Not Used

-46-
TABLE VI-5

Statistics of Temperatures

The four (4) Statistics are: MIN, MEAN, MAX, and Standard

Deviation. The first 53 temperatures refer to thermistor

data. The 54th location refers to + 5 V Logic Level. The

last lo temperatures refer, to platinum temperature data.

NUMBER DESCRIPTION

1-14 CHs 1-14 Thermopile Base

15 CH 1 Module

16 CH 2 Module

17 CH 3 Module

18 CH 6 Module •

19 CH 9 Module

20 CH 10 Module

21 CH 13 Module

22 CH 14 Module

23 CH 11 Shutter Hub

24 CH 12 Shutter Hub

25 CH 10 Port

26 CH 20 Port

27 CH 21 Port

28 CH 22 Port

29 CH 19 Baffle

30 CH 20 Baffle

31 CH 21 Baffle

32 CH 22 Baffle

33 Solar Channels Assembly Casting, Top

34 Solar Channels Assembly Casting, Bottom

35 Solar Channels Assembly Shield Attached Point

36 Solar Channels Assembly Amplifier Heat Sink

37 Earth Flux Channels Assembly, Front

38 Earth Flux Channels Assembly, Back

39 Earth Flux Channels Assembly, Heat Sink

40 Main Frame Mounting Tab, Front

41 Main Frame Mounting Tab, Back

-47-
TABLE VI-5

Statistics of Temperatures

(Continued)

NUMBER DESCRIPTION

42 Beta Gimble Bearing and Gear Box

43 Beta Gimble Motor

44 Solar Channels Assembly Drive Motors

45 Shortwave Scanning Channel Detectors

46 Alpha Sweep Gear Box and Motor

47 Chopper Motor

48 Post Amp. Synch Demod. Area

49 Power Supply Area

50 A/D Area

51 Heat Radiator

52 Remote Scan Mech. Axis Bearing

53 CH 12 FOV Stop

54 +5 Volt Logic Level

55 CH 11 Module

56 CH 12 Module

57 CH 19 Module

58 CH 20 Module

59 CH 21 Module

60 CH 22 Module

61 CH 19 Blackbody

62 CH 20 Blackbody

63 CH 21 Blackbody

64 CH 22 Blackbody

-48-
(37 ) MAJOR FRAMES (16 BITS) : The number of major frames

with a gamma angle greater than 20 degrees.

(38 ) LWSC CALIBRATIONS (16 BITS): The number of longwave

scanning channels calibrations during this orbit block.

(39 ) SPACE LOOKS (16 BITS) : The numbe r of space looks

during the orbit block.

(40 ) MAJOR FRAMES - CHANNELS 11, 12 OPEN (16 BITS): The

number of majo r frames with Channel 11 and Channel 12

open.

(41) MAJOR FRAMES - CHANNELS 11, 12 CLOSED (16 BITS): The

numbe r o~lmajo r frames with Channel 11 and Channel 12

closed.

(42 ) SPARES (16 BITS): Zero filled.

(43 ) STATISTICS FOR GAIN RATIOS (4 STATISTICS X 3 STEPS X

14 CHA.NNELS x 16 BITS = 268 8 BITS) : These are

statistics for electronic gai n r-atios (current /

prelaunch) with a scale factor of 1000.'

(44 ) CALIBRATION INTERCEPTS (4 STATISTICS X 4 CHANNELS X

16 BITS = 256 BITS): These are statistics for longwave

scan channels calibratio n intercepts (with a scale

factor of 1000).

(45 ) CALIBRATION SLOPES (4 STATISTICS x 4 CHANNELS X 16

BITS = 256 BITS) : These are statistics for longwave

scan -channels calibration slopes (with a scale factor

of 10b).

(46 ) CHANNEL 11 IRRADIANCE WITH BOTH SHUTTERS OPEN, 12W (4

STATISTICS x 16 BITS = 64 BITS): These are statistics

for Channe l 11 irradianc e wit h shutter open (with a

scale factor of 100).

(47 ) CHANNEL 12 IRRADIANCE WITH BOTH SHUTTERS OPEN, 12W (4

STATISTICS x 16 BITS = 64 BITS): These are statistics

for Channel 12 irradiance with the shutter open (with a

scale factor of 100).

(48 ) CHANNEL 12 - CHANNEL 11 IRRADIANCE WITH BOTH SHUTTERS

OPEN , 12W (4 STATISTICS x 16 BITS = 64 BITS): These

are statistics for Channel 12 - Channel 11 irradiance

with both shutters open (with a scale factor of 100).

(49 ) CHANNE L 1 1 IRRADIANC E WITH SHUTTER CLOSED ( 4

STATISTICS x 16 BITS = 64 BITS) : These are the

statistics for Channel 11 irradiance with the shutter

closed (with a scale factor of 100).

-49-
(50 ) CHANNE L 1 2 IRRADIANC E WITH SHUTTER CLOSED ( 4

STATISTICS x 16 BITS = 64 BITS) : These are the

statistics for Channel 12 irradiance with the shutter

closed (with a scale factor of 100).

(51) CHANNEL 12 - CHANNEL 11 IRRADIANCE WITH SHUTTER CLOSED

(4 STATISTICS x 16 BITS = 64 BITS) : These are the

statistics for Channel 12 - Channel 11 irradiance with

the shutter closed (with a scale factor of 100).

(.52) EVEN DIGITAL WORDS (8 CHANNELS x 4 STATISTICS x 16

BITS = 512 BITS) : Orbital average for the eight even

digita l words. See Section VI-B, Item 43 for a

description of these words.

(53 ) GIMBAL SLEW RATE (4 STATISTICS X 16 BITS = 64 BITS):

These words are statistics for the gimbal slew rate.

(54 ) CHANNE L 11 AND CHANNEL 12 SHUTTER TEMPERATURE

STATISTICS (2 CHANNEL S X 16 BITS + 2 CHANNELS x 32

BITS = 96 BITS): The number of samples (16 bits) for

Channe l 11 and Channel 12 shutter temperatures and the

sum of square (32 bits) for Channel 11 and Channel 12

shutter tempertures, sum of the squares, scaled by 10.

(55) SPARES (16 BITS): Zero filled.

(56 ) CHANNEL 11 IRRADIANCE STATISTICS WITH SHUTTER OPEN,

12W (48 BITS): The numbe r of samples (16 bits) and

the sum of the squares (32 bits) for the Channel 11

irradianc e when the shutte r is open , sum of the

squares, scaled by 100.

(57 ) SPARES (16 BITS): Zero filled.

(58) CHANNEL 12 IRRADIANCE STATISTICS WITH SHUTTER OPEN,

12W (48 BITS) : The numbe r of samples (16 bits) and

the sum of the square s (32 bits) for Channe l 12

irradianc e when the shutte r is open , sum of the

squares, scaled by 100.

(60 ) CHANNEL 12 - CHANNE L 11 IRRADIANCE STATISTICS WITH

SHUTTER OPEN (48 BITS) : The numbe r of samples (16

bits) and the sume of the squares (32 bits) for Channel

12 - Channe l 11 irradiance with the shutter is open,

sum of the squares, scaled by 100.

(61) CALIBRATIO N INTERCEPT STATISTICS (4 CHANNEL S X 16

BITS + 4 CHANNELS x 32 BITS = 192 BITS): The number of

samples (16 bits) for the longwave scan channels

calibratio n intercepts, and the sum of the squares for

the longwave calibration intercepts (32 bits), sum of

squares, scaled by 1000.

-50-
(62 ) CALIBRATION SLOPE STATISTICS (4 CHANNELS X 16 BITS +

4 CHANNELS x 32 BITS = 192 BITS): The numbe r of

samples (16 bits) for the longwave scan channels

calibration slopes, and the sum of the squares for the

longwave calibration intercepts (32 bits) sum of the

squares scaled by 10 .

(63 ) CHANNEL 11 IRRADIANCE WITH BOTH SHUTTERS OPEN, 12N (4

STATISTICS x 16 BITS = 64 BITS): These are statistics

for Channe l 11 irradiance with both shutters open and

Channe l 12 stopped to narrow (with a scale factor of

100).

(64 ) CHANNEL 12 IRRADIANCE WITH BOTH SHUTTERS OPEN, 12N (4

STATISTICS x 16 BITS = 64 BITS): These are statistics

for Channe l 12 irradiance with both shutters open and

Channe l 12 stopped to narrow (with a scale factor of

100).

(65 ) CHANNEL 12 - CHANNEL 11 IRRADIANCE WITH BOTH SHUTTERS

OPEN, 12N (4 STATISTICS x 16 BITS = 64 BITS): These

are statistics for Channel 12 - Channel 11 irradiance

with both shutters open and Channe l 12 stopped to'

narrow (with a scale factor of 100).

(66 ) SPARES (16 BITS): Zero filled.

(67) CHANNEL 11 IRRADIANCE STATISTICS WITH BOTH SHUTTERS

OPEN, 12N (48 BITS): The number of samples (16 bits)

and the sum of the squares (32 bits) associated with

Item 63.

(68 ) SPARES (16 BITS): Zero filled.

(69 ) CHANNEL 12 IRRADIANCE STATISTICS WITH BOTH SHUTTERS

OPEN , 12N (48 BITS) : The number of samples (16 bits)

and the sum of the squares (32 bits) associated with

Item 64.

(70 ) SPARES (16 BITS): Zero filled.

(71) CHANNEL 12 - CHANNE L 11 IRRADIANCE STATISTICS WITH

BOTH SHUTTERS OPEN , 12N (48 BITS) : The number of

samples (16 bits) and the sum of the squares (32 bits)

associated with Item 65.

(72 ) SPARES (38,81 6 BITS) : These bits are used to fill

out the standard logical record size. These bits will

be set to zero.

-51-
VII. CALIBRATION RECORD/FILE

This fil e contain s a table of suggested adjustments to the ERB

radiance s and irradiance s (Calibratio n Adjustment Table) for

Channels 1 throug h IOC, 11, 12, 12N,1 and 13 through 22. These

adjustmen t factors are computed after the MAT has been produced

and are added to MAT before archiving. The description of the

constituent items are as follows:

( 1) PHYSICAL RECORD NUMBER (12 BITS): This number will

be 1.

( 2) RECORD ID (8 BITS): Identifie s record type and the

last record writte n in a file and records in the last

fil e on the tape. The MSB of the first logical record

of the last physical record will be set to "1", if that

physical record is the last one written in the file.

The second most MSB will be set on all logical records

in the last file on the tape. The record type will use

the six LSB of that byte to identify the type of record

being read: 11 = LOGICAL DATA RECORD, 12 = ORBITAL

SUMMARY RECORD , 13 = DAIL Y SUMMAR Y RECORD , 14 =

CALIBRATION ADJUSTMENT TABLE RECORD.

( 3) LOGICAL RECORD NUMBER (8 BITS): This identifies the

logical record within a physical record.

( 4) START YEAR (16 BITS ) :

calendar year of the

apply.

the

the adjustments

The units and tens digits of

start of the period for which

( 5) START MONTH (16 BITS): The month (1-12) of the start

of the period for which the adjustments apply.

( 6) START DAY (16 BITS):

of the period for which

( 7) STOP YEAR

The day of month of

the adjustments apply.

the start

(16 BITS ) :

calenda r year of

apply.

the

the adjustments

The units and tens digits of

the end of the period for which

( 8) STOP MONTH (16 BITS): The month (1-12) of the end of

the period for which the adjustments apply.

( 9) STOP DAY (16 BITS): The day of month of the end of

the period for which the adjustments apply.

(10) GENERATION YEAR (16 BITS): The units and tens digit

of the year in which Calibration Adjustment Table was

generated.

(11) GENERATION MONTH (16 BITS): The month (1-12) in

which the Calibration Adjustment Table was generated.

(12) GENERATION DAY (16 BITS): The day of month on which

the Calibration Adjustment Table was generted.

-52-
t

i

•>

3

4

S

6

7-18

19-29

30-41

42-225

226

236

,SB LSB

32 28 24 22 20 18 16 14 12 10 8 6 4-2 1

Physical Record No. (12) 4 Spares

Year - Start of Period (16)

Oav - Start of Period (16)

Month - End of Period (16)

Year - Gen. Date (16)

Dav - Gen. Date (161

Channel Adjustment Slopes 368 Bits

Channel Adjustment intercepts 368

Channel Adjustment Uncertainties 3

rile

bount Record I.D.

Month - Start

Year - End of

Loqical Rec . No .

of Period (16)

Period (16)

Dav - End of Period (16)

Month - Gen. Date (16)

Scares - (16)

Bits

68 Bits

Spares 16 Bits

Channel Adjustment Table Comments 5888 Bits

Spares (288)

12

64

96

128

160

192

560

928

1312

7200

7488

208

234

312

624

936

36 BIT WORDS

32 BIT WORDS

WORDS

WORDS

WORDS

24 BIT

12 BIT

8 BIT

FIGURE VII-1. ERB MAT Calibration Adjustment Table

Record Format

-53-
(13) ADJUSTMENT SLOPES (23 CHANNELS x 16 BITS = 368 BITS):

The adjustmen t slopes A, to be applied to the ERB

channe l radian c e s: S*^= A, S + A- wher e S* =

corrected channel value, S = uncorrectea channel value.

The slopes are stored in the following order: Channels

1 through IOC, 11, 12, 12N, 13 throug h 22. The

adjustmen t slopes are stored with a scale factor of

1000.

(14) ADJUSTMENT INTERCEPTS (23 CHANNELS X 16 BITS = 368

BITS) : The adjustment intercepts A- to be applied to

the ERB channe l radiances: S* = A, S + A- where S*

= corrected channe l radiance, S = uncorrected channel

radiance . The intercepts are stored in the following

order: Channels 1 through IOC, 11, 12, 12N, 13 through

22. The adjustment intercepts are stored with a scale

factor of 10.

(15) ADJUSTMENT UNCERTAINTIES (23 CHANNELS x 16 BITS = 368

BITS): The percent uncertainty of the channel values

afte r the correction has been applied (scaled by 10).

The uncertaintie s are stored in the following, order:

Channels 1 through IOC, 11, 12, 12N, 13 through 22.

(16) ADJUSTMENT COMMENTS (32 CHARACTERS X 23 CHANNELS X 8

BITS): A comment fiel d of 32 characters for each of

the 23 adjustments above.

-54-
APPENDIX A.

MAT Tape Length Estimate

1. Standard Header =6"

2. Data File

394 VIPS/Orbit

1 VIP/Logical Record

2 Logical Records/Physical Record

For an orbit have:

394 VIPS + 1 Orbital Summary Record + VIP or Daily

Summary Record or Zero-filled Record

= 396 Logical Record/Orbit = 198 Physical Record/Orbit

1 Physical Record = 13,464 bytes

For 1600 BPI tape, 1 physical record = 8.415"

Length of tape for orbit = 198 physical record x 8.415" +

198 IRG x 0.65" » 1794.9"

Maximum of 14 orbits/day = 25,128.2"/data file

3. CAT File

900 bytes long. This takes about .5" of tape

Total length of tape = 25,128.2" + 6" + .5" = 25,134.7" =

2094.5'

A-l
BIBLIOGRAPHIC DATA SHEET

1. Report No. 2. Government Accession No. 3. Recipient's Catalog No.

4. Title and Subtitle

ERB Master Archival Tape

Specification No. T 134081 ERB MAT

5. Report Date

May 1984

6. Performing Organization Code

910

7. Author(s)

Revised by S. T. Nutter, Jr.

8. Performing Organization Report No.

9. Performing Organization Name and Address

Goddard Space Flight Center

Greenbelt, Maryland 20771

10. Work Unit No.

11. Contract or Grant No.

12. Sponsoring Agency Name and Address

National Aeronautics and Space Administration

Washington, DC 20546

13. Type of Report and Period Covered

Reference Publication

14. Sponsoring Agency Code

NASA Goddard

15. Supplementary Notes

This revision represents the current ERB Archival Tape Specifications.

16. Abstract

ERB MAT Tapes are generated by the ERB MATGEN software using the IBM 3081

computer system operated by the Science and Applications Computer

Center at Goddard Space Flight Center. All MATs are 9-track and MAT

data will be in ascending time order. The gross tape format for

Nimbus Year-1 and Year-2 MATs is different from the format of MATs

starting with Year-3. MATs from the first two years will contain one

day's worth of data while all other MATs will contain multiple day's

worth of data stacked onto the tapes.

17. Key Words (Selected by Author(s))

Nimbus-7 ERB Processing

Master Tape Specification

ERB MAT

18. Distribution Statement

Unlimited

19. Security Classif. (of this report)

Unclassified

20. Security Classif. (of this page)

Unclassified

21. No. of Pages

55

22. Price'

"For sale by the National Technical Information Service, Springfield. Virginia on]

 r ] GSFC 25-44 (10/7/)