# Presentation: 391490

## NPP High Rate Data (HRD) Broadcast:Preparing for the Future

**NPP High Rate Data (HRD) Broadcast:****Preparing for the Future**

**Timothy Trenkle**
**Patrick Coronado**
**October 6****, 2005**

## Agenda

**NPP High Rate Data Broadcast (HRD) Overview**
**Physical Layer Characteristics**
**Transport Layer Characteristics**
**Application Layer Characteristics**
**HRD Pre-launch Integration & Test Activities**
**Preparing for NPP HRD**

## Agenda

**NPP High Rate Data Broadcast (HRD) Overview**
**Physical Layer Characteristics**
**Transport Layer Characteristics**
**Application Layer Characteristics**
**HRD Pre-launch Integration & Test Activities**
**Preparing for NPP HRD**

## NPP HRD Overview

**NPP Satellite provides a continuous, real-time, high rate data (HRD) broadcast containing:**
**Instrument Science Data**
**Instrument Engineering Data**
**Instrument Housekeeping Data**
**Spacecraft Housekeeping Data**
**The HRD broadcast is intended for direct readout users to exploit NPP mission data as a continuation of EOS Terra, Aqua, & Aura mission data and in preparation for NPOESS**
**The HRD broadcast interface is described in three layers**
**Physical**
**Transport**
**Application**
**Investment in direct readout station technology was a driving factor in the development of the NPP HRD broadcast characteristics**
**Physical and transport layers are similar to EOS and NPOESS**
**NPP HRD is unencrypted and free to access**

## NPP Nadir Deck View

**HRD antenna**

**VIIRS**

**CrIS**

**ATMS**

**OMPS**

## NPP HRD Overview – Physical Layer

**The physical layer describes the RF characteristics of the HRD broadcast and is documented in the NPP Spacecraft HRD Interface Control Document  (ICD) to the Direct Broadcast Stations (GSFC 429-03-02-24, May 10, 2004)**
**Frequency: 7812.0 MHz +/- 0.03 MHz (X-Band)**
**Data Rate: 15 Mbps**
**Format / Encoding: NRZ-M / Convolutional**
**Modulation: QPSK (1:1 power ratio)**
**Antenna: Earth-shaped omni**
**Polarization: Right hand circular**
**Margin: > 1.5 dB**
**Effective bit error rate: 1x10^-8**

## NPP HRD Overview – Physical Layer

## NPP HRD Overview – Transport Layer

**The transport layer describes the transfer protocol characteristics of the HRD broadcast and is documented in the NPP X-Band Data Format ICD (GSFC 429-04-02-28, August 23, 2004)**
**Service Protocol: Consultative Committee for Space Data Systems (CCSDS) Grade 2 telemetry service**
**Error detection and correction: Reed-Solomon (255, 223, Interleave depth = 4)**

| VCID | Virtual Channel Content | Description |
| --- | --- | --- |
| 0 | Satellite Housekeeping Data | Satellite HSK data common to both SMD and HRD |
| 1 | ATMS RDR Science/Cal/Eng | ATMS mission data common to both SMD and HRD |
| 4 | ATMS RDR Science/Cal/Eng | ATMS mission data specific to HRD |
| 6 | CrIS Science/Cal/Eng | CrIS mission data common to both SMD and HRD |
| 9 | CrIS Science/Cal/Eng | CrIS mission data specific to HRD |
| 11 | OMPS Science/Cal/Eng | OMPS mission data common to both SMD and HRD |
| 14 | OMPS Science/Cal/Eng | OMPS mission data specific to HRD |
| 16 | VIIRS Science/Cal/Eng | VIIRS mission data common to both SMD and HRD |
| 19 | VIIRS Science/Cal/Eng | VIIRS mission data specific to HRD |
| 63 | Fill Data | Fill VCDU to maintain 15-Mbps HRD rate |

## NPP HRD Overview – Application Layer

**The application layer describes the characteristics of each mission data packet type contained in the HRD broadcast and is documented in the NPP Mission Data Format Control Book (GSFC 429-05-02-42, being baselined)**

| Packet APID Range |  | Packet |
| --- | --- | --- |
| Decimal | Hex | Source |
| 0 – 52  | 0 – 34  | S/C |
| 512 - 531 | 200 - 213 | ATMS |
| 544 - 566 | 220 - 236 | OMPS |
| 768 - 856 | 300 - 358 | VIIRS |
| 1280 - 1402 | 500 - 57A | CrIS |

## Agenda

**NPP High Rate Data Broadcast (HRD) Overview**
**Physical Layer Characteristics**
**Transport Layer Characteristics**
**Application Layer Characteristics**
**HRD Pre-launch Integration & Test Activities**
**Preparing for NPP HRD**

##  SI&T Methodology Overview (cont.)

** ****SI&T Methodology Overview (cont.)**

**Element**
**Verification**

**Segment**
**Verification**

**Space/Ground**
**System**
**Verification**

**On-Orbit**
**Verification**

**PRE-LAUNCH**

** ****Conducted by   **
**   ****segment supplier **
** ****Integrated element  **
**   ****verification**
** ****Verify I/Fs between **
**  ****elements**
**  ****(intra-segment)**

** ****Coordinated by **
**   ****Govt **
** ****Integrated  **
**   ****segments**
**   ****verification**
** ****System**
**   ****performance & **
**   ****thread testing**
** ****Verify I/Fs**
**  ****between segments **
**  ****(inter-segment)**
** ****NPP Compatibility    **
**   ****Test (NCTs)**

** ****Conducted by  **
**   ****supplier **
** ****Integrated   **
**   ****component**
**   ****verification**
** ****Govt acceptance**
**   ****test prior to**
**   ****delivery (opt)**

** ****Coordinated by **
**   ****Govt/Ops**
** ****On-orbit verification**
**   ****- Satellite activation **
**          ****(~90 days)**
**   ****- Post-activation **
**      ****verification**

**LAUNCH**

**ON-ORBIT**

**Mission Readiness**
**Verification**

** ****Coordinated by **
**   ****Govt/Ops**
** ****Integrated system**
**  ****verification**
**   ****- Operations Readiness **
**       ****(training, procedures, **
**       ****simulations)**
**   ****- Mission Readiness **
**       ****(Operator certification,**
**       ****System I&T activities) **
**   ****- Mission Certification **
**         ****(Ops Readiness Test)**
**   ****- External I/F, end-to-end, **
**  ****performance**

_**System Hierarchy**_
**NPP System**
**   ****- Segments**
**      ****- Elements   **
**         ****- Components**

**System I&T **

**Mission Readiness **

## NPP System Level Test Categories

** ****Functional Thread Tests (FTTs)**
** ****These tests have their origins in the NPP Concept of Operations and may serve as prerequisites to NCTs or may be included in an NCT**
** ****Interface Confidence Tests (ICTs)**
** ****Interface Confidence Tests cross segments, developers, and organizations and focus on functionality, confirming the logical interface and data flows, including the formats in an operational configuration**
** ****NPP Compatibility Tests (NCTs)**
** ****NCTs are tests defined to exercise the flight and ground interactions.  Each NCT is comprised of functional thread and interface tests that provide a continuing higher degree of confidence leading up to operational readiness**

## NPP System Integration Flow

**NCT 2A**

**NCT 2B**

**NCT 3**

**NCT 4**

**ORT**

**System Tests**

**ATMS**

**CrIS**

**OMPS**

**VIIRS**

**1394**

**Satellite**

**C3S**

**IDPS**

**ADS/CLASS**

**Ship & L**

**TVAC**

**1.3 FAT**

**1.4 SAT**

**D SAT**

**1.3 Qual**

**1.3 RFR**

**1.4 FAT**

**NESDIS SAT**

**AFWA SAT**

**Sustainment**

**Sustainment**

**SDS**

**SD3 I&T**

**SDS SAT**

**PEATE Elements**

**4.0**

**4.1**

**4.2**

**Spacecraft**

**FPGA Retro**

**EIT2 & Fixes**

- Space Segment Integration

**NCT 2C**

## NPP Compatibility Tests

_**NCTs (Flight/Ground Compatibility)**_
** ****NCT1 - Spacecraft prior to satellite I&T start (December 2004)**
**  ****Command database checkout and simple command and telemetry check   **
** ****	**
**NCT2A – ATMS EDU and OMPS Brass Board integrated with Spacecraft (August 2005)**** **
** ****All command and telemetry rates verified, SSR exercised**
**NCT2B – ATMS EDU and CrIS EDU integrated with Spacecraft (January 2006)**
** ****Selected command and telemetry rates, cal table load exercised**
**NCT2C – ATMS FM, CrIS FM, and VIIRS EDU integrated with Spacecraft (July 2006)**
**Execute partial mission data handling propagating data through ground system**
**NCT3 – all 4 flight sensors integrated with Spacecraft (August 2007)**
** ****Execute nominal mission data handling propagating data through ground system**
**NCT4 – all 4 flight sensors integrated with Spacecraft (January 2008)**
** ****Execute end-to-end mission data handling throughout the entire flight / ground system with operations staff in place**

**BOLD**** Text indicates use/participation of HRD**

## Agenda

**NPP High Rate Data Broadcast (HRD) Overview**
**Physical Layer Characteristics**
**Transport Layer Characteristics**
**Application Layer Characteristics**
**HRD Pre-launch Integration & Test Activities**
**Preparing for NPP HRD**