DSP Operation Management Center (DOMC)   Systems Solutions Document CSSAR, July. 2002

Content INTRODUCTION DOMC OVERVIEW DATA DEFINITION INTERFACE BRIEF of DITS

1.INTRODUCTION 1.1 Purpose of This Document Outlines the preliminary system architecture for DOMC Providing a basis for discussion among the project participants.

1.INTRODUCTION 1.2 Reference Documents [CRID] DSP Command Request Interface Document (CRID), DSP-RAL-ID-0001, latest issue [DDID] DSDS Data Delivery Interface Document (DDID), DSP-IWF-ID-0001, latest issue Double Star Ground Data System System and Implementation Document, SCI-C/13445/GK

2 DOMC OVERVIEW 2.1 Top-Level Requirements for DOMC Double Star operational management; Downlink data acquisition Level 0 – Level 1 data product generation Integrated payload system testing support

2 DOMC OVERVIEW 2.2 External Interface DOMC EPOS DSAS XSCC VillaSpa2 Spacecraft EPOS VillaSpa2 RD UD SCHK SCHK,ORB CSEQ DP, AUX OBRQ VPN

2 DOMC OVERVIEW 2.3 System Components DOMC GS OCS DPS DITS For P/L For P/L Operation Management For P/L Integration Test

2 DOMC OVERVIEW GS – Ground Station Downlink raw data receiving Recording all the received data Transfer received data to OCS and DPS Ground stations Miyun (China) VillaSpa2 (Spain) Shanghai (China)

2 DOMC OVERVIEW OCS - Operation and Control system P/L operation plan & schedule composing according OBRQ (Observation Request ) P/L house keeping data processing, monitoring and P/L status evaluation; Spacecraft status monitor and analysis; Memory load data code generation; Send Command Sequence data to XSCC.

2 DOMC OVERVIEW DPS – Data Pre-processing System Data product generation ( Level 0 and Level 1 ) Auxiliary data generation ( attitude, spin, ephemeris.etc) Data storage management ( Long term ) Data delivery to DSAS

2 DOMC OVERVIEW DITS – DSP Integration Test System Introduced in section 5.

3 DATA DIFINITION 3.1 Input Data Flow RD - Downlink raw data, the bit-stream raw data file received by ground station. SCHK – Spacecraft house keeping telemetry. ORB - orbit elements. OBRQ – Observation request delivered out by DSAS, which has been confirmed with EPOS DOMC DSP DSAS XSCC Spacecraft EPOS VillaSpa2 RD UD SCHK SCHK,ORB CSEQ DP, AUX OBRQ

3 DATA DIFINITION 3.2 Output Data Flow ORB - Orbit elements; CSEQ - Command and memory load data sequence; DP - Data product with pre-processed less than level1; AUX - The auxiliary data; DOMC DSP DSAS XSCC Spacecraft EPOS VillaSpa2 RD UD SCHK SCHK,ORB CSEQ DP, AUX OBRQ

3 DATA DIFINITION 3.3 Data Product Payload Data Product Level 0 Raw telemetry data, as received by the ground stations in Europe and China; Level 1 Raw telemetry data, sorted in time and by instrument

3 DATA DIFINITION 3.3 Data Product Auxiliary Data Product Orbit elements SATT - Spacecraft Attitude and Spin Rate TCAL - Time Calibration File CMDF - Command History File STEF - Short Term Event File

4 INTERFACE 4.1 DOMC – DSAS OCS DSOC DPS DSDS GS DITS OBRQ DP, AUX LAN, Media DPS DP, AUX DSDS GS DITS DSAS DOMC

4 INTERFACE 4.2 DOMC – VILLASPA2 OCS RD DPS VPN GS DITS VillaSpa2 DOMC

4 INTERFACE 4.3 DOMC – XSCC OCS DPS GS DITS CSEQ SCHK, ORB XSCC DOMC MODEM SCHK, ORB DPS GS DITS XSCC DOMC

4 INTERFACE 4.4 DOMC – Satellite OCS DPS GS RD DITS Satellite DOMC

5 BRIEF of DITS (DSP Integration Test System) 5.1 Target Support Payload ON-BENCH integration test; As part of spacecraft ground test system (SCOE), support payload system test in whole satellite test; As part of spacecraft ground test system, support the payload system test in launch field.

5 BRIEF of DITS (DSP Integration Test System) 5.2 Pre-Integration Test Connection Topology LAN 1553B Data Bus S Band Transmitter Remote Terminal RT2 High Speed Multiplexer RT1 Payload Power Distributor RT4 FGM Payload Bus Controller PEACE ASPOC STAFF HIA S/C Simulator RT5 Payload Interface Channel Equipment EGSE DITS Network & Terminals PDMS Solid State Recorder RT3 Payload DITS

5 BRIEF of DITS (DSP Integration Test System) 5.3 DITS Components … Test Control Computer Channel Device RD processing computer Data Server Display Printer EGSE Switch Hub Power Supply Spacecraft Simulator +28V SCHK telemetry Command IEEE488 Solar Reference Pulse DITS PDMS Memory Load

5 BRIEF of DITS (DSP Integration Test System) 5.3 DITS Components (Continue) Spacecraft Simulator Output Power supply ( +28V ) to PDMS Solar reference pulse to PDMS Command, memory load to PDMS. TCP package for SCHK data to Test Control Computer. Input House keeping telemetry collected from PDMS Command and memory load from Test Control Computer

5 BRIEF of DITS (DSP Integration Test System) 5.3 DITS Component (Continue) Test Control Computer Implement the Test Control File. Receive SCHK telemetry from Spacecraft Simulator and multicast them to the computer on the local network. Operation Method Automatically operation. Manually operation

5 BRIEF of DITS (DSP Integration Test System) 5.3 DITS Component (Continue) RD Processing Computer Acquisition raw data into computer from the Channel Device. Processing the raw data into HK data and Science data Multicast the HK data in real-time in the LAN.

5 BRIEF of DITS (DSP Integration Test System) 5.3 DITS Component (Continue) Display Computer Display the Spacecraft house keeping telemetry in real-time; Display the part of the payload HK data in real-time, and can playback all data; EGSE’s computer could be a Display Computer after joining into the LAN; In order to display the downlink data correctly, a software offered by the DITS must be installed on the new joint computer

5 BRIEF of DITS (DSP Integration Test System) 5.3 DITS Component (Continue) Data Server Offer the data archiving service; Offer All data’s storage management service; Offer the data query, index, download and playback service to each computer within the LAN, via Web browser or shared disk (directory);

5 BRIEF of DITS (DSP Integration Test System) 5.4 Interface to EGSE Environment and Connection Connection Local Area Network Protocol TCP/IP, HTTP OS Microsoft Windows 2000

5 BRIEF of DITS (DSP Integration Test System) 5.4 Interface to EGSE File format definition File Name component <VCDU>_<P/L name>_<Package tip>_<Level>_<ID>_<Time string>.<ext> VCDU – the virtual channel ID CA Data transferred in CCSDS virtual channel A CB Data transferred in CCSDS virtual channel B C1 Data transferred in CCSDS virtual low –rate channel CC The source raw data acquired from the Channel Device YC Spacecraft house keeping channel XW The file that Spacecraft Simulator direct archived XX The transfer channel ignored

5 BRIEF of DITS (DSP Integration Test System) 5.4 Interface to EGSE File format definition (continued) File Name component <VCDU>_<P/L name>_<Package tip>_<Level>_<ID>_<Time string>.<ext> P/L name – the name for each Payload FGM HEED STAFF HIA ASPOC PEACE

5 BRIEF of DITS (DSP Integration Test System) 5.4 Interface to EGSE File format definition (continued) File Content HK data file Science data file File header 15 bytes header according to DDID

5 BRIEF of DITS (DSP Integration Test System) 5.4 Interface to EGSE Data Access Inquiry and download via Web Page All data stored in Data Server could be accessed. The Web Page style like the following 2 Pictures.

5 BRIEF of DITS (DSP Integration Test System)

5 BRIEF of DITS (DSP Integration Test System)

DSP Operation Management Center (DOMC) DSAS XSCC Spacecraft EPOS VillaSpa2 RD UD SCHK SCHK,ORB CSEQ DP, AUX OBRQ Thanks for Your Attention!