Operations Manfred Bester Operations Ground Systems Space Sciences
Operations Manfred Bester Operations & Ground Systems Space Sciences Laboratory University of California, Berkeley TRIO-CINEMA 1 UCB, 2/8/2010
Operations Agenda Concept of Operations Ground System Design Software Tools Verification & Validation Pre-launch Testing Normal Science Operations Issues TRIO-CINEMA 2 UCB, 2/8/2010
Concept of Operations • Concept of Operations − Mission orbit Spin stabilized spacecraft Baseline orbit 650 km circular at 72° inclination − Communications and pass coverage Communications via S-band (TLM) and UHF (CMD) Typically 4 passes/day with 30 min access time Tracking via TLEs downloaded from USSTRATCOM − Data recovery Store-and-forward scheme, downlink at 1 Mbps Recoverable science data volume 760 Mbits/day − Ground segment MOC and ground station located at UCB/SSL Use heritage command & control system (ITOS) TRIO-CINEMA 3 UCB, 2/8/2010
CINEMA Ground Track TRIO-CINEMA 4 UCB, 2/8/2010
MOC Systems & Interfaces TRIO-CINEMA 5 § CINEMA ground system is modeled after the Nu. STAR ground system § Berkeley Ground Station is primary for CINEMA § CINEMA may also use the Integrated Test and Operations System (ITOS) for spacecraft command control § Most internal MOC systems and interfaces required for CINEMA are functional already § Flight dynamics product generation and pass scheduling are part of multimission operations system UCB, 2/8/2010
MOC Major Software Tools MOC - Major Software Tools Tool Heritage Function Method of Verification ITOS FAST, RHESSI, THEMIS, Nu. STAR Real-time telemetry acquisition and decommutation, real-time commanding and table uploads, limit checking Telemetry flows from spacecraft, command flows to spacecraft, testing during I&T BFDS FAST, RHESSI, CHIPS, THEMIS, Nu. STAR Generation of flight dynamics products, orbit analysis, pass scheduling, control center automation, real-time data flow control, 3 -D orbit visualization, based on Sat. Track Suite Comparison with already operating missions, testing and simulations, end-toend command telemetry data flow tests BTAPS THEMIS, Nu. STAR Telemetry ingest into My. SQL databases, creation of trend plots Telemetry flows from spacecraft, testing during I&T BMPS THEMIS, Nu. STAR ATS table generation Test at MOC using CINEMA products BEARS FAST, RHESSI, THEMIS, Nu. STAR Emergency and anomaly notification and response Test with telemetry flows from spacecraft LZP FAST, RHESSI, THEMIS, Nu. STAR Level 0 processing, local data archiving End-to-end data flows, testing of processing pipeline TRIO-CINEMA 6 UCB, 2/8/2010
ITOS Configuration & Testing • ITOS Configuration – Configure “databases” for telemetry and command – Key strategy is to use standard CCSDS frames early in the development phase to get as close to the flight configuration as early as possible in the program • ITOS Data Flows and Interface Testing – Exchange of telemetry and command data tested during Cube. Sat integration – Setup also allows mission simulations where flight controllers talk to the spacecraft during Cube. Sat integration as if it was on orbit already TRIO-CINEMA 7 UCB, 2/8/2010
Verification & Validation • Verification & Validation Approach – – Purpose is to verify and validate all requirements Follow test-like-you-fly philosophy Exercise all ground systems functions and interfaces Train and certify operations team members • Mission Readiness Testing – Organized similar to flight hardware development and testing • • • Component level Box level Subsystem level System level Full Cube. Sat level – Clearly defined pass/fail criteria – Used to track progress and document discrepancies – Retest all cases where discrepancies are observed TRIO-CINEMA 8 UCB, 2/8/2010
Pre-launch Operations • Pre-launch Operations – End-to-end tests with all network elements • Data flows with Berkeley Ground Station • Flight dynamics with download of TLEs (USSTRATCOM) • Voice loop checkout – Procedure testing and validation • Launch & early orbit operations • Normal operations • Contingency operations – Launch and mission simulations with green card exercises • Practice of anomaly detection and recovery – Dress rehearsals • Multiple cycles of launch readiness test runs TRIO-CINEMA 9 UCB, 2/8/2010
Normal Science Operations • Mission Planning – Pass schedule planning – ACS versus science operations timeline – Command sequence load generation • Spacecraft Command Control – – – – Spacecraft health and safety monitoring and trending Recovery of science and engineering data Command sequence load uplink twice per week Ephemeris uploads Clock correlation Instrument configuration and calibration Response to anomalies TRIO-CINEMA 10 UCB, 2/8/2010
Issues • Ground Data System Try to use as much heritage as possible, but not much progress made • Flight Ground Interface Control Document Need to define frame formats and communications protocols • RF Spectrum Licensing Frequency bands selected, but NTIA paperwork not yet submitted TRIO-CINEMA 11 UCB, 2/8/2010
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