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X-ray Missions Delta: AXSIO Redux

X-ray Missions Delta: AXSIO Redux. Mission Operations Deborah Knapp 30 April – 1 May 2012. Topics. Mission Operations Summary Ground System Functional Architecture MOC Architecture (typical) Key Customer Requirements Mission Overview Mission Timeline Technology Assessment

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X-ray Missions Delta: AXSIO Redux

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  1. X-ray Missions Delta:AXSIO Redux Mission Operations Deborah Knapp 30 April – 1 May 2012

  2. Topics • Mission Operations Summary • Ground System Functional Architecture • MOC Architecture (typical) • Key Customer Requirements • Mission Overview • Mission Timeline • Technology Assessment • Cost Basis of Estimate • Mission Operations Periods • Staffing Periods Used for Costing • Cost Summary • Risk/Issues/Concerns • Additional Trades • Acronyms

  3. Mission Operations Summary • Mission Operation Control (MOC): • Provides “standard” set of functional components to support Mission Operations (e.g., S/C commanding, mission planning/scheduling, and RT TLM monitoring, HK trending and analysis). • Provides level zero processing (LZP) • Level 0 Products: Time-ordered, quality annotated data sets produced for each contact • Level 0 products transferred to Science Operations Center (SOC) • Provides voice communications between the MOC & SOC for coordination • Space-Ground contact profile • DSN (34 meter antenna) • TDRSS for launch & early mission operations • Spacecraft data rates: • DSN • S-band via HGA • 2 kbps command • 8 kbps housekeeping telemetry • S-band via Omni • 1 kbps command • 2 kbps housekeeping telemetry • Ka-band • 20 Mbps science telemetry • TDRSS • 1 kbps command • 1 kbps telemetry • Data Latency Requirements: • 72 hour required, 24 hour goal • Data Recovery: • Assume 98% recovery requirement (end-to-end) • Orbit Determination via DSN ranging • SOC is costed by the customer • FDF is costed by FDF engineer

  4. Ground System Functional Architecture Legend: CMD = Commanding HK = House-Keeping data TLM = Telemetry data Launch & early mission TLM: 1 kbps CMD: 1 kbps Ka-band TLM: 20 Mbps S-band TLM: 8 kbps CMD: 2 kbps Science Ops Center Data Processing and Analysis Experiment planning Payload monitoring Costed by customer DSN 34 meter sites AXSIO Mission Ops Center Mission planning & scheduling Orbit determination/control Network & contact scheduling Commanding S/C monitor/control RT health/safety processing Trending/Analysis Instrument data handling Level 0 product processing Level 0 Data Archive FDF is costed by FDF engineer Voice TLM, HK WSC TLM, HK CMD TLM, HK CMD Basis of cost study is in red

  5. MOC Architecture (typical) * Level Zero Processing Attitude Control Flight Dynamics Telemetry & Command Data Front-end System Ground Stations * SOC LAN/Message Bus Mission File Server /Archive Anomaly Notification Data Analysis & Trending Event Display/ Logging Mission Planning & Scheduling Email & Internet Access *Not costed by Mission Operations Internet

  6. Key Customer Requirements • Launch date: 6/15/2022 • Mission Life: 3 yrs required, 5 years goal • Begins after arrival at L2 • SE L2 orbit 2 with no eclipses • Class B mission

  7. Mission Overview • X-ray telescope with 2 instruments, the X-Ray Microcalorimeter Spectrometer (XMS) and the X-Ray Grating Spectrometer (XGS) • X-ray spectroscopy of selected targets

  8. Mission Overview Launch 6/15/2022 Calibrate w/ Celestial Targets then start Science Ops After outgassing: Jettison / Open Flight Mirror Assembly Covers, turn Cryo on Open Instrument Covers and Gate Valves Transfer Trajectory Insertion (TTI) at L + 25 to 120 minutes LV Separation: TTI + 5 minutes Commence Observatory Checkout EOM Disposal: ELV Dispersion Corrections at TTI + 24 hrs Commence Instrument Aliveness Checks Instrument internal background measurements First Mid-Course Correction: TTI + 16 days Second Mid-Course Correction: TTI + 60 days At L2, continue with Science Ops L2 Orbit Insertion (L2OI) TTI + 100 days

  9. Mission Timeline Launch 6/15/2022 L2 Insertion Disposal Prime Mission 36 - 60 months Mission Closeout Cruise 100 days 1 month Checkout (8x5 ops) Nominal Operations (4x5 ops)

  10. Technology Assessment • Use COTS/GOTS-based MOC as basis for MOC implementation • Software packages are available to satisfy MOC required functionality: • ITOS, ASIST, EPOCH 2000, ALTAIR are commercially available today and provide required functionality for Spacecraft Command/Control and Level Zero (LZ) Processing. • Low data volume so no special/new technology required • Most required technologies have been at least demonstrated; many in currently operational systems. • Technology Complexity: Low • Technology Readiness Level: 9

  11. Cost Basis of Estimate • Goddard estimated FY2012 Cost Rates used ((FY2010*.024)*.026) • More detail available in the Excel Spreadsheets • Development Cost Assumptions • For MOC planning/scheduling, command load generation/validation and data processing support • Provides three physical h/w strings (primary & backup) • Most MOC functions are provided by COTS and/or GOTS software • Some new development for Mission unique requirements. • Operations Staffing Cost Assumptions • 4x5 operations • Communications Link Cost Assumptions • DSN • TDRSS for launch & early mission • Level 0 Processing • Data available near real time • NOTE: FDF costs are provided by the FDF engineer, SOC costs are provided by the customer

  12. Period 4 (2 months) Period 5 (38 months) Mission Operations Periods Preliminary Design Final Design Mission Cleanup Bus & P/L Fab/Assy/Test Payload Primary Ops Bus & P/L I&T System Definition Prep for Launch Launch & Checkout Phase B Start 12/14/14 CDR 6/14/18 PDR 12/13/16 Project Start 12/13/12 Phase C Design Phase B Definition Phase A Preliminary Analysis Period 1 (42 months) Mission Definition 18 months 24 months 24 months Period 3 (10 months) Period 2 (37 months) Period 6 (3 months) Launch 6/15/22 Disposal 9/13/2025 Phase D-1 Subsystem Development and Spacecraft Integration and Test Funded Schedule Reserve 8 mo. Phase E/F Operations Phase D-2 Launch & Checkout Period 5-1 (1 month) 21 mo 16 mo 3 mo 47 months 1 month 41 months

  13. Staffing Periods Used for Costing

  14. Cost Summary

  15. Cost Summary For Comparison

  16. Risk/Issues/Concerns • Risks • none • Issues • none • Concerns • none

  17. Additional Trades • Benefits of co-locating MOC & SOC • Spreads facility costs among missions • Shared communication lines • Staffing reduced to 3x5 (or even less) during non-critical operations • Reduce MOC hardware strings from 3 to 2

  18. Acronyms CDR Critical Design Review CMD Command COTS Commercial Orbital Transportation Services or Commercial Off the Shelf DSN Deep Space Network EOM End of Mission ES L2 Earth – Sun Lagrange Point FT Functional Test GOTS Government Off the Shelf HGA High Gain Antenna HK Housekeeping Kbps Kilo-bits per second LV Launch Vehicle LZP Level Zero Processing Mbps Mega-bits per second MOC Mission Operations Center RT Real Time SA Solar Array S/C Spacecraft SOC Science Operations Center TDRSS Tracking & Data Relay Satellite System TLM Telemetry ITOS, ASIST, EPOCH 2000, ALTAIR are commercially available software packages for controlling spacecraft & performing level zero processing

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