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Operations

Operations. Operations Agenda. Ground Systems Development Ground System Diagram Mission Operations Center Ground Stations RF Licencing Security Software Procedures Verification and Training GSFC Support Launch and Early Orbit Contacts Ground Based Observations.

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Operations

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  1. Operations

  2. Operations Agenda • Ground Systems Development • Ground System Diagram • Mission Operations Center • Ground Stations • RF Licencing • Security • Software • Procedures • Verification and Training • GSFC Support • Launch and Early Orbit • Contacts • Ground Based Observations

  3. Ground System Diagram • Ground System Elements • Ground Stations • Ground Network • Space Network • Mission Operations Center • Science Operations Center • Flight Dynamics Center • Including • Mission Design • Orbit & Attitude Determination • Maneuver Planning • Limit Detection and Notification • Network Security

  4. Mission Operations Center BGS Antenna, Equipment Racks and FOT Workstations at the Mission Operations Center

  5. MOC Expansion

  6. Ground Stations • Mission Supported by 5 Ground Stations • Ground Stations: BGS, WGS, MILA, AGO, HBK • GN, SN and FDF Support Documented in PSLA • All Stations Have Successfully Flowed Data with MOC

  7. NTIA License • NTIA License Status • Identical Frequency Pairs for All Probes Assigned by GSFC Spectrum Management Office • Telemetry: 2282.5 MHz • Command: 221 / 240 × 2282.5 = 2101.802083 MHz • DoD Approved Frequency Assignment • Stage 4 License Approved • Stage 2 Application Was Submitted to NTIA in June 2004 • Reviewed by Space Frequency Coordination Group (SFCG) at Meeting in November 2004 • Stage 2 License Was Approved in December 2004 • Stage 4 License Was Approved in February 2006

  8. IT Security • Security Measures • Physical Security • Facilities Locked and Protected by Alarm System • Access Controlled by University of California Police Department • Network Security • Tight Access Rules on Firewalls • Regular Password Changes • Document Access • Critical Documents and Databases Kept Confidential • Personnel • Screening and Background Checks Complete • Establishment and Enforcement of Rules of Behavior

  9. Software Status

  10. Software Status MOC Software Complete Currently Under Pre-Launch Software Freeze

  11. Procedures • Procedure & Display Status • All 19 Flight Ops Procedures Ready • All 9 Contingency Ops Procedures Ready • All 178 Computer Procs Ready • All Computer Displays Ready

  12. Verification & Training • Verification and Training Program • Operations Identified 238 Verification and Training Exercises • Currently 90% Are Complete. Expecting 97% by Jan 15th • All Launch Critical Exercises Completed This Week • Fuel Record Keeping • Closed Loop Maneuver Sims • Launch Simulation in PCA Configuration Successful at JPL • Launch Simulation is Planned Two More Times (ASO & PAD) • Continuing Pass Simulations with Combined UCB/Swales Team • Mission Dress Rehearsal at L-2 with MOC and GSFC/FDF

  13. GSFC Support • GSFC Support • FDAB Support • MSASS Upgrade Including Kalman Filter and Usage Support • GTDS Software Upgrade and Usage Support • GMAN Support and Validation of Maneuver Scenarios • CALIBATT Support for Attitude Maneuver Calibration • FDF Support • Assignment of BGS Transmit and Receiver Tracker IDs • Verification of BGS Two-way Doppler Tracking • Pre-launch Data Flows • Orbit Determination Pre-Launch SImulations • Orbit Determination Post-Launch Support • SCP Support • Network Operations Support • Ground Network Support • Space Network Support (TDRSS)

  14. LEO Operations • LEO Operations • State Vector Delivered to UCB via email @ SECO-2 (65min) • Monitoring of Probe Separation via TDRSS • Top Probe Will Be Commanded to Transmit at T+70 mins • Separation will occur at T+73 minutes • All Probes Will Be Recording Engineering Data • Separation Recorded by Each Probe Individually • Engineering Data Dumped in Later Passes • Probes Are Released at Good Sun Angle, Power Positive • 43 degrees Side to Sun Probe A Released First Probes B−E Released Simultaneously 3 s Later All Probes Independent of Each Other

  15. LEO Acquistion • LEO Acquisition • Multiple Ground Assets Have Good View Following Launch • Probe Attitude Around 1:30 MET is Poor for Telemetry • Probes Contacted at 4Kbps for 5 Minutes each from 1:20 to 1:40

  16. LEO Early Orbit • Early Orbit Activities • First Real Round-robin Contacts • Starting about T+2hr, Each Probe Will Be Contacted for 10 Mins • Rest Period between Probe Contacts of 5 Mins • Expected Battery SOC to Remain > 87% • Initial Orbit and Attitude Determination • Record and Process Two-way Doppler Data • Perform Attitude Determination in Real-time • Both UCB and GSFC FDF Function in Parallel • Round-Robin Checkout of Key Systems on Each Probe • Reaction Control System Readiness • Attitude Sensors Functionality • Perform Attitude Maneuver to Ecliptic Normal • If Power Negative, Will Maneuver on First Orbit. • Improves Power and Communications Coverage • Systematic Instrument Power-up and Check-out • Leads to Decision of Probe Orbit Placement in Appx 26 Days

  17. LEO Orbit Placement • Orbit Placement Decision • Decision Based on Probe Bus and Instrument Checkout • Probe Bus RCS, ACS and Power System • Unable to Check Probe Thermal System Entirely • Instrument Check-out of FGM, SCM, SST and ESA • Unable to Check EFI with AXB & SPB Booms Stowed • PI Team Members Involved in Probe Placement Decision • PI, PM, MSE, MOM, Swales Probe Bus Systems Lead, Instrument Scientists, GSFC Program Manager and GSFC Project Scientist • Assignment of Constellation IDs • According to Probe Placement Decision

  18. LEO Probe Identification • LEO Probe Identification • Provides Unique Relationship between Various Probe Identifiers • Extensively Tested during Mission Integration * Assigned after Launch ** Assigned after Probe Placement Decision

  19. Contacts - Typical Entire Ground Station View Periods at Nominal Low Data Rate of 4.096 kbps

  20. Contacts - Total • Ground Station Contact Summary • Number of Passes Based on Detailed 2-Year Mission Design • BGS 11-m (Primary) • WGS 11-m, MILA 9-m, AGO 9-m and HBK 10-m (Secondary) • Passes Included to Support Routine and Special Operations • Daily BGS Contacts with All Probes for State-of-health Monitoring • Maneuver Support, Instrument Commissioning, Doppler Tracking

  21. Contacts - TDRSS • TDRSS Contact Summary • Launch Support • Monitoring of Probe A Separation • Maneuver Support Near Perigee for All Probes • Apogee Change for Mission Orbit Placement • Initiation of Reentry • Contingency Support for All Probes • Only Few TDRSS Contingency Support Hours Required

  22. Geographic Longitude 195° Geographic North Pole Geographic Longitude 324° Geomagnetic NorthPole Courtesy H.Frey, UCB Ground Based Observatories • Ground Based Observatories • UCB has Delivered All 20 GBO (GMAG and ASI) units • 19 Have Been Installed, 1 Needs Repair • Automatic Data Collection and Archiving in Progress • Remote Commanding and Diagnostics Working • Expect to be Fully Functional at Winter 2008

  23. Ground Observatory Status /1: Supply Down /2: Radar RF Noise

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