Operational Procedures for AAReST Initialization and Testing
Explore the operational considerations and steps for AAReST initialization in narrow and wide operations. Detailed instructions cover deployment, commissioning, and calibration activities, ensuring successful mission execution. Stay informed on power management, sun pointing strategies, autonomous operations, and crucial system configurations for optimum performance.
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Presentation Transcript
ConOps Charles Sommer October 21st, 2019
ConOps Considerations 90 min polar orbit NORAD data retrieval 7 days after launch Always switching to sun pointing when battery reaches 55% (43Wh) of capacity (77Wh) Always taking night side when doing autonomous operations Battery and Camera heaters ON when on night side Transponder ON only when necessary and at full battery power Worst case power losses considered 5% from Kill Switch 20% from EPS switches 10%, 20% or 40% for Interface Boards switches 4/12/2025 2
Overview NARROW OPERATIONS Deformable Mirror 1 Narrow Test Deformable Mirror 2 Narrow Test AAReST Initialization Camera Deployment Rigid Mirror 1 Test Rigid Mirror 2 Test Deformable Mirror 1 Wide Test Deformable Mirror 2 Wide Test IIST MirrorSat Extended Mission Surrey MirrorSat Reconfiguration IIST MirrorSat Reconfiguration AAReST Decommission WIDE OPERATIONS 4/12/2025 3
AAReST Initialization NARROW OPERATIONS Deformable Mirror 1 Narrow Test Deformable Mirror 2 Narrow Test AAReST Initialization Camera Deployment Rigid Mirror 1 Test Rigid Mirror 2 Test Deformable Mirror 1 Wide Test Deformable Mirror 2 Wide Test IIST MirrorSat Extended Mission Surrey MirrorSat Reconfiguration IIST MirrorSat Reconfiguration AAReST Decommission WIDE OPERATIONS 4/12/2025 4
AAReST Initialization Step Actions ADCS Mode State Duration EPS + OBC + Radio ON (by default) NIGHT AUTO Autonomous Init. UHF/VHF Antennas Deployment 30 s max Beacon every 1 min None Tumbling ADCS ON + Health check 15 s NIGHT AUTO ADCS Initial Commissioning Angular rates determination 5 min Detumbling w/ torque rods Detumbling 4 orbits GPS ON + Signal Acquisition + TLE computation 5 min AUTO TLE & Sun Pointing Sun pointing with torque rods + battery charging Survival Sun Tracking 2 orbits NIGHT AND DAY Magnetometer calibration and survey 3 orbits NORAD data MANUAL ADCS Magnetometer and Reaction Wheel Commissioning Deploy Magnetometer if necessary None Tumbling 1 orbit Reaction wheels ramp-up test 1 orbit 4/12/2025 5
AAReST Initialization Energy drawn 78 76 74 72 70 68 66 64 62 60 1 6 11 16 17 18 19 21 31 331 2193122242222443304433045384455464554705601056550570905 Time elapsed (s) Remaining battery energy (Wh) 4/12/2025 6
Camera Deployment NARROW OPERATIONS Deformable Mirror 1 Narrow Test Deformable Mirror 2 Narrow Test AAReST Initialization Camera Deployment Rigid Mirror 1 Test Rigid Mirror 2 Test Deformable Mirror 1 Wide Test Deformable Mirror 2 Wide Test IIST MirrorSat Extended Mission Surrey MirrorSat Reconfiguration IIST MirrorSat Reconfiguration AAReST Decommission WIDE OPERATIONS 4/12/2025 7
Camera Deployment Step Actions ADCS Mode State Duration MANUAL Camera ON + Health check + Download first images Sun Tracking 1 orbit Camera Stage 1 Deployment Actuate Camera Burnwire + Take BIC picture Conf Change 10 s DAY Start Camera Accelerometer acquisition + BIC video Sun Tracking 5 s MANUAL Camera Stage 2 Deployment Actuate Camera Frangibolt None Tumbling 20 s Set new inertias + detumble + download video/data Detumbling 1 orbit MANUAL Fine Sun Sensor Commissioning Sun Tracking 1 orbit min. ADCS Fine Sun Sensor and Star Tracker Commissioning Star Tracker Commissioning Star Tracking 1 orbit min. 4/12/2025 8
Camera Deployment Energy drawn 77.1 77 76.9 76.8 76.7 76.6 76.5 76.4 Time elapsed (s) Remaining battery energy (Wh) 4/12/2025 9
Rigid Mirrors Tests NARROW OPERATIONS Deformable Mirror 1 Narrow Test Deformable Mirror 2 Narrow Test AAReST Initialization Camera Deployment Rigid Mirror 1 Test Rigid Mirror 2 Test Deformable Mirror 1 Wide Test Deformable Mirror 2 Wide Test IIST MirrorSat Extended Mission Surrey MirrorSat Reconfiguration IIST MirrorSat Reconfiguration AAReST Decommission WIDE OPERATIONS 4/12/2025 10
Rigid Mirrors Tests Step Actions ADCS Mode State Duration MANUAL RM ON + Health check + Release Mirror 1 min DAY Rigid Mirror Initialization Sun tracking Camera ON + Set picomotors ground values to MirrorBox 1 min Fine point towards calibration star 10 min NIGHT AUTO Fine pointing Take several SIC image every n seconds (star centered + boom jitter test) 30 min RM Test RW Desaturation + Sun tracking Desaturate RW + Download and assess images + recharge 1 orbit Fine point towards calibration star 10 min NIGHT AUTO Fine pointing Start blind search algorithm (if necessary) + save SC images 30 min RM Blind Search Algorithm (if necessary) RW Desaturation + Sun tracking Desaturate RW + Download and assess images + recharge 1 orbit Fine point towards calibration star 10 min NIGHT AUTO Fine pointing Start optical alignment algorithm + save SC images 30 min RM Optical Alignment RW Desaturation + Sun tracking Desaturate RW + Download and assess images + recharge 1 orbit 4/12/2025 11
Rigid Mirrors Tests Energy drawn 80 75 70 65 60 55 50 34 44 46 51 56 8943 2 4 843 2756 8156 8216 8336 8341 8343 656 661 841 845 16503 19337 10743 10748 10928 10930 10932 11043 16443 16743 16748 16750 17350 19150 19155 19335 19339 20050 25450 25510 25750 Time elapsed (s) Remaining battery energy (Wh) 4/12/2025 12
Deformable Mirrors Tests NARROW OPERATIONS Deformable Mirror 1 Narrow Test Deformable Mirror 2 Narrow Test AAReST Initialization Camera Deployment Rigid Mirror 1 Test Rigid Mirror 2 Test Deformable Mirror 1 Wide Test Deformable Mirror 2 Wide Test IIST MirrorSat Extended Mission Surrey MirrorSat Reconfiguration IIST MirrorSat Reconfiguration AAReST Decommission WIDE OPERATIONS 4/12/2025 13
Deformable Mirrors Tests Step Actions ADCS Mode State Duration MirrorSat Initialization Power up MS + Healthcheck + downlink results Sun tracking 1 orbit Same operations as RM Fine point towards calibration star 10 min NIGHT AUTO Fine Pointing Start influence function computation algorithm + save SIC images + influence function results Several orbits DM Influence Function Computation Desaturate RW + Download and assess results + Recharge RW Desaturation 5 orbits Fine point towards calibration star 10 min NIGHT AUTO Fine Pointing Several orbits DM Wavefront Error Minimization Start wavefront error minimization algorithm Desaturate RW + Download and assess results + Recharge RW Desaturation 5 orbits 4/12/2025 14
Deformable Mirrors Tests Energy Drawn 80 75 70 65 60 55 50 45 40 Time elapsed (s) 4/12/2025 15 Remaining battery energy (Wh)
MirrorSats Reconfiguration NARROW OPERATIONS Deformable Mirror 1 Narrow Test Deformable Mirror 2 Narrow Test AAReST Initialization Camera Deployment Rigid Mirror 1 Test Rigid Mirror 2 Test Deformable Mirror 1 Wide Test Deformable Mirror 2 Wide Test IIST MirrorSat Extended Mission Surrey MirrorSat Reconfiguration IIST MirrorSat Reconfiguration AAReST Decommission WIDE OPERATIONS 4/12/2025 16
MirrorSats Reconfiguration Step Actions ADCS Mode State Duration Camera, PICs, WiFi ON + Start BIC video + Actuate Frangibolt None 20 s MS Frangibolt Actuation Detumble + download video + Verify MS still held by permanent mags Detumble + Sun Tracking 1 orbit Start BIC video + Actuate Burnwire 2 s Actuate EMS to gently push MirrorSat + Test LED pattern None 10 s MS Free Fly Test Pull MirrorSat back with EMS 10 s Detumble + Sun Tracking MANUAL Detumble + download video and results 1 orbit DAY Start BIC video + Actuate EMS to push MirrorSat None 2 s Update ADCS to L shaped inertias with 1 MS attached 5 s Use LEDs and EMS to let MS free fly X mm away Conf Change 10 s MS Reconfiguration Rotate CoreSat 45 deg 10 s Pull back, dock MS back with EMS + update ADCS inertias None 10 s Detumble + Sun Tracking Detumble + download video and results 1 orbit
IIST MirrorSat Extended Mission NARROW OPERATIONS Deformable Mirror 1 Narrow Test Deformable Mirror 2 Narrow Test AAReST Initialization Camera Deployment Rigid Mirror 1 Test Rigid Mirror 2 Test Deformable Mirror 1 Wide Test Deformable Mirror 2 Wide Test IIST MirrorSat Extended Mission Surrey MirrorSat Reconfiguration IIST MirrorSat Reconfiguration AAReST Decommission WIDE OPERATIONS 4/12/2025 18
IIST MirrorSat Extended Mission Step Actions ADCS Mode State Duration Actuate EMS to gently push away IIST MS None 20 s IIST MirrorSat Separation MANUAL Update ADCS to I shaped inertias with 1 MS missing ? DAY Conf Change Keep IIST MS in view of patch antenna (max 1km?) ? IIST MirrorSat Experiment Actuate IIST MS propulsion system at a given distance (?) ?
MirrorSats Decommission NARROW OPERATIONS Deformable Mirror 1 Narrow Test Deformable Mirror 2 Narrow Test AAReST Initialization Camera Deployment Rigid Mirror 1 Test Rigid Mirror 2 Test Deformable Mirror 1 Wide Test Deformable Mirror 2 Wide Test IIST MirrorSat Extended Mission Surrey MirrorSat Reconfiguration IIST MirrorSat Reconfiguration AAReST Decommission WIDE OPERATIONS 4/12/2025 20
AAReST Decommission Send a command to switch OFF: OBC Radio Controller Radio 12V line would still be powered (unswitchable) Currently, no firecode like command to switch off everything
