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Team: 1/C Campbell, 1/C Lewis, 1/C Londoño, 1/C Smythe, 1/C Mayer, 1/C Dedinger

Team: 1/C Campbell, 1/C Lewis, 1/C Londoño, 1/C Smythe, 1/C Mayer, 1/C Dedinger. ParkinsonSAT - USNA. PRIMARY MISSION Satellite for data exfoliation ODTML for DOD ocean buoys Remote sensor data in the Amateur Satellite Service A comms transponder in continuation of PCSat Mission

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Team: 1/C Campbell, 1/C Lewis, 1/C Londoño, 1/C Smythe, 1/C Mayer, 1/C Dedinger

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  1. Team: 1/C Campbell, 1/C Lewis, 1/C Londoño, 1/C Smythe, 1/C Mayer, 1/C Dedinger

  2. ParkinsonSAT - USNA • PRIMARY MISSION • Satellite for data exfoliation • ODTML for DOD ocean buoys • Remote sensor data in the Amateur Satellite Service • A comms transponder in continuation of PCSat Mission • Educational transponder support for other schools and universities • SECONDARY MISSION • Support the MiDN experiment • Measure radiation levels in orbit using dosimeter • Support a UHF RFI mitigation receiver • Locate and identify interference to Navy UHF satellites • Support SPID • Small Particle Impact Detector (former LADD-C project)

  3. ParkinsonSAT - USNA

  4. ParkinsonSAT - USNA

  5. ParkinsonSAT - USNA UHF RFI Mitigation Experiment

  6. ParkinsonSAT – Configuration Management/Documentation • P-SAT Design Paper- Campbell • Requirements and Verification Document- Londoño • P-SATFrequency Request Form- Londoño • Specification Document- Londoño • Interface Control Documents ODTML- Okun SPID - Campbell UHF-RFI-Lindsay

  7. ParkinsonSAT – Drawing List • Summary of Drawings: • Assembly(4) • Side-Panel (12) • Bulkhead (8) • Antenna (2) • EPS (5) • Comms (6) • MIDN (3) • ODTML (3) • ADCS (3) • RFI (3) • Sep (2) • Propulsion (2) • Transponder (2)

  8. ParkinsonSAT - USNA • Communications Package • Dual Redundant System – System A and B • Desired - a structure to contain Receivers (2), Transmitter, TNC, and system control board. • Structure is self-contained and capable of being used on missions other than ParkinsonSat (MidSTAR-2) • Progress: Developed initial concept for box structure

  9. ParkinsonSAT - USNA • CommsTransponder Box -Initial Concept

  10. ParkinsonSAT - USNA • Side 1 • Receivers (2) • Transmitter • Interference/Control Board

  11. ParkinsonSAT - USNA • Side 2 • TNC • Mechanism for Securing TNC • Interference connectors

  12. ParkinsonSAT - USNA Thermal Control: • Heat Sink transfer to frame • Thermal compound to satellite structure • Black anodized

  13. ParkinsonSAT - USNA Still to do: • Ideas model • Connectors • Wiring harness • Vibrations Test • Preparation for Space: • Staking components • Conformal coating

  14. ParkinsonSAT–SunPointing Design Top Panel Cost=$9000 Sides Panel Cost=$200

  15. ParkinsonSAT-Sun Pointing Attitude Control System • Pointing requirements are relaxed +/- 40 deg • High precision vector math not required ODTML on (18W) ODTML off (4.5 W) Paquette

  16. ParkinsonSAT - USNA EMCOR University Cells $500/watt PC Sat Panel$20/watt

  17. ParkinsonSAT - USNA Separation Device

  18. ParkinsonSAT - Structure Internal Bulkhead Payload Bay NEA Location Battery Cells Solar Panel

  19. ParkinsonSAT – Satellite Health Major System Health Telemetry Beacons

  20. ParkinsonSAT – Telemetry Schematic

  21. ParkinsonSAT – EPS Block Diagram

  22. ParkinsonSAT–Load Requirements

  23. ParkinsonSAT – Charging Current

  24. ParkinsonSAT - USNA BUDGET • Solar Panels $8k for Emcor cells $2k for PCsat style cells • Machining $5k • Anodizing and Coatings $2k • Flight Hardware $5k • Proto/Test/Spares HW $10k • Vib/TVAC at NRL $5k • Travel (Prof. Bruninga) $3k • Travel (Midshipmen) $4k • Miscellaneous $2k • Alumni Tax $3k ________________________________________ Total $50k

  25. ParkinsonSAT - USNA Parts Procurement • Kyocera Mini Solar Panels Purchased 30 of them, $24 each -> $720 • 3-Axis Magnetometer Purchased 8 of them, $55 a piece ->$440 • High Speed Transmitters and Receivers Purchased 4 Xmitters, 6 Receivers, $220 a piece -> $2200

  26. ParkinsonSAT - USNA Solar Panel Acceptance Testing Over 91% of the solar panels tested were within 3% of the voltage of the reference panel. 100% were within 5%.

  27. ParkinsonSAT-Attitude Determination and Control • CPU Controlled • Uses solar panels and magnetometer to determine attitude • Commands momentum wheels and magnetic torquing coils to maintain sun pointing attitude

  28. ParkinsonSAT- 3-Axis Magnetometer • 500uA @ 3.3V DC • Field measurement range +/-1100uT • Resolution as low as 0.015uT

  29. ParkinsonSAT - USNA • Testing indicates sensor has an accuracy of ± 5% for roll and pitch

  30. ParkinsonSAT - Rabbit Core 3000 Navigation and Control Board

  31. ParkinsonSAT - USNA

  32. ParkinsonSAT - USNA • 29.4Mhz Processor • Programmed with Dynamic C • 10 Channels 5V A2D • 4 PWM Channels • 5V-9V input up to 400mA • 4 External Interrupts

  33. ParkinsonSAT - USNA • CPU will also be used for housekeeping and telemetry and control • Log experiment data • Parse telemetry into packets • Command systems on or off • Monitor health of satellite systems and experiments

  34. ParkinsonSAT – ADCS Model • Momentum Wheel • 3-axis Magnetometer • CPU Control System • Telemetry System • Command and Control Radio

  35. ParkinsonSAT–RickSAT ADCS • Requirements: • Sun Exposure • Minimum Torque, (long string needed) • Minimum Disturbances • Out of Reach • Easy Access

  36. ParkinsonSAT-Apparatus Safety Test • P-SATWeight- 5.9kg • String=rated at a 13.5 kg • Double String= factor of 4 safety • A-Frame Support- • testedto 38 kg= factor of 6 safety

  37. ParkinsonSAT –ADCS String test • Simulation Quality • Typical Disturbance Torques • Gravity Gradient-2* • Solar Radiation- 6* • Aerodynamic- 3* • Magnetic- 1* for a 2 Amp-m magnetic moment • Measuring String Torsion Constant • k=1.1* kg-m /sec • T=k* • Disturbance angle ( ) where string Torque is less than 1* is 90 deg • String impact is minimal for Sun tracking within +/-90 degrees. Rickover

  38. ParkinsonSAT - SPID Small Particle Impact Detector

  39. ParkinsonSAT - SPID Deployment Sequence

  40. PSAT- S.C.I.E.N.C.E ISS Space Communications International Educational Network Classroom Experience

  41. PSAT- S.C.I.E.N.C.E ISS

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