ParkinsonSAT serb1

Information about ParkinsonSAT serb1

Published on January 17, 2008

Author: Dario

Source: authorstream.com

Content

Slide1:  Bob Bruninga US Naval Academy Satellite Lab 410-293-6417 [email protected] Sponsor: ONR , Aerospace Corp UNCLASS Navy Space Experiments Review Board (SERB) July 2006 USNA-0601 ParkinsonSAT Remote Data Relay (Psat) GROUND STATION ODTML Psat Psat (USNA-0601) Experiment Concept:  Description: Educational Spacecraft - ODTML UHF transponder MIDN Radiation Sensor University VHF Remote Data Experiment Transponder Remote Data Relay Global Internet Gateways Open System Tracking Draw from 30,000 users Scaleability and Constellation 9 dB link advantage to UHF Objective: Remote Data Relay Transponder for low cost Sensors, Vehicles and Stations Psat (USNA-0601) Experiment Concept Previous Priority: New Start 2006 Can fulfill some of SCIENCE objectives Complementary Experiments: Transparent protocol. Can support any AX.25 device Off the shelf $250 systems exist. 30,000 users Compatible with PCSATs, ANDE, RAFT, ARISS, ECHO, etc P-SAT (USNA-0601) Intro and Background:  P-SAT (USNA-0601) Intro and Background Psat is to be a low cost educational transponder supporting not only ODTML, but also a University Remote Experimental Data Relay system. Background The University channel can potentially draw from over 30,000 experimenters for easy assessment of loading and scaling issues. Not only the sensors and users exist, but the global Internet collection and distribution system also exists from PCSAT1 & 2. Psat (USNA-0601) Technology & Development:  Experiment Funding: Psat (USNA-0601) Technology & Development Major Instrument or Equipment: ODTML UHF Data Transponder Psat University VHF/UHF Data Transponder PCSAT-1 style Open Educational Force Tracking MIDN Radiation Sensor Instrument or Equipment Operation: Dual Redundant C&DH and quad payload receivers TDMA channel sharing 1200/9600 baud Aloha, Slotted Aloha, and CSMA Additional Voice Relay and file store/forward Sun pointing for lower cost solar power system Low cost attitude control +/- 40 degree requirement Hardware Status: All Technologies are mature and off the shelf All technologies have space heritage (PCSAT) CDR: Spring 2007 Flight Ready: Spring 2008 ! Psat (USNA-0601) Military Relevance:  Psat (USNA-0601) Military Relevance Military Needs: ODTML Force Multiplier. Easy testing of Large Scaleability Data Exfiltration and service to low power/low-priority users Education and experience for Future Naval Officers & Space Cadre DOD Schools: Service Academies (4) Graduate Institutions (3) ROTC Units (550 Schools) DOD Comms Cadre: Civil Air Patrol (1800 units) Military Affiliate Radio Stations (8000) US Coast Guard Auxiliaries (33,000) Documentation: NDAA (P.L. 104-201) Directs …Ocean Research and Sciences CNA study (June 04) identifies data exfiltration requirement USSpaceCom Long Range Plan, p77-79 - education Ocean Buoys w/ RF Terminals GROUND STATION Psat (USNA-0601) Flight Requirements:  Experiment / Flight Data: Apogee: 500 to 1500 km Perigee: 500 to 1500 km Inclination: 20 to 98 deg (lower, if higher) Physical Data: .02 m3, 20 kg, nominal 20 W Shuttle/ISS Required: [No]: Acceptable: [No] Experiment Retrieval Required: [No] Repetitive/incremental step flights: [No] Requested STP Services Launch Services Launch Integration Psat (USNA-0601) Flight Requirements Need for Spaceflight Remote Data Relay requires Communications orbit. Data Sources, Data Users are distributed worldwide Force Multiplier for ODTML constellation ! Psat (USNA-0601) Technology Transition/Data Application Plan:  Transition Plan All data from all experiments available live via Internet feeds from global ground stations All AX.25 Data and formats handled transparently by Satellite and Global Infrastructure New-User, New Experiment, New Data transparently accomodated instantly. Global infrastructure has existing WEB telemetry displays built-in. Psat (USNA-0601) Technology Transition/Data Application Plan ! Slide8:  Sensor Buoy Baseline PCSAT2 User Plot 18 Apr 06 PCSAT validates our links Vandegriff Sensor Buoy Baseline:  Sensor Buoy Baseline Psat USNA-0601 Mission Scale – Buoy Demographics:  Mission Scale – Buoy Demographics Theoretical capacity: 2880 Expected capacity: 720 144/5% 144/20% Lovick Psat USNA-0601 Slide11:  Mission Scale - Channel Capacity Time Division Multiple Access (TDMA) Pure ALOHA 18% channel capacity CSMA ALOHA 36% channel capacity (not via sat) Slotted ALOHA 36% (uses GPS timing) Lovick Psat USNA-0601 Slide12:  Psat USNA-0601 Slide13:  ParkinsonSAT Full System Design Sun Pointing Vandegriff Psat USNA-0601 Slide14:  ParkinsonSAT Sun Pointing Design Full capacity mission transponders ODTML Transponder MIDN Payload ADCS advantage Vandegriff Psat USNA-0601 Slide15:  ParkinsonSAT Internal Stack Full capacity mission transponders ODTML Transponder MIDN Payload ADCS advantage Vandegriff Psat USNA-0601 Slide16:  Sun Pointing Attitude Control System Pointing requirements are relaxed +/- 40 deg High precision vector math not required Paquette ODTML off (4.5 W) ODTML on (18W) Psat USNA-0601 Slide17:  Torque Lab Experiment 200 turns #30 42 Ohms, 200 mA 1.3 Amp * M2 1.4 kg Results in 5 deg / sec Suggests for ParkinsonSAT 200 turns #30 4 Amp * M2 14 kg Results in 1.5 deg / sec Paquette Using 10% dutycycle pulsing still gives 10 dB margin Magnetic Torque Coils Psat USNA-0601 Slide18:  Sensor Buoy Baseline Piggrem See Buoy Location and Telemetry at http://www.ew.unsa.edu/~bruninga/buoy.html Psat USNA-0601 Slide19:  Buoy Antenna Design 70% Paquette Psat USNA-0601 Slide20:  Prototype Buoy Data Psat USNA-0601 Slide21:  Questions? Psat USNA-0601 Slide22:  ParkinsonSAT Internal Stack Full capacity mission transponders ODTML Transponder MIDN Payload ADCS advantage Vandegriff Psat USNA-0601

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