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University at Buffalo GLADOS SHOT II Balloon Payload Presentation June 29, 2012

University at Buffalo GLADOS SHOT II Balloon Payload Presentation June 29, 2012 Andrew Dianetti, Alex Wende, Bryant Carlson, Joe Flannery. Mission Overview. Test spectrometer data compression algorithm Transmit compressed data to ground

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University at Buffalo GLADOS SHOT II Balloon Payload Presentation June 29, 2012

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  1. University at Buffalo GLADOS SHOT II Balloon Payload Presentation June 29, 2012 Andrew Dianetti, Alex Wende, Bryant Carlson, Joe Flannery

  2. Mission Overview • Test spectrometer data compression algorithm • Transmit compressed data to ground • Test ability to transmit and receive compressed spectrometer data • Log data on payload and compare received data to actual transmitted data • Test in sample satellite conops routine with health beacon

  3. SHOT II/UN-7 Connection • GLADOS Mission Statement: Utilize multi-band photometric data of glinting space objects to identify their type, surface materials, and orientation. • Spectrometer measures photometric data • Data must be compressed to downlink • Successful reception of spectrometer data critical to mission objectives

  4. SHOT II Design - Hardware Arduino Mega GPS Flash memory Temp sensor TNC Radio Heater control MOSFET Heater Antenna Panda Board Voltage Regulator Inhibit • BOM: • Payload housing – 3/16” foam core with ¾” polystyrene • Flight line attachment – ¼” ID PFTE tubing • “Flight computer” – Arduino Mega • Spectrometer Data Processor – PandaBoard • Radio – Friendcom FC-401/D with OpenTracker • GPS – Byonics GPS4 • Heaters – (5) 3.9 ohm 5W resistors • Temperature sensors • (2) Mini Video Cameras Inhibit Spectrometer Data (SD) Heater Battery Battery Cameras

  5. SHOT II Design – Software Release inhibit Start Health Beacon Temperature regulation Transmit health data RS-232 Link Wait for PandaBoard boot Load program “Take” spectrometer data (from SD card) Compress data RS-232 Link Listen for data Output compressed data Transmit data to ground Log data to flash N Ascending? RS-232 Link Y Wait for signal N Health OK? Command shutdown Query data? Y Y Query more data N Shut Down

  6. SHOT II Design: Compliance • Weight: 1393 g (<1500 g) • Flight string attachment: ¼” PFTE w./ shear pin • RF: 145.600 MHz Half-Duplex, EIRP 0.32 W • Labeled with contact info, flag

  7. SHOT II Test Details • Functional Test • 3 hours run time • Battery close to full charge at conclusion (10.9 V) • Successful radio link, but limited range (~2 mi) • Expect increase with better line-of-sight • Thermal test • Initial test drained battery in ~2 hr • Added separate battery pack for heaters • 3 hrs with Temp above 1°C

  8. SHOT II Test Details • Whip Test • No issues of note • Drop Test (~18 feet) • Slight damage to corner of test article, no impact to internal mass objects • Stair Pitch Test (15 concrete steps) • Slight scratches and scrapes, no impact to internal objects

  9. Expected Results • Expect health data for entire flight • Flight computer to command PandaBoard based on GPS • Transmitted data to be logged to SD card • Expect data error to increase with distance • How does varying loss rates during downlink affect packets recovered? • Flight conditions are better model than ground test

  10. Demonstrations • Payload shown • Demonstrate activation of payload

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