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EOSS186 Flight Dynamics Russ Chadwick, KB0TVJ

This documentation provides a comprehensive analysis of the flight dynamics of EOSS186, focusing on the real-time data and logged measurements from KC0YA-11 and KC0UUO-11. Flight details and altitude changes, including ascent rates at both 1-second and 30-second intervals, are accessible at findU.com and eoss.org. Key findings reveal that the GPS drop-out observed during KC0YA-11 is unlikely to have resulted from flight dynamics. Following the burst, strong lateral motion was detected, persisting during descent without affecting GPS performance in either payload.

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EOSS186 Flight Dynamics Russ Chadwick, KB0TVJ

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  1. EOSS186 Flight DynamicsRuss Chadwick, KB0TVJ Real-time data from findU.com KC0YA-11 measurements @ 30 sec rate KC0UUO-11 measurements @ 1 sec rate Complete flight details at http://www.eoss.org/ansrecap/ar_200/recap185_186.htm

  2. Altitude and ascent rate from real-time data at findU.com

  3. Altitude and ascent rate from the KC0YA-11 log data available after flight

  4. 3D movement from KC0UUO-11 log for “t127” period in ascent rate list

  5. 3D movement from KC0UUO-11 log for entire flight

  6. 3D movement from KC0UUO-11 log for two minute period around burst

  7. 3D movement from KC0UUO-11 log for 20 sec period at burst

  8. Conclusions from one second data • It is not apparent that flight dynamics caused the 127 second GPS drop-out on KC0YA-11 • Burst resulted in strong lateral motion (post-burst chaos?) persisting during the descent • Lateral motion during descent did not impact GPS operation in either KC0YA-11 or KC0UUO-11 • Lateral motion started several seconds after burst and was likely not caused by burst directly

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