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Geosat Follow On: Recovery from Attitude Error and Successful Stabilization

Launched on February 10, 1998, the Geosat Follow On (GFO) satellite faced a critical setback when it tumbled instead of achieving the desired attitude due to incorrect momentum and torque. Utilizing hydrazine thrusters for orbit maintenance and a single solar array, a comprehensive study of telemetry and equations of motion was conducted. After uploading corrected tables, GFO regained functionality and achieved precise sun-pointing, stabilizing within 0.02° and maintaining rates under 0.006°/s, demonstrating the effectiveness of corrective measures.

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Geosat Follow On: Recovery from Attitude Error and Successful Stabilization

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  1. Geosat Follow On (GFO)Just a Sign Error (Partial Credit?) • Three-axis stabilized (MWs), single solar array with 1-axis articulation, hydrazine thrusters for orbit maintenance, 370 kg • Launched Feb 10, 1998 on Taurus • Spacecraft tumbled instead ofachieving correct attitude • Study of telemetry and the eqsof motion led to conclusion that momentum and torque were in the wrong direction • Uploaded corrected tables • Within hours, satellite was sun-pointing within 0.02° with rates of less than 0.006°/s

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