AMSAT satellites Fox-1A through Fox-ID (the FM Foxes) all do or will send telemetry at about 200 bits-per-second using a technique called Data Under Voice (DUV). DUV uses Frequency Shift Keying (FSK) to carry data in the baseband spectrum below about 300Hz. Fox-IE (officially known as RadFxSat-2), while using many of the same hardware components, contains a linear transponder with 1200 bits-per-second telemetry sent as Binary Phase Shift Keying (BPSK] on one side of the pass band. This paper describes the Fox-IE telemetry including a new feature called Whole Orbit Data. It does not describe the modulation technique itself.
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