Taurus-1 (Jinniuzuo-1) carrying an amateur radio FM to Codec-2 transponder was launched on a CZ-4B rocket from the Taiyuan Satellite Launch Center on Thursday, September 12 at 0326 GMT.
Taurus-1 is a CubeSat project developed by Aerospace System Engineering Research Institute of Shanghai for youth education and amateur radio.
The transponder is similar to that used on LilacSat-1 receiving FM with 67 Hz CTCSS on 145.820 and retransmitting it as Codec-2 9600 bps BPSK digital voice along with the telemetry data on a nominal frequency of 435.840 MHz +/-10 kHz Doppler shift.
On Friday, September 13, Mark Jessop VK5QI tweeted:
“Good signals from #Taurus-1 on 435.840 MHz! Doesn’t look like the FM/Codec2 Transponder is enabled yet though (no response on 436.760 MHz when transmitting on 145.820 MHz)” Note: this was sent before it was realized Codec2 voice and the telemetry were on the same frequency.
Codec2 9600 bps BPSK Downlink information by Daniel Estévez EA4GPZ
A paper by Paul Stoetzer N8HM on the FM-Code2 transponder is at
Nico Janssen PA0DLO reports the actual telemetry downlink frequency is 435.8387 MHz and Doppler measurements show that Taurus 1 is object 44530 (2019-059C).
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