New Amateur Radio FM Transponder CubeSat

The BY70-1 CubeSat launched on December 28 from the Taiyuan Space Launch Centre in China, but in a lower orbit than intended. The satellite carries an Amateur Radio FM transponder. BY70-1 was intended to go into a 530-kilometre (approximately 329-mile) circular Sun-synchronous orbit, but it appears the orbit is 524 x 212 kilometres, which will give the spacecraft an orbital lifetime of just a month or two.

Paul Stoetzer, N8HM, reported working Wyatt Dirks, AC0RA, through the FM transponder during the 1709 UTC pass on December 28.

Uplink requires precise frequency adjustment, and there’s a delay on the downlink, but the signal is strong”, Stoetzer said.

BY70-1 is a 2U CubeSat project for education and Amateur Radio. It features 3-axis stabilization and deployable solar panels. In addition to the FM transponder, BY70-1 has a camera, and plans call for downloading images and telemetry via a 9600 bps BPSK downlink.

The IARU Amateur Satellite Frequency Coordination pages list an uplink of 145.920 MHz, and a downlink of 436.200 MHz.

AMSAT-UK has more information online at: https://amsat-uk.org/2016/12/27/by70-1-fm-transponder-satellite/

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