Two new Chinese amateur radio satellites are now expected to launch on September 15, 2020.
The first of these satellites, CAS-7A, is a 27 kg microsat (750 mm x 650 mm x 260 mm) with three-axis stabilization and several transponders.
The transponders include a 15m to 10m linear transponder (H/t), a 15m to 70cm linear transponder (H/u), and a 2m to 70cm linear transponder(V/u). The satellite also includes a 2m to 70cm (V/u) FM transponder.
Several beacons and data downlinks are also featured, CW beacons on 10m and 70cm, 4.8k or 9.6k GMSK telemetry on 70cm, and a 1 Mbps GMSK image data downlink on 3cm for the on board camera.
IARU coordinated frequencies for the uplinks and downlinks are listed below.
This launch is also expected to carry CAS-7C, a 2U CubeSat with a V/u linear transponder and a CW beacon. Frequencies for CAS-7C have not been coordinated by the IARU at the time of this writing. CAS-7C will also deploy a 1 mm diameter 1080 meter long carbon fiber rope.
CAS-7A and CAS-7C will launch from Jiuquan Satellite Launch Center into a 500 km sun-synchronous orbit with an inclination of 98 degrees.
CAS-7A H/t Linear Transponder
Uplink – 21.245MHz through 21.275 MHz
Downlink – 29.435MHz through 29.465 MHz
CW Beacon 29.425 MHz
CAS-7A H/u Linear Transponder
Uplink – 21.3125 MHz through 21.3275 MHz Downlink – 435.3575 MHz through 435.3725 MHz CW Beacon 435.430MHz
CAS-7A V/u Linear Transponder
Uplink – 145.865 MHz through 145.895 MHz Downlink – 435.385 MHz through 435.415 MHz CW Beacon 435.430MHz
CAS-7A V/u FM Transponder
Uplink 145.950 MHz
Downlink 435.455 MHz
4.8k / 9.6k GMSK telemetry downlink – 435.480 MHz
1 Mbps GMSK image data downlink – 10460.00 MHz
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