Chinese Amateur Radio Satellite Launches Delayed
CAMSAT says the CAS-7A launch has been postponed until next May, and CAS-5A until next June.
“Because of COVID-19, many things have been delayed,” CAMSAT’s Alan Kung, BA1DU, told ARRL. He said an announcement would be made closer to the announced launches.
CAMSAT said last spring that CAS-7A would launch in mid-September; the launch has been postponed multiple times since first announced. CAS-5A was predicted to launch in October. Both satellites will carry two transponders that include HF, in a configuration similar to that of the Russian RS satellites decades ago.
CAS-7A will be placed into a sun-synchronous orbit with an inclination of 98° at 500 kilometers above Earth. The transponders will have a bandwidth of 30 kHz. According to the IARU amateur satellite frequency coordination page, the HF/HF linear transponder will uplink on 15 meters — 21.245 – 21.275 MHz, and downlink on 10 meters — 29.435 – 21.465 MHz. A CW beacon will transmit on 29.425 MHz. The HF/UHF transponder will uplink at 21.3125 – 21.3275 MHz, and downlink at 435.3575 – 435.3725 MHZ. A CW beacon for that transponder will transmit on 435.430 MHz.
The CAS-5A nanosatellite, with a 6U form factor, carries two HF transponders and two VHF/UHF transponders. While in orbit, it will deploy the tiny CAS-5B femtosatellite, w which will weigh just 0.5 kilograms.
The array of CAS-5A linear transponders will include HF/HF, HF/UHF, and VHF/UHF with 30-kHz passbands (except 15 kHz for the HF/UHF transponder).
CAS-5A will include CW telemetry beacons on HF and UHF. The HF CW beacon will be at 29.465 MHz, and a UHF telemetry beacon will be at 435.57 MHz. Other beacons include the HF/HF transponder beacon at 29.490 MHz; the HF/UHF transponder beacon at 435.505 MHz, and the VHF/UHF transponder beacon at 435.540 MHz. Telemetry will be transmitted at 435.650 MHz. The V/U linear transponder will uplink at 145.820 MHz; the V/U FM transponder will uplink at 145.925 MHz. Terrestrial stations will access the transponders at 21.385 – 21.415 MHz.