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Two New Chinese Ham Satellites Expected to Launch in September

Two New Chinese Ham Satellites Expected to Launch in September

Two new Chinese amateur radio satellites are expected to launch on September 15. CAS-7A and CAS-7C follow in the wake of numerous amateur radio satellites put into space by CAMSAT. CAS-7A, a 27 kilogram microsat, will carry several transponders, including a 15-meter-to-10-meter (H/t) linear transponder, and a 2-meter-to-70-centimeter (H/u) linear transponder. CAS-7A also will include a V/u (2 meters to 70 centimeters) FM voice transponder. According to the International Amateur Radio Union (IARU) satellite coordination site, CAS-7A is planned to have CW beacons on both 10 meters and 70 centimeters, 4.8k or 9.6k GMSK telemetry on 70 centimeters, and a 1 Mbps GMSK image data downlink on 3 centimeters for an onboard camera.

CAS-7C is a 2U CubeSat carrying a V/u linear transponder and a CW beacon. IARU has not yet coordinated frequencies for CAS-7C, which is to deploy a 1,080-meter (3,543 feet) long, 1-millimeter carbon fiber rope.

The two satellites will launch from Jiuquan Satellite Launch Center into a 500-kilometer sun-synchronous orbit with an inclination of 98°. 

Frequency:
1.CAS-7A H/T linear transponder:
Uplink frequency 21.245 MHz-21.275 MHz
Downlink frequency 29.435 MHz-29.465 MHz
CW beacon 29.425 MHz


2.CAS-7A H/U linear transponder:
Uplink frequency 21.3125 MHz-21.3275 MHz
Downlink frequency 435.3575 MHz-435.3725 MHz
CW beacon 435.430 MHz


3.CAS-7A V/U linear transponder:
Uplink frequency 145.865 MHz to 145.895 MHz
Downlink frequency 435.385 MHz to 435.415 MHz
CW beacon 435.430 MHz


4.CAS-7A V/U frequency modulation (FM) transponder:
Uplink frequency 145.950 MHz
Downlink frequency 435.455 MHz
4.8k/9.6k GMSK telemetry signal downlink frequency 435.480 MHz
1Mbps GMSK image data downlink frequency 10460.00 MHz 


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