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ARRL Satellite Bulletin ARLS007 (2020)

ARLS007 Chinese Amateur Radio Satellite Launches Delayed

QST de W1AW  
Space Bulletin 007  ARLS007
From ARRL Headquarters  
Newington, CT  September 29, 2020
To all radio amateurs

ARLS007 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 degrees 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 to 21.275 MHz, and
downlink on 10 meters - 29.435 to 29.465 MHz. A CW beacon will
transmit on 29.425 MHz. The HF/UHF transponder will uplink at
21.3125 to 21.3275 MHz, and downlink at 435.3575 to 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, which will weigh just 0.5

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

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.


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