The CAS-2A1 and CAS-2A2 satellites will be combined into a binary star system for Amateur Radio communication and education. “There will be a radio link between the two satellites when the satellites are in suitable positions in their orbits, so that Amateur Radio communication coverage can be extended,”

BA1EO CAS- 2 Version A1CAMSAT and students at the Qian Youth Space Academy have been working on the next satellite CAS-2 this is the successor of the first CAMSAT amateur radio satellite CAS-1 (aka XW-1, HO-68). The launch of CAS-2 is planned for 2014 into a 1000 km orbit with an inclination of 12 degrees. This orbit means it may not be receivable in those countries at high latitudes. It is understood that most of the room in CAS-2 will be taken up by the primary (non-amateur) payload and it has only been possible to fit a single channel FM amateur transponder in the satellite. The announcement of May 20 indicates that two separate CAS-2 satellite structures are being built – A1 and A2.

CAS-2 will launch at the of end 2014 with a new Chinese missile from a new Chinese launch site into a sun-synchronous orbit to start. It is also developing another satellite to be 3-axis stabilized and is to be launched in the GTO. Date is still unknown, but here I would suspect the 12 inclination more.

Orbital parameters

Name                 CAS-2
NORAD                ?
COSPAR designation   ?
Inclination (degree) ?
RAAN                 ?
Eccentricity         ?
ARGP                 ?
Orbit per day        ?
Period               ?
Semi-major axis      ?
Perigee x apogee     ?
Drag factor          ?
Mean anomaly         ?


Unknown at this moment


Unknown at this moment

Mode and Antenna Polarization



Dimensions: 270×270×250 mm
2 meter CW telemetry beacon: 100 mW
2 meter AX.25 digital telemetry beacon: 500 mW
2 meter FM voice beacon: 500 mW
U/V mode linear transponder: 50 kHz bandwidth, 500 mW
L/S mode linear transponder: 200 kHz bandwidth, 320 mW
U/V mode APRS repeater


Dimensions: 270×270×250 mm
70 centimeter CW telemetry beacon: 100 mW
70 centimeter AX.25 digital telemetry beacon: 500 mW
13 centimeter CW telemetry beacon: 200 mW
3 centimeter CW telemetry beacon: 200 mW
V/U mode linear transponder: 500 mW

All following satellites are equipped with substantially the same Amateur Radio payloads, a U/V mode linear transponder, a CW telemetry beacon and an AX.25 19.2k/9.6k baud GMSK telemetry downlink. Each Amateur Radio complement has the same technical characteristics, but will operate on different 70 centimeter uplink and 2 meter downlink frequencies.


CAS-2 launch information unknown at the moment.

Homepage and other references:

Amsat-DL Mailing-list forum [at]
Amsat-UK CAS-2
Further information in Google English can be seen at CAS-2 Satellite