CAS-4A and CAS-4B – Frequencies Coordinated

XW-2A satellite launched September 19, 2015

XW-2A satellite was launched September 19, 2015

CAMSAT has worked closely with a Beijing Government aerospace contractor to build two satellites with amateur radio linear transponder payloads. IARU record a launch had been planned for March 31, 2017 from Taiyuan into a 524 km orbit with an inclination of 42 degrees but as yet there is no confirmation of launch date.

Both will carry a 435/145 (U/V) 20 dBm (100 milliwatt) SSB/CW linear transponder, a 2m CW 17 dBm (50 mW) telemetry beacon and an AX.25 4.8 kbps GMSK 20 dBm (100 mW) telemetry downlink.

The two micro-satellites will also carry optical remote sensing missions. Planned to be 494x499x630 mm dimension regular square shape and approximately 50 kg mass with three-axis stabilization system.

These frequencies have been coordinated by the IARU Satellite Frequency Coordination Panel:

CAS-4A
• Linear transponder downlink 145.870 MHz, emission designator 20K0V8WWF, output power 20 dBm
• Linear transponder uplink 435.220 MHz
• CW telemetry beacon 145.855 MHz, emission designator 100HA1AAN, output power 17 dBm
• GMSK telemetry 145.835 MHz, emission designator 16K0F1DCN, output power 20 dBm

CAS-4B
• Linear transponder downlink 145.925 MHz, emission designator 20K0V8WWF, output power 20 dBm
• Linear transponder uplink 435.280 MHz
• CW telemetry beacon 145.910 MHz, emission designator 100HA1AAN, output power 17 dBm
• GMSK telemetry 145.890 MHz, emission designator 16K0F1DCN, output power 20 dBm

IARU Satellite Frequency Coordination pages http://www.amsat.org.uk/iaru/

CAS-4A and CAS-4B to have Ham Radio Linear Transponders

XW-2A satellite launched September 19, 2015

XW-2A satellite was launched September 19, 2015

CAMSAT is working closely with a Beijing Government aerospace contractor to build two satellites with amateur radio linear transponder payloads.

Both will carry a 435/145 (U/V) 20 dBm (100 milliwatt) SSB/CW linear transponder, a 2m CW 17 dBm (50 mW) telemetry beacon and an AX.25 4.8 kbps GMSK 20 dBm (100 mW) telemetry downlink.

Each set of amateur radio equipment will have the same technical characteristics, but will have different frequencies for the 70cm band uplinks and 2m band downlinks.

The two micro-satellites will also carry optical remote sensing missions. Planned to be 494x499x630 mm dimension regular square shape and approximately 50 kg mass with three-axis stabilization system.

Expecting a launch from Taiyuan on March 31, 2017 into a 524 km orbit with an inclination of 42 degrees.

IARU Satellite Frequency Coordination pages http://www.amsat.org.uk/iaru/