XW-2A satellite was launched September 19, 2015

Nico PA0DLO reports the CAS-4A and CAS-4B amateur radio linear transponder payloads were carried on the Earth imaging microsatellites OVS 1A and OVS 1B which were launched at 0300 UT on Thursday, June 15, 2017.

CAMSAT News Release CAS-4A and CAS-4B Satellites from CAMSAT Launched Download PDF Here

CAMSAT worked closely with a Beijing Government aerospace contractor to build two satellites with amateur radio linear transponder payloads. The launch from the Jiuquan Space Center was planned to put the satellites into a 524 km orbit with an inclination of 43 degrees.

Both 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/