CAS-4A and CAS-4B Satellites from CAMSAT Launched

CAS-4A and CAS-4B launch on CZ-4B

CAS-4A and CAS-4B launch on CZ-4B

Two of CAMSAT’s amateur radio payloads piggybacked on the optical remote sensing micro-satellites OVS-1A and OVS-1B were launched at 0300 GMT on Thursday, June 15, 2017 from the Jiuquan Satellite Launch Center, on the CZ-4B launch vehicle. The primary payload of this launch is a hard X-ray modulation telescope satellite (HXMT).

Satellite CAS-4A/OVS-1A:
● Architecture: Micro-satellite
● Dimensions: 494Lx499Wx630H mm
● Mass: 55 kg
● Stabilization: three-axis stabilization system with its +Y surface facing the earth
● Primary Payload: optical Camera with 1.98m resolution

CAS-4A Orbit:
● Orbit type : Sun synchronization orbit
● Apogee: 524 km
● Inclination: 43°
● Period: 95.1 minutes

CAS-4A Amateur Radio Payload:
● Call sign: BJ1SK
● VHF Antenna: one 1/4λ monopole antenna with max. 0 dBi gain located at +Z side
● UHF Antenna: one 1/4λ monopole antenna with max. 0 dBi gain located at -Z side
● CW Telemetry Beacon: 145.855 MHz 17 dBm
● AX.25 4.8k Baud GMSK Telemetry: 145.835 MHz 20 dBm
● U/V Linear Transponder Downlink: 145.870 MHz 20 dBm, 20 kHz bandwidth, Inverted
● U/V Linear Transponder Uplink: 435.220 MHz

CAS-4 Satellite

CAS-4 Satellite

Satellite Name: CAS-4B/OVS-1B:
● Architecture: Micro-satellite
● Dimensions: 494Lx499Wx630H mm
● Mass: 55 kg
● Stabilization: three-axis stabilization system with its +Y surface facing the earth
● Primary Payload: optical Camera with 1.98m resolution

CAS-4B Orbit:
● Orbit type : Sun synchronization orbit
● Apogee: 524 km
● Inclination: 43°
● Period: 95.1 minutes

CAS-4B Amateur Radio Payload:
● Call sign: BJ1SL
● VHF Antenna: one 1/4λ monopole antenna with max. 0 dBi gain located at +Z side
● UHF Antenna: one 1/4λ monopole antenna with max. 0 dBi gain located at -Z side
● CW Telemetry Beacon: 145.910 MHz 17 dBm
● AX.25 4.8k Baud GMSK Telemetry: 145.890 MHz 20 dBm
● U/V Linear Transponder Downlink: 145.925 MHz 20 dBm, 20 kHz bandwidth, Inverted
● U/V Linear Transponder Uplink: 435.280 MHz

73!
Alan Kung, BA1DU

CAMSAT Press Release PDF

Keplerian Two Line Elements (TLEs) ‘Keps’ for new satellites launched in past 30 days
http://celestrak.com/NORAD/elements/tle-new.txt

CAS-4A and CAS-4B

CAS-4A and CAS-4B Linear Transponder Satellite Payloads

XW-2A satellite launched September 19, 2015

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/

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/