CAMSAT has announced the launch of its CAS-4A and CAS-4B linear transponder payloads. These payloads piggyback on the OVS-1A and OVS-1B optical remote sensing satellites, which were launched along with the hard X-ray modulation telescope (HXMT) satellite aboard a CZ-4B rocket from Jiuquan Satellite Launch Center at 03:00 UTC on June 15, 2017. Both satellites are in a 43 degree inclination orbit with an apogee of 524 km. The satellites should be among the following four objects from the launch, from Celestrak’s tle-new.txt:
2017-034A 1 42758U 17034A 17166.44020951 .00000000 00000-0 00000+0 0 9996 2 42758 43.0132 296.0634 0006996 337.6257 22.4799 15.08374244 50 2017-034B 1 42759U 17034B 17166.44014948 -.00077158 00000-0 00000+0 0 9995 2 42759 43.0111 296.0584 0007012 333.6014 26.4991 15.08628895 40 2017-034C 1 42760U 17034C 17166.44015010 .00000000 00000-0 00000+0 0 9999 2 42760 43.0156 296.0555 0006945 344.9860 15.1295 15.08497794 52 2017-034D 1 42761U 17034D 17166.44008307 .00000000 00000-0 00000+0 0 9991 2 42761 43.0142 296.0593 0008314 328.2359 31.8502 15.08952386 37
Both satellites carry 20 kHz U/v linear transponders as well as CW beacons and a digital telemetry downlink. Frequency information is as follows:
| CAS-4A – U/v Inverting Analog SSB/CW | |||
| Uplink LSB | 435.210 MHz | through | 435.230 MHz |
| Downlink USB | 145.880 MHz | through | 145.860 MHz |
| CW Beacon 145.855 MHz. Digital Telemetry 145.835 MHz 4.8kbps GMSK | |||
| CAS-4B – U/v Inverting Analog SSB/CW | |||
| Uplink LSB | 435.270 MHz | through | 435.290 MHz |
| Downlink USB | 145.935 MHz | through | 145.915 MHz |
| CW Beacon 145.910 MHz. Digital Telemetry 145.890 MHz 4.8 kbps GMSK | |||
For more information about these satellites, see the CAMSAT CAS-4A and CAS-4B News Release