CAMSAT CAS-6 satellite

CAMSAT CAS-6 Satellite will be Launched soon successfully launched!

CAMSAT's amateur radio payload CAS-6 piggybacked on a technology test satellite TIANQIN-1 will be launched at 3:21 UTC on December 20, 2019 at the Taiyuan Satellite Launch Center of China using a CZ-4B launch vehicle. The primary payload of this launch is China-Brazil Earth Resources Satellite CBERS-4A.

CAMSAT News Release for CAS-6 Satellie.pdf

CAS-6 Satellites Digital Telemetry Description.pdf

CAS-6 CW Telemetry Encoding Format.pdf

Orbit type : SSO

Apogee : 629km

Inclination : 97.89˚

Period : 97min

Call sign: BJ1SO

VHF Antenna: one 1/4λ monopole antenna

UHF Antenna: one 1/4λ monopole antenna

CW Telemetry Beacon: 145.910MHz 17dBm

AX.25 4.8k Baud GMSK Telemetry: 145.890MHz 20dBm

U/V Linear Transponder Downlink: 145.925MHz 20dBm, 20kHz bandwidth, Inverted

U/V Linear Transponder Uplink: 435.280MHz

The launch was successful..

Dear Peter,

Thank you!

Today CAS-6 has been successfully launched, the satellite is currently in orbit testing, the amateur radio payload is expected to be operational in about three days.

Attached photo of CAS-6

73!

Alan, BA1DU

IZ5ILX

Hi Vale,

unfortunately nobody seems to have received any signals from CAS-6.

There are also no news/reports regarding the actual status, which might not be a good sign as well..

73s Peter

Good News from CAS-6

Hello,

The CAS-6 V/UHF antenna has been deployed today. Due to some OBC failures, CW beacon and GMSK telemetry are not working properly. At present, only the carriers are transmitted on the two frequencies, the linear transponder has been put into operation. We will then try to diagnose and then determine whether the CW and telemetry data stream transmission can be recovered.

● CW Telemetry Beacon: 145.910MHz

● AX.25 4.8kbps GMSK Telemetry: 145.890MHz

● U/V Linear Transponder Downlink: 145.925MHz, 20kHz bandwidth, Inverted

● U/V Linear Transponder Uplink: 435.280MHz

TLE:

CAS-6(2019-093C)

1 44881U 19093C 20170.81187924 -.00001118 00000-0 -13581-3 0 9991

2 44881 97.9575 246.8556 0015830 36.2280 323.9959 14.81412013 26893

73!

Alan Kung, BA1DU

I have received some CW signals... constant on/off... see Audio...

https://network.satnogs.org/observations/2412513/

[Update]

just received CAS-6 with strong signals, but you have a few seconds seconds every 5 seconds or so to make a QSO..

https://network.satnogs.org/observations/2412514/

Hi Bert,

I use Airspy R2 SDR, SSB SP-200 Preamp and ANjo Eggbeater.

It's only a very simple setup at the moment to run the SatNogs software, but it works very well to see what's going on in the 2m satellite band.

73s Peter

Yes, the whole transponder seems to have that issue.

Passband and beacons are affected as be seen in the waterfall diagrams.

https://network.satnogs.org/ob…ver=&station=&start=&end=

On/Off pattern sometimes seems to be changing, perhaps depending on BUS voltage, loads or temperature...

A few people seem to have managed to make a QSO still..

Quote from HB9SKA

Then I think it's the same failure as on XW-2D.

Hi Thomas,

you are right... https://network.satnogs.org/observations/2434585/

It's the same kind of fingerprint... so maybe a hardware flaw or software issue...

73s Peter