Jim, AC4AV: I have not heard CW telemetry from RS-22 for over a week or so.
A couple days ago, I did hear some interesting audio, but caught the last few seconds before LOS.
audio spectrum
RS-22 is sending short bursts of telemetry every 5 seconds on 435.352 MHz (FM)
This morning I could hear heavy downlink traffic. This data transmission system is called DOKA.
The DOKA modulation is PM with Manchester-encoded data on sidebands.
It uses 4800Bd data, one block contains 256 frames with sync wsequence and frame counter. The length of a RS-22 frame is 608 bit (76 byte).
DOKA telemetry block in a hexdump view
Hi,
I am pretty new to amateur satellite communications. I am working on some link budgets for RS-22 but I am not able to find info about it’s telemetry. Anybody has any idea where I can find more info? other than the amsat website?
Thanks a lot
Hi, it’s very difficult to get some useful information about the russian satellites. Or rather impossible …
Can you tell us more about your link budget works???
73, Mike