SiriusSat-1,2 satellites amateur radio information

Radio amateurs from all over the world are welcome to participate in receiving of SiriusSat-1 and SiriusSat-2 satellites signals. We have prepared a telemetry decoding software (SPUTNIX Telemetry Viewer) which provides text and visual monitoring and helps to understand all the data transmitted down from the orbit. By default software is connected to to help us collecting precious data from SiriusSats, but it can also operate in standalone mode.

SPUTNIX deployed a ground station in Skolkovo Technopark to control satellites


The start of EVA 2018-08-15T15:58Z.
2SiriusSats deployment from T+00:10:00 to T+00:18:00.
CubeSats will start to transmit in 15 mins after RBF is removed.
So, according to the plan they will start beaconing about 2018-08-15T16:23Z every 30 secs.


Frequences and call signs:

SiriusSat-1 call sign RS13S, transmitter frequency is 435,570 MHz SSID 1.

SiriusSat-2 call sign RS14S, transmitter frequency is 435,670 MHz SSID 2.

Both use GMSK 4800 modulation with AX.25 G3RUH standard protocol.


SPUTNIX Telemetry Viewer can be used along with typical SDR software like Orbitron/SDRSharp and UZ7HO's SoundModem/direwolf through AGWPE/KISSTCP interfaces. Configuration file path is "resources/config.xml".


To get Dire Wolf working in 4800 G3RUH mode it is possible to twice both sampling and bit rates. Like:

$ direwolf -r 96000 -B 9600

assuming native 48000 audio sample rate...


SPUTNIX Telemetry Viewer (in Russian or English version), as well as test signals can be downloaded from our website here

Any information on the received signal from satellites (saw the spectrum, heard the modulation, decoded the beacons) please send to

To be more interesting - the first three persons who received the package from the satellites and informed us about this in any way, including automatic sending of the message by our decoder, will receive prizes - the book on the space theme! 

Have a successful reception!