Add support for QMR-KWT 2

[deckbsd]

This pull request add the support for QMR-KWT 2

There are 2 transmitters, because at the beginning the sat was transmitting at 2k4 bauds and changed recently to 9k6. I kept 2k4 just in case, if the team decide to switch back to it again.

Here is a test of decoding signals at 9k6 bauds using the wav file from this observation :

run command : gr_satellites 98448 --wavfile out.wav --samp_rate 48e3 --start_time 2026-02-28T10:19:45 --throttle

-> Packet from 9k6 FSK USP downlink
Container:
    header = Container:
        addresses = ListContainer:
            Container:
                callsign = u'R2ANF' (total 5)
                ssid = Container:
                    ch = False
                    ssid = 0
                    extension = False
            Container:
                callsign = u'RS95S' (total 5)
                ssid = Container:
                    ch = False
                    ssid = 1
                    extension = True
        control = 0x00
        pid = 0xF0
    info = b'FB\x02\x00\x01\x00\x19\x00\xfd\x00\xffr\x1e\x12\x00\x0e^\x1f\xa2i\n\xa0\x02\x00\x80%\x00\x00*\x00\xa0\x1e\x01!\xed\x04\x00\x01\x000\x004\x05g\x05.\x05N\x04I\x04\x9d\x04\x0f\x00\x00\x000\x00\x00\x00\x00\x00\x00\x00E\xfe\xda\xfd\x06\xfe\xfa\xfd\x00@\x00\x00\xb0\x1e\xbd\xa0\x02\x00P\x98\x97Z\x9a\x04' (total 89)
-> Packet from 9k6 FSK USP downlink
Container:
    header = Container:
        addresses = ListContainer:
            Container:
                callsign = u'R2ANF' (total 5)
                ssid = Container:
                    ch = False
                    ssid = 0
                    extension = False
            Container:
                callsign = u'RS95S' (total 5)
                ssid = Container:
                    ch = False
                    ssid = 1
                    extension = True
        control = 0x00
        pid = 0xF0
    info = b'FB\x02\x00\x01\x00\x19\x00\xfd\x00\xffx\x1e\x12\x00\x0e|\x1f\xa2i(\xa0\x02\x00\x80%\x00\x00*\x00\xa0\x1e\x01!\xed\x04\x00\x01\x000\x00\xb0\x05\xa5\x05Q\x05\xc8\x04\xc3\x04\xda\x04\x14\x00\x00\x001\x00\x00\x00\x00\x00\x00\x00Q\xfe\xf3\xfd%\xfe\x0c\xfe\x00@\x00\x00\xb0\x1e\xdb\xa0\x02\x00n\x98\x97Z\x9a\x04' (total 89)

[daniestevez]

Is the deviation 600 Hz also for 9600 baud? That seems too small. MSK corresponds to 2400 Hz deviation.

[deckbsd]

Good catch, at least it works, i just tested 2400 Hz and it of course it works too, so what do you want me to do ?

Same results with 2400 Hz :

-> Packet from 9k6 FSK USP downlink
Container:
    header = Container:
        addresses = ListContainer:
            Container:
                callsign = u'R2ANF' (total 5)
                ssid = Container:
                    ch = False
                    ssid = 0
                    extension = False
            Container:
                callsign = u'RS95S' (total 5)
                ssid = Container:
                    ch = False
                    ssid = 1
                    extension = True
        control = 0x00
        pid = 0xF0
    info = b'FB\x02\x00\x01\x00\x19\x00\xfd\x00\xffr\x1e\x12\x00\x0e^\x1f\xa2i\n\xa0\x02\x00\x80%\x00\x00*\x00\xa0\x1e\x01!\xed\x04\x00\x01\x000\x004\x05g\x05.\x05N\x04I\x04\x9d\x04\x0f\x00\x00\x000\x00\x00\x00\x00\x00\x00\x00E\xfe\xda\xfd\x06\xfe\xfa\xfd\x00@\x00\x00\xb0\x1e\xbd\xa0\x02\x00P\x98\x97Z\x9a\x04' (total 89)
-> Packet from 9k6 FSK USP downlink
Container:
    header = Container:
        addresses = ListContainer:
            Container:
                callsign = u'R2ANF' (total 5)
                ssid = Container:
                    ch = False
                    ssid = 0
                    extension = False
            Container:
                callsign = u'RS95S' (total 5)
                ssid = Container:
                    ch = False
                    ssid = 1
                    extension = True
        control = 0x00
        pid = 0xF0
    info = b'FB\x02\x00\x01\x00\x19\x00\xfd\x00\xffx\x1e\x12\x00\x0e|\x1f\xa2i(\xa0\x02\x00\x80%\x00\x00*\x00\xa0\x1e\x01!\xed\x04\x00\x01\x000\x00\xb0\x05\xa5\x05Q\x05\xc8\x04\xc3\x04\xda\x04\x14\x00\x00\x001\x00\x00\x00\x00\x00\x00\x00Q\xfe\xf3\xfd%\xfe\x0c\xfe\x00@\x00\x00\xb0\x1e\xdb\xa0\x02\x00n\x98\x97Z\x9a\x04' (total 89)

[deckbsd]

anyway i changed it, let's get the right one.

[daniestevez]

If there isn't documentation that specifies what is the deviation and we haven't measured it, we should not include the deviation in the SatYAML file. If the SatYAML file does not include a deviation, then gr-satellites will choose a reasonable deviation given the baudrate, which is preferable than having a wrong deviation there.

In this case I think we should remove the deviation from both transmitters.

[deckbsd]

Noted and done.

[daniestevez]

Thanks! This looks great now. Merging.