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wb2osz / direwolf

Dire Wolf is a software "soundcard" AX.25 packet modem/TNC and APRS encoder/decoder. It can be used stand-alone to observe APRS traffic, as a tracker, digipeater, APRStt gateway, or Internet Gateway (IGate). For more information, look at the bottom 1/4 of this page and in https://github.com/wb2osz/direwolf/blob/dev/doc/README.md
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9K6 GMSK Decodieren #525

Closed Hackrfan closed 2 months ago

Hackrfan commented 2 months ago

Hello, I am new here. Question. how do i have to configure dire wolf so that i can use 9k6 GMSK
can decode. Telemetry Sonate-2 Satelit Thanks for info vy 73 Georg

wb2osz commented 2 months ago

According to https://www.informatik.uni-wuerzburg.de/en/aerospaceinfo/mitarbeiter/kayal/forschungsprojekte/sonate-2/information-for-radio-amateurs/ the satellite uses normal AX.25 UI frames which direwolf can decode.

Telemetry downlink: During passes over our ground stations in Germany the telemetry downlink will be activated.

Frequency: 437.025 MHz Modulation: 9k6 G3RUH GMSK (F1D) Protocol: AX.25

The protocol format used for encoding the telemetry frames can be found >>here<<

The User Guide, and other documentation, explain how connect to a radio and configure to access an audio device. You would need to add "MODEM 9600" to use 9600 bps G3RUH GMSK because the default is 1200 bps AFSK.

The information part of the frame is in a packed binary format so you would need something custom to make sense of it.

73, John WB2OSZ