Tracker config files (Gpredict, SatPC32)
How desktop trackers store transponder definitions so they can tune your radio with Doppler correction.
- Source
- https://github.com/csete/gpredict/blob/master/data/trsp
- Access
- Bundled with the software; community-maintained updates on GitHub and AMSAT.
- Format
- INI (Gpredict .trsp) / CSV (SatPC32 Doppler.sqf)
Schema
| Field | Type | Note |
|---|---|---|
| Gpredict <norad>.trsp [section] | string | Transponder name, e.g. [Mode V/U FM] |
| UP_LOW, UP_HIGH | Hz | |
| DOWN_LOW, DOWN_HIGH | Hz | |
| MODE | string | FM, USB, … |
| INVERT | bool | |
| SatPC32 Doppler.sqf line | CSV | Name,DownMHz,UpMHz,DownMode,UpMode,NOR|REV,DownOffset,UpOffset,Comment |
Example
# Gpredict 27607.trsp [Mode V/U FM Voice] UP_LOW=145850000 DOWN_LOW=436795000 MODE=FM # SatPC32 Doppler.sqf RS-44,435640.0,145965.0,USB,LSB,REV,0,0,Linear SO-50,436795.0,145850.0,FM,FM,NOR,0,0,67.0Hz
Gotchas
- Gpredict files are keyed by NORAD ID, not name.
- Frequencies are kHz in SatPC32, Hz in Gpredict.