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Updated GPS Sim (markdown)

Erwin Ried 2020-04-28 01:10:44 +02:00
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GPS-Sim.md

@ -3,9 +3,12 @@ This app allows you to broadcast GPS baseband signal data streams.
## Generator
You can use [gps-sdr-sim](https://github.com/osqzss/gps-sdr-sim) to generate data for this app.
`gps-sdr-sim -e brdc3540.14n -l LAT,LONG,HEIGHT -o BBD_NNNN.C8`
`gps-sdr-sim -e RINEX_NAVIGATION_FILE -l LAT,LONG,HEIGHT -o BBD_NNNN.C8`
That will create `BBD_NNNN.C8`, but note that you also need to specify its sample rate and frequency in another file, as explained below.
### RINEX navigation file for GPS ephemerides
Download the latest file for this parameter directly from Nasa: https://cddis.nasa.gov/archive/gnss/data/daily/
### Sample rate and frequency specification
Create `BBD_NNNN.TXT` with:
```