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Updated GPS Sim (markdown)

Erwin Ried 2020-04-26 21:45:06 +02:00
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GPS-Sim.md

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This app allows you to broadcast GPS baseband signal data streams. You can use [gps-sdr-sim](https://github.com/osqzss/gps-sdr-sim) to generate data for this app.
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.
## Example
`gps-sdr-sim -e brdc3540.14n -l LAT,LONG,HEIGHT -o BBD_NNNN.C8`
That will create `BBD_NNNN.C8`
That will create `BBD_NNNN.C8` and then create `BBD_NNNN.TXT` with:
### Sample rate and frequency specification
Create `BBD_NNNN.TXT` with:
```
sample_rate=2600000
center_frequency=1575420000
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Copy to your PortaPack MicroSD and open the file from the GPS Sim app.
## Example
We can create a realistic movement using a NMEA GGA stream generator like https://nmeagen.org/. In this website create several multi point lines with the positions you want. Download the NMEA file clicking "Generate NMEA file".
`gps-sdr-sim.exe -e brdc3540.14n -g OUTPUT.nmea -d DURATION -o SOMEPLACE.B8`
You also need to `SOMEPLACE.TXT` as specified above.
## References
https://blog.csdn.net/shukebeta008/article/details/103270214