GPS Sim

This app allows you to broadcast GPS baseband signal data streams.

Generator

You can use gps-sdr-sim to generate data for this app.

gps-sdr-sim -e brdc3540.14n -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.

Sample rate and frequency specification

Create BBD_NNNN.TXT with:

sample_rate=2600000
center_frequency=1575420000

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 BBD_NNNN.C8

You also need to BBD_NNNN.TXT as specified above.

References

https://blog.csdn.net/shukebeta008/article/details/103270214