Record GPS (GNSS) during RAW file recording for offline analysis of mobile reception

[andimik]

The aim is to analyse mobile reception (for later use) with raw files. So basically, the idea is to capture GPS (GNSS) data in a separate file during a (mobile) raw file recording. When playing this raw file, the app looks for the GPS (GNSS) file in the same directory and the map will show the captured position at that time, not the current one.

A similar approach (Windows only) is described on https://qirx.softsyst.com/QIRXOverview

Raw Data File Recorder and Player: The raw I/Q data can be saved to a file. A second file is recorded automatically, containing the GNSS position. It is possible to replay I/Q-data files, having been stored in 8-bit or 16-bit format. On the GUI, you can position ("seek") to any arbitrary timed position in the recorded data. As a consequence, long raw recordings become usable, usually consisting of very large (many GB) raw data files. To be able to get a quick impession about special events in the waterfall, a "Fast Forward" selection is possible, speeding the replay up to a factor of 8.
With recordings having made in a mobile environment, the moving position of the recorder is displayed on the map, working also with Fast Forward.