Hi,

I wanted to go through a set of GPS tracks created by my GT-31 and find top speeds and similar so I created a simple command-line tool using the Go language.

If anyone is interested: github.com/vvidovic/gps-stats/tree/main
You can download releases for Linux/Mac/Windows under releases: github.com/vvidovic/gps-stats/releases

It would be easy to update it to support GPX or some other file format but I didn't need that part yet so it currently parses only SBN files.

If someone (other than me) finds this useful, please let me know and feel free to create a PR or suggest some additions to the app.

I added a feature to save cleaned-up track (without erroneous track points) with this app.

My GT-31 broke after my protective plastic case ripped open and I bought a GPS watch. I bought an Amazfit T-REX Pro, seems like a great value for money - I just didn't want to spend too much on this (instead of buying a new foil).
However, the new watch have more obvious errors in saved GPS tracks and when I uploaded my first two tracks to KA72 I realized that KA-72 didn't filter those errors and I had much higher 2-second scores than I should have.
Since my gps-stats app already does a good job of filtering out erroneous track points, I added a feature to save filtered track as a new GPX file that can be used for KA-72 upload.

Feel free to use it, it supports Linux, Mac & Windows.