I used my phone (running RaceChrono) + bluetooth OBD2 to record my runs. It only takes a gps reading once a second, and seems to interpolate location sometimes. Some runs looked like I went way off course, even when I was clean.
The software is fine, but I will need a better gps receiver with a faster refresh rate.
The software is fine, but I will need a better gps receiver with a faster refresh rate.