Time format and absolute time when exporting data

[Jens Noriʇzsɔɥ]

This means that either

1. the GPS measurement of my mobile phone is not that good at all or that
   
2. the times of the GPS and the accelerometer sensors in the data export of phyphox are not well aligned or
   
3. something else which I did not think of up to now happened.
   

Reasonable assumptions. Location accuracy of smartphones is (advertised as) down to a few meters.

I would recommend to “sync” your GPS device to a visible event on your smartphone, a certain gully cover or speed bump at a known position – or hit your smartphone at a certain point of interest…