You may wish to delete all underway data. One possible reason for this is a lack of Ashtech heading corrections. If you only have gyro data, you may only trust on-station data. This is an artificial example, but shows the effect of lowering the default cutoff for deleteing underway data from 100m/s to 6.5m/s:
100m/s is "underway" (i.e. flag nothing as underway) ![]() |
6.5m/s is "underway" (i.e. flag some as underway) ![]() |