code: def distance_gps2(GPS, GPS2):
      '''distance between two points'''
      if GPS.TimeMS != GPS2.TimeMS:
          # reject messages not time aligned
          return None
      return distance_two(GPS, GPS2f distance_gps2(GPS, GPS2):
      '''distance between two points'''
      if GPS.TimeMS != GPS2.TimeMS:
          # reject messages not time aligned
          return None
      return distance_two(GPS, GPS2)
docs: distance between two points