- The $GPGGA line contains a string with interesting detail! The reference is http://aprs.gids.nl/nmea/#allgp
- If you compare each reading taken at different times .. you will see that the height has changed.
- It hasn't. It was the same position on the roof .. but the accuracy of the reading has changed!
- the *64 number at the end of the line is a checksum figure.
- the latitude of 3747.60362 is 37 degrees S and the 47.60362 seconds has to be converted to a standard format for latitudes.
