Comment on GPS vs. Glonass vs. GalileoparentComments−hugh-avherald3yI'm somewhat curious how one would determine the true position to mm accuracy so as to compare. Put another way, if something says you're at these coordinates, how do you conclude "it should be 1 mm to the north"?
Comments
I'm somewhat curious how one would determine the true position to mm accuracy so as to compare. Put another way, if something says you're at these coordinates, how do you conclude "it should be 1 mm to the north"?