[time-nuts] OT - GPS and North

Tom Van Baak tvb at LeapSecond.com
Sat Nov 21 17:47:52 UTC 2009


> Does a stationary (not in motion) GPS receiver know where the North is?

No, a stationary object is a point, not a line or a vector.
The notion of North (or any direction) has no meaning
to a point, by definition.

There are two exceptions. If during your long polar trek
the latitude is ±90º 00' 00.0" and the longitude seems to
wander all over the map then, yes, your stationary GPS
receiver finally knows where North is. Examples:

http://www.klipsi.ch/at_Northpole/at_Northpole.htm
http://www.icetent.com/south_pole.htm
http://www.4x4offroads.com/south-pole-expedition-world-record.html

/tvb






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