[time-nuts] OT - GPS and North
Magnus Danielson
magnus at rubidium.dyndns.org
Sat Nov 21 14:22:20 UTC 2009
iovane at inwind.it wrote:
> Does a stationary (not in motion) GPS receiver know where the North is?
>
> As far
> as I can understand, it doesn't, isn't it?
Not one with a unidirectional antenna, which is the usual stuff.
If you have multiple antennas you can sort out the directions. But it is
an expensive way of achieving it.
If your antenna moves you can detect the heading relative north.
A sensor to sense the magnetic field is fairly inexpensive so that is
being used.
Cheers,
Magnus
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