[TowerTalk] Compass and GPS

[Doug Ronald]

>I guess I'm not sure why some have additional sensors if it's possible to
be as accurate, with no movement, from GPS.

 

A GPS receiver with only one antenna cannot determine the direction it is
pointed. Sure, with some movement X, Y, Z changes and a differential
estimate is made. So for near-zero velocities, a flux-gate compass is used
in the Garmins for true heading determination.

 

-Doug

AE6SY