How often does GPS report?

CircleScout satellite hardware reports GPS coordinates every 15 mins.

How accurate is the satellite GPS?

It depends. GPS satellites broadcast their signals in space with a certain accuracy, but what you receive depends on additional factors, including satellite geometry, signal blockage, and atmospheric conditions.  In addition, the pivot can swing causing it to fluctuate.

How is direction determined?

The direction of the pivot is calculated by the GPS coordinates.  The direction is determined after 90 minutes of the pivot running.   You may see the direction change while running which is affected by the speed of the pivot and the fluctuation in the coordinates that the satellite is reporting.  

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