Gps only updates every 1 to 2 seconds. at 1mph, you only move about 1.5 foot per second. Not withing the accuracy specified by gps standards of 3 meters. The gps expect u to be moving above 1 mph to have any accuracy at all. If gps were accurate at 1 mph, then we would have gps position specifications of 1.5 foot accuracy. We don't have this accuracy ( military prob does). I don't care what anyones says about their gps accuracy. It is not mathematically possible to be more accurate (3 meters) than this because of the time /space intervals between gps satellite transmissions. I'll bet on this.
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