gross approximation wrote:
but if the course cuts through areas where there is a weak signal or no signal, then GPS measurements will always be off. having a bunch definitely helps, but only if you are sure that any errors are random.
Well I lean towards believing that when the signal is weak or occasionaly lost, random error will be releatively large and systematic error relatively small, but of course I have no way of really knowing.
It seems like people that own these things would know. When you run places where you occasionally lose the signal does the GPS always report a distance that is too long or always report a distance that is too short, or is it pretty random?