On Fri, 18 Apr 2008 09:51:13 -0700, "karl mcgruber" skywagon
wrote:



"Jay Somerset"
You would have to taxi
for at least 50-100 yards to have a reliable track.

But yes, in theory, this would work.
--
Jay

No. 10 or 20 feet will be just fine.

No it won't. Watch a stationary GPS give you a position that wobbles
up to 20-50 feet away from its centroid. If you use a very short
track, you could be out way more than the allowable compass deviation.

Simple geometry -- work out the angular error with just a 10 foot
lateral error from a 20 foot base. (Hint: 30 degrees)
--
Jay (remove dashes for legal email address)