as we all know, wind drift is a problem when trying to get to our GPS coordinates. While in physics, for constant velocity drift, the equation is pretty easy, programming it to accomodate is a different story. while i haven't checked out, does the autopilot software being used by the geocrawlers adjust for that? Also, which is better to use to figure out the drift? An IMU is great, yes, but it isn't as accurate at predicting course errors. a gps has a 1sec refresh rate, but it atleast knows where you're going. which do you people use?