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Kerry
22-09-2001, 05:50 AM
While I'm at it this may interest some ???, some it may not :-X. It was written for other reasons and really doesn't apply in practice to most boating applications but has to to with averaging positions with and now without Selective Availability.

http://www.cqnet.com.au/~user/aitken/gps/gps_avg.htm

The following link is an extension of the above link especially regards obstructions like trees, buildings (as this case was based on) etc

http://www.cqnet.com.au/~user/aitken/gps/gps_obs.htm

Cheers, Kerry.