Re: Differential GPS

Sam Wormley wrote...
For most, beacon DGPS and WAAS accuracy is likely to be essentially the
same

Not if you can't see the sodding geostationary satellite! When the SBAS
satellite has an altitude of only about 30 degrees and a receiver rejects
differential corrections just a few seconds following signal loss then
under realistic conditions of terrestrial use I would suggest that SBAS
will be totally useless for the majority of the time.

I have not found that to be the case from 42N 93W.

Looks a bit flat around your parts. Rather more topography around 52N 2W -
not to mention 10 degrees further north. Not really worth leaving "WAAS"
enabled - even when there is a decent EGNOS signal.

David


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