: Dale, while I believe that the newspaper wrote this, its hard to believe its
: actually true.....my docomentation says that the DGPS is good to within 5
: meters.....which is 5 thousand mm. If I knew of some way to check this
: out, I'd do it..just curious as to how accurate it really is. Regards...

If they are talking in the article about "ground" stations, I suspect they are using equipment that is fixed in one place. Sounds a bit like the stuff that geologists use to occasionally report that the San Andreas fault has dropped 1/10th of an inch in the last decade, or that Mt. Everest is growing at a rate of a couple millimeters each year. The idea that such fixed devices would average their readings over a long period of time, and use data from different sattelites as they overflew sounds like a rational explanation for this. I'm certainly happy with the number crunching that my little handheld GPS can do!

PGJ