In a message dated 96-04-10 17:49:32 EDT, you write:

Or course, I could be completely missing some neat feature of DGPS. I really don't know the details of how it works and this could be completely wrong. Any thoughts?

Because of the fluctuations in the signals, random and otherwise, you would be detected if you used recordings that were more than a few seconds old. However, if you delayed all but one of the satellite signals by a few milliseconds (or fractions thereof) to get the desired phase relationship, you could effectively fake your position, and the delay would be masked by the delays inherent in the Net by a pretty good margin. The longer the average packet transfer delay between you and the other party, the farther you could fake your position from your real one without being detected. Jonathan Wienke