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Re: [Paparazzi-devel] GPS precision

From: Tom Becker
Subject: Re: [Paparazzi-devel] GPS precision
Date: Tue, 04 Sep 2007 14:53:46 -0400
User-agent: Thunderbird (Windows/20070728)

> ... you need to determine the error induced by each satellite, and send THAT information to the airborne station.

That is exactly what a fixed DGPS ground station does. It determines the pseudorange errors from each visible vehicle and transmits those corrections to moving receivers. Surveyors and boaters use DGPS all the time, and SBAS is just another form of it, distributed by InmarSats instead of by LF beacons, broadcast FM subcarriers or Internet.


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