Re: [Paparazzi-devel] GPS precision

[Tom Becker]

> ... 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.


Tom