Re: [gpsd-users] Using a known location instead of WAAS/GLONASS/RTK/... for corrections

[Eric S. Raymond]

Jobs, Steve <address@hidden>:
> Is it possible to pass a know location to gpsd and have it use that
> for error correction?  I may be asking this question wrong so allow
> me setup the scenario.  I have two matching receivers, in this case
> LS20031, one of which will be a base station and the other will be
> on a rover.  Both will be running their own instances of gpsd.  The
> rover will never travel more that 400 feet from the base station so
> they should almost always be sharing the same satellites.  If I
> place the base station at a known location can I just find the
> difference between the signal and the known location and pass that
> to the rover as the correction? Or even better would be to have the
> base gpsd take the known position and then the rover could query the
> base gpsd for the correction and apply it to the signal it has
> received from its own gps receiver.
> 
> Steve

This can't be done in GPSD as it is.

It sounds like what you actually want is differentaial GPS error correction 
using a DGPS transmitter at your base station.
-- 
                <a href="http://www.catb.org/~esr/";>Eric S. Raymond</a>