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Re: [gpsd-users] Using a known location instead of WAAS/GLONASS/RTK/...
From: |
Eric S. Raymond |
Subject: |
Re: [gpsd-users] Using a known location instead of WAAS/GLONASS/RTK/... for corrections |
Date: |
Sun, 17 Aug 2014 17:39:39 -0400 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
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>