On Mon, Mar 10, 2008 at 12:13 AM, Ampere K. <[EMAIL PROTECTED]> wrote:
> Here might be a possible way for you to remove those jumps. You will need
> two
> sets of observations. One on the plane of course, and one from the
> ground.
> For the one on the ground, you will also need to know the precise
> coordinates
> of the receiver beforehand.
>
> The two receivers will experience jumps in their observations
> simultaneously.
> Subracting the data from the ground receiver by its precise coordinates
> will
> give you the jumps, which you can use to subtract the errors from the
> observation of the plane.
I'm not a gps guy, but I think differential gps systems work based on the
phase of the signal and the stations select a common set of satellites for
their solution. We actually have a person a the UofMN working on a project
where the two ends can be mobile and the system computes the relative
distance between the two mobile station ... so you could plunk one end down
at the end of your temporary runway for doing virtual ILS/precision
landings. But that still doesn't fully resolve that the real world ground
elevation may not match exactly the elevation in FlightGear so there will
always be some kind of discrepancy when rendering real flight data in a
simulator ... especially when taxiing or touching down.
Regards,
Curt.
--
Curtis Olson: http://baron.flightgear.org/~curt/
-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2008.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
_______________________________________________
Flightgear-devel mailing list
Flightgear-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/flightgear-devel
