Postprocess GPS

[JB]

I have a Trimble GPS device which all works fine, collecting accurate
GPS etc... Using the Trimble Pathfinder software (which I don't have)
it is possible to postprocess the GPS data to improve the accuracy
further. I would like to apply the post processing within my own CF2.0
application, but cannot seem to find information on the actual process
involved. Does anyone know where I can find informatioin on GPS
postprocessing?

 

[Gilles Kohl [MVP]]

JB,

I have a Trimble GPS device which all works fine, collecting accurate
GPS etc... Using the Trimble Pathfinder software (which I don't have)
it is possible to postprocess the GPS data to improve the accuracy
further. I would like to apply the post processing within my own CF2.0
application, but cannot seem to find information on the actual process
involved. Does anyone know where I can find informatioin on GPS
postprocessing?

Hmm, this questions is probably not very specific to the compact
framework, as it is mostly NMEA/RINEX and math AFAICT.

Reposting in e.g. will probably get more
competent answers

Regards,
Gilles.

 

[Gilles Kohl [MVP]]

On Thu, 29 Dec 2005 11:39:21 +0100, "Gilles Kohl [MVP]"

Upon rereading my own post ...

Reposting in e.g. will probably get more
competent answers

.... more competent answers than mine, I meant to say, ahem.

Regards,
Gilles.

 

[JB]

You're probably right, I will give it a try.

 

[Dick Grier]

The only way to "post-process" NMEA data is to apply a filtering algorithm
to reduce random variation in location, speed, course, and altitude. The
filtering details may be modified by the observed signal quality. The
signal quality information is available in the NMEA data stream (satellites
in view, and quality both might be used). I haven't heard of any
non-proprietary algorithms -- and I follow GPS developments to some degree.

Giles suggestion may yield some ideas, though.

Report back if you find anything interesting. I might consider adding it to
my DecodeGPS dll, which is free from my homepage.

Dick

--
Richard Grier (Microsoft Visual Basic MVP)

See www.hardandsoftware.net for contact information.

Author of Visual Basic Programmer's Guide to Serial Communications, 4th
Edition ISBN 1-890422-28-2 (391 pages) published July 2004. See
www.mabry.com/vbpgser4 to order.