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What is HDOP and VDOP?

 
 
Anonymous
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      09-19-2003, 11:08 PM
I have some GPS software that indicates HDOP, VDOP, and PDOP. Does anybody know what is the significance of these parameters?

 
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Sam Wormley
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      09-19-2003, 11:22 PM
Anonymous wrote:
>
> I have some GPS software that indicates HDOP, VDOP, and PDOP. Does anybody know what is the significance of these parameters?


The dilution of precision (DOP) is an indication of the quality of
the results that can be expected from a GPS point position. It is
a measure based solely on the geometry of the satellites and therefore
can be computed without any pseudorange observations being recorded.

DOP values are often expressed in different terms relating to the
propagation of the satellite configuration into the position fix in
its different components.

Ref: http://www.colorado.edu/geography/gc.../gps.html#Gdop
http://www.mercat.com/QUEST/gpstutor.htm

http://www.google.com/search?q=HDOP+GPS%2BGlossary
http://www.google.com/search?q=VDOP+GPS%2BGlossary
 
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Dave Patton
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      09-19-2003, 11:31 PM
http://www.gps-forums.net/(E-Mail Removed) (Anonymous) wrote in
news:(E-Mail Removed):

> I have some GPS software that indicates HDOP, VDOP, and PDOP. Does
> anybody know what is the significance of these parameters?
>


Anthony - there is no need to post the same question three
times in three minutes! (using two different "names")

Sam has already provided an answer for you.
For some GPS-related 'Canadian content' you could take
a look at my website, and there are some links on the
GPS page to Dale's manual, and some Garmin manuals,
which might help with general understaning of GPS.

--
Dave Patton
Canadian Coordinator, the Degree Confluence Project
http://www.confluence.org dpatton at confluence dot org
My website: http://members.shaw.ca/davepatton/
Vancouver/Whistler - host of the 2010 Winter Olympics
 
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Sam Wormley
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      09-20-2003, 07:57 AM
Sam Wormley wrote:
>
> Anonymous wrote:
> >
> > I have some GPS software that indicates HDOP, VDOP, and PDOP. Does anybody know what is the significance of these parameters?

>
> The dilution of precision (DOP) is an indication of the quality of
> the results that can be expected from a GPS point position. It is
> a measure based solely on the geometry of the satellites and therefore
> can be computed without any pseudorange observations being recorded.
>
> DOP values are often expressed in different terms relating to the
> propagation of the satellite configuration into the position fix in
> its different components.
>
> Ref: http://www.colorado.edu/geography/gc.../gps.html#Gdop
> http://www.mercat.com/QUEST/gpstutor.htm
>
> http://www.google.com/search?q=HDOP+GPS%2BGlossary
> http://www.google.com/search?q=VDOP+GPS%2BGlossary



DOP, the non-technical description
http://gpsinformation.net/main/dopnontech.htm
 
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