What is HDOP and VDOP?

Discussion in 'General GPS' started by Anonymous, Sep 20, 2003.

  1. Anonymous

    Anonymous Guest

    I have some GPS software that indicates HDOP, VDOP, and PDOP. Does anybody know what is the significance of these parameters?
     
    Anonymous, Sep 20, 2003
    #1
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  2. Anonymous

    Sam Wormley Guest

    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/gcraft/notes/gps/gps.html#Gdop
    http://www.mercat.com/QUEST/gpstutor.htm

    http://www.google.com/search?q=HDOP+GPS+Glossary
    http://www.google.com/search?q=VDOP+GPS+Glossary
     
    Sam Wormley, Sep 20, 2003
    #2
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  3. Anonymous

    Dave Patton Guest

    (Anonymous) wrote in
    news::

    > 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
     
    Dave Patton, Sep 20, 2003
    #3
  4. Anonymous

    Sam Wormley Guest

    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/gcraft/notes/gps/gps.html#Gdop
    > http://www.mercat.com/QUEST/gpstutor.htm
    >
    > http://www.google.com/search?q=HDOP+GPS+Glossary
    > http://www.google.com/search?q=VDOP+GPS+Glossary



    DOP, the non-technical description
    http://gpsinformation.net/main/dopnontech.htm
     
    Sam Wormley, Sep 20, 2003
    #4
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