GGL vs. GGA in terms of fix validity? (GPS)

Discussion in 'Embedded Systems and Microcontrollers' started by slowfuse, Sep 8, 2010.

  1. slowfuse

    Thread Starter New Member

    Sep 7, 2010
    16
    0
    Hi. I am interested in Lat/Long position data (and time) and both GGA and GLL messages provide this (NMEA messages in GPS, that is).

    My question is, which one to use?

    In terms of additional information about validity of the fix, both are different information:

    GGA - has Position Fix Indicator, Satellites Used, and HDOP

    GLL - has Status

    Is it enough to look at the GLL Status and see if it is valid or invalid? Or is it more proper to look at the extended parameters available in GGA? (is Position Fix Indicator in GGA the same as Status in GLL?)

    Thanks
     
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