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

Thread Starter


Joined Sep 7, 2010
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?)