GGL vs. GGA in Terms of Fix Validity? (GPS)

The NMEA designer must decide which of the many available data fields shall be used in each sentence. Some are required, some optional, and some are proprietary.

No two are alike (in your case, GLL and GGA). All data I/O from is in ASCII format. There can only be one "talker" (but many listeners) on a NMEA serial bus.

The NMEA standards are not free. You must purchase them.

Wow! Really? NMEA is in ASCII? And I have to *decide* what to use? Really I have to think about it? Geewizz..... thanks so much! wow!

Hello Znago.

I suspect help with your homework will pretty much dry up around here.

@Doorman - if you are referring to my sarcastic reply to the totally irrelevant post then, well, sorry guys, I say thank you very very much when I am given help and try to give it when I can, but I expect at least some amount of relevancy and seriousness from those who post a reply (and in that case it was way, way off mark).

PS - It's not homework

Buy the friggin standard and read it like everyone else or keep quiet.

Your question was answered GGL and GGA are NOT THE SAME.

Producers of NMEA data (e.g. hardware manufacturers) are expected to purchase the spec but not consumers. Did you purchase a copy of the ASCII standard?

This provides an overview of why so many different message flavors

http://www.gpsinformation.org/dale/nmea.htm