Re: [Gpsbabel-misc] NMEA to GPX conversion omits RMC sentences?

[Robert L. <rob...@gp...>]

On Sun, May 2, 2010 at 2:38 PM, Vidar Gundersen
<vib...@gm...<vibrog%2Bg...@gm...>
> wrote:

> I've set up a GPS unit logging RMC at 1 sec, GGA at 5 sec, GSA at 60 sec.
>

That's odd.



> The following produces a file where RMC samples are dropped after the
> first GGA sample:
>
>    gpsbabel -t -i nmea -f nmea.txt -o gpx -F temp.gpx
>
> Forcing gpsbabel to ignore GGA gives a file with RMC samples:
>
>    gpsbabel -t -i nmea,gprmc=1,gpgga=0 -f nmea.txt -o gpx -F temp.gpx
>
> However, GSA sentence data are included at the appropriate samples.
>
>
> Is this behaviour a bug?
>

No, but it's not obvious, either.  From the source:

 * An input file may have both GGA and GLL and RMC sentences for the exact
 * same position fix. If we see a single GGA, start ignoring GLL's and
RMC's.
 *      GLL's will also be ignored if RMC's are found and GGA's not found.