Re: [gpsd-users] Garmin 18X-5Hz

[Robin Schwab]

Am 11.08.2016 um 16:07 schrieb Miroslav Lichvar:
> gpsd supports detection of 5 Hz PPS, but there is a problem that it
> always sets the fractional part of the timestamp to zero, so with 5 Hz
> PPS the offsets have an error of 0.0, 0.2, 0.4, 0.6 and 0.8 seconds.

I solved the problem for me by setting the NEMA update rate to something 
clearly below 0.5 s. In my amateur understanding it's then always clear 
to which NEMA sentence the pps pulse belongs: the one that is closer. 
Then you get a good fix although there remains a sawtooth-like offset 
variation.

Regards

Robin