In article < XXXX@XXXXX.COM >,
True. Depending on the current processing load in the Garmin GPS-35, the
NMEA strings may be delayed for some time (I've seen it at least up to
Garmin's GPS-16 is supposed to be better at reducing this jitter. Probably
not that helpful to someone who already has a bunch of GPS-35s, huh?
We ended up having to "validate" the NMEA strings against the PPS to see
if we liked what we were seeing. If we saw NMEA strings that crossed over
the PPS, we threw away that second's data (ignored the NMEA strings for that
second). Plus we added code to see if what we got in the NMEA strings was
consistant with what we were expecting, and threw out what we didn't like.
The PPS itself was very stable, but the NMEA strings could not always be
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