Dennis Hilberg, Jr. wrote: [] > I was actually referring to the time emitted in the NMEA data (GPS > time), not the PPS signal. Sorry, I should have specified that. The > PPS is accurate to a microsecond, but not the GPS time. I happen to > use a fudge factor of 0.190 to get the GPS time close to zero, but > the PPS is of course very accurate and doesn't require any fudging. > > He's not using the GPS_NMEA (type 20) driver, so he has to deal with > the PPS and GPS time seperately, hence SHM(0) and SHM(1). The type > 20 driver uses both the PPS (if the OS supports it) and GPS time, but > the offset you see in 'ntpq -p' is the PPS offset.
Thanks for that clarification, Dennis. I appreciate what you mean by the GPS time. David _______________________________________________ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
