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Re: [gpsd-users] Garmin 18X LVC and upcoming week rollover
From: |
Gary E. Miller |
Subject: |
Re: [gpsd-users] Garmin 18X LVC and upcoming week rollover |
Date: |
Wed, 4 Dec 2019 16:59:11 -0800 |
Yo Rich!
On Wed, 4 Dec 2019 16:27:25 -0800
Rich Wales <address@hidden> wrote:
> See below for the output from "./gpspipe -R -x 15" (taking care to use
> the "gpspipe" from my latest build).
Common mistake. Newer clints complaint about verson mismatches.
> I did "./gpsctl -b" about 20 minutes before logging this data.
Sadly you are still in NMEA mode:
> {"class":"DEVICES","devices":[{"class":"DEVICE","path":"/dev/gps0","driver":"NMEA0183"
Sometimes you have to repeat gpsdctl -b, without restarting gpsd, to get
into binary mode.
> $GPRMC,002034,A,3728.0473,N,12212.4437,W,000.0,326.8,200400,015.0,E,D*0C
200400 is 20 April 2000. Not good.
> $GPGGA,002034,3728.0473,N,12212.4437,W,2,08,1.1,20.9,M,-32.4,M,,*45
> $GPGSA,A,3,03,07,08,09,16,23,27,30,,,,,1.9,1.1,1.5*3B
> $GPGSV,3,1,09,03,17,175,23,07,54,285,40,08,18,126,29,09,80,010,36*72
> $GPGSV,3,2,09,16,28,044,37,23,62,107,40,27,21,090,25,30,24,264,26*76
> $GPGSV,3,3,09,05,03,326,00*41
> $PGRME,3.3,M,7.2,M,7.9,M*25
Pretty much GPRMC, GPGGA, GPGSA and PGRME only. None have leap seconds.
If you had a sentence with the leap second, then gpsd would look at the
18 current leap seconds and could fix the GPS epoch.
The Garmin $PGRMF reports leap seconds.
Also the Garmin packet 51 (Pid_Pvt_Data) contains the leap second.
With one of those, gpsd can disambiguate the GPS epoch.
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
address@hidden Tel:+1 541 382 8588
Veritas liberabit vos. -- Quid est veritas?
"If you can't measure it, you can't improve it." - Lord Kelvin
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- Re: [gpsd-users] Garmin 18X LVC and upcoming week rollover, (continued)
- Re: [gpsd-users] Garmin 18X LVC and upcoming week rollover, Gary E. Miller, 2019/12/02
- Re: [gpsd-users] Garmin 18X LVC and upcoming week rollover, Rich Wales, 2019/12/02
- Re: [gpsd-users] Garmin 18X LVC and upcoming week rollover, Charles Curley, 2019/12/02
- Re: [gpsd-users] Garmin 18X LVC and upcoming week rollover, Rich Wales, 2019/12/03
- Re: [gpsd-users] Garmin 18X LVC and upcoming week rollover, Gary E. Miller, 2019/12/03
- Re: [gpsd-users] Garmin 18X LVC and upcoming week rollover, Rich Wales, 2019/12/04
- Re: [gpsd-users] Garmin 18X LVC and upcoming week rollover, Gary E. Miller, 2019/12/04
- Re: [gpsd-users] Garmin 18X LVC and upcoming week rollover, Rich Wales, 2019/12/04
- Re: [gpsd-users] Garmin 18X LVC and upcoming week rollover,
Gary E. Miller <=
- Re: [gpsd-users] Garmin 18X LVC and upcoming week rollover, Rich Wales, 2019/12/05
- Re: [gpsd-users] Garmin 18X LVC and upcoming week rollover, Gary E. Miller, 2019/12/05
- Re: [gpsd-users] Garmin 18X LVC and upcoming week rollover, Rich Wales, 2019/12/05
- Re: [gpsd-users] Garmin 18X LVC and upcoming week rollover, Gary E. Miller, 2019/12/05
- Re: [gpsd-users] Garmin 18X LVC and upcoming week rollover, Miroslav Lichvar, 2019/12/10
Re: [gpsd-users] Garmin 18X LVC and upcoming week rollover, Steve Bourland, 2019/12/04