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Re: [gpsd-dev] PQXFI NMEA, what is it?
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From: |
Gary E. Miller |
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Subject: |
Re: [gpsd-dev] PQXFI NMEA, what is it? |
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Date: |
Wed, 20 Jul 2016 15:40:27 -0700 |
Yo Juha!
On Wed, 20 Jul 2016 18:58:01 +0300
Juha Nurmela <address@hidden> wrote:
> Does anyone know what data is in the PQXFI "Qualcomm extended fix
> information" sentence ?
Hmm, I can't find anything with Google...
> $PQXFI,131021.4,6103.114292,N,02810.455606,E,102.3,2.83,2.00,0.03*65
> First there is time, lat, lon and MSL altitude, then the 3 unknowns.
> First 2 unknowns vary from about 250 down to about 2, 3rd one varies
> between about 5 and 0.03. All are bigger when sky is blocked, smaller
> when view is good. First ones could be uncertainties, in meters, but
> the 0.03 ?
Yeah, either DOPs or Error Estimates. Have you connected that to gpsd?
gpsd will compute the DOPs and Error Estimates, then you can see
which match.
> Convenient but brittle little gizmo. It want's to see "$GPS_START"
> and also reacts to "$GPS_STOP" but requires 5 seconds between those
> commands, or it misbehaves. Also, it must not be accessed until the
> 3G network is up, or both misbehave. And, if 3G net gets stuck,
> reconnect won't succeed until GPS device is closed.
Ouch... That one's gonna hurt.
RGDS
GARY
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Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
address@hidden Tel:+1 541 382 8588
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