Re: gpsd ignores Galileo satellites

[Gary E. Miller]

Yo Filip!

On Mon, 30 Nov 2020 14:33:45 +0100
Filip Jan Kubicz <filip.kubicz@tier.app> wrote:

> Thanks for the suggestion. I have tested with gpsd v3.21 release and
> with latest git master: 3.21.1~dev (revision
> release-3.21-639-g46f369f42). The result is unfortunately similar -
> $GAGSV on input, but no Galileo satellites in gpsd JSON output.

Ouch.  So yet another Quectel Quirk.

> I have gathered the gpspipe -R output, it is attached, for 3.21 and
> 3.21.1-dev.

Oh, my.  That is interesting:

$PGLOR,2,SAT,4,1,G02,018,0,G05,035,C,G07,024,C,G09,044,C,G28,045,C,G30,037,C*48
$PGLOR,2,SAT,4,2,G09,044,C,G30,036,C,R10,047,C,R09,027,C,R07,041,C,B19,040,8*50
$PGLOR,2,SAT,4,3,E02,047,C,E03,041,C,E30,038,C,E02,038,C,E03,042,C,E30,034,C*32
$PGLOR,2,SAT,4,4,N06,035,8*58
$PGLOR,0,SPD,0,301120,130055.00,s,0.00,l,0.00,c,0.00,D,0,56.5*22
$PGLOR,1,FIX,1.0,1.0*20
$PGLOR,6,STA,130055.00,0.000,0.000,0,1,4,0,P,D,L,0,C,0,S,0000,56,5,R,0000,tpef,0,1229118,LC,,*17
$PGLOR,4,PWR,mA,40.1,RFTm,1002,OscTm,1002,MeasTm,1002,UTC,130055.00,GNSSmA,40.1,CPUTm,452,COPTm,76,SrchTm,713,TrkTm,475,RpcTm,116*09
$PGLOR,1,LSQ,130055.00,,,,,,,,,,,,,,,,00,,*39

There is no NMEA message $PGLOR, and gpsd has no support for $PGLOR messages.
I can not find any documentation on those.  We have never found any doc
on Quectel output.

Not much we can do for you with no doc.

As for the $xxGSV, you get this:

$GPGSV,3,1,08,02,03,238,19,05,55,270,34,07,,,12,09,24,109,44*47
$GPGSV,3,2,08,28,26,167,44,30,87,155,39*79
$GPGSV,3,3,08,09,,,44,30,,,37,8*6B
$GLGSV,1,1,03,74,59,202,48,73,63,051,27,71,57,134,43*50
$BDGSV,1,1,01,219,33,151,41*63
$GAGSV,2,1,06,102,56,160,47,103,45,122,42,130,14,197,39*6F
$GAGSV,2,2,06,102,,,38,103,,,43,130,,,35,1*4A

So GPS, BeiDou, and Galileo.  This is weird:

$GAGSV,2,2,06,102,,,38,103,,,43,130,,,35,1*4A

PRN 102?  For Galileo?  WTF?  Just impossible.

It should be an integer from 1 to 36.  Some broken systems might use 301
to 336.  But 102?

I can not find any documentation on that.  We have never found any doc
on Quectel output.

Find us some Quectel doc and it is probably easy to fix.  But not much
we can do for you with no doc.

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        gem@rellim.com  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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