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Re: RINEX file unable to be processed


From: Gary E. Miller
Subject: Re: RINEX file unable to be processed
Date: Mon, 27 Jul 2020 12:23:55 -0700

Yo David!

On Mon, 27 Jul 2020 09:39:52 +0100
"David J Taylor" <gm8arv@yahoo.co.uk> wrote:
>> That usually means you forgot to start the gpsd daemon a
>> 192.168.0.123 with the "-G" option.  Without "-G" then gpsd only
>> listens on localhost.
> 
> Thanks, Gary.  I made the change (on the remote RPi) and restarted
> the service, but it still didn't work.

Debug it this way, as root:
        # pstree -paul | fgrep gpsd
        # netstat -apn | fgrep 2947

Also, if you are still running gpsd under systemd(enier) then there
is more to do, as outlined here:

    https://gpsd.io/troubleshooting.html#systemdtroubleshooting

> Sorry you had problems downloading, but I see they are now resolved.
> I hope you can check whether the RAWX file is correct.

I'm not sure what "correct" means in this context.  It does appear to be
a valid ub-blox binary stream.  And it has UBX-RXM-RAWX:messages
in it.  I viewed it this way:
        ubxtool -f 4h-raw.ubx

I used the procedure on the gpsrinex mane page to crerate a RINEX file and
sent it to NRCAN.  They promptly processed the file and returned this
result: 
http://webapp.geod.nrcan.gc.ca/CSRS-PPP/service/results/file?id=kgpJ1V-bYWFcvysIv95Wgyr3hFFRlL4oT6O5m_C4QhE&lang=en&fid=000&type=full

lat/lon under 3m Sigmas(95%), alt under 5m Sigma(95%)

So it looks like current gpsrinex is working fine.  Looks like you just
need to update your gpsd.

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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