Re: BUG: ubxtool enable/disable RAWX fails

[John Ackermann N8UR]

Here's the MON-VER output from the M8P I have:

jra@lintty:~$ ubxtool -p MON-VER
ubxtool: poll MON-VER

sent:
UBX-MON-VER:
  Poll request

UBX-MON-VER:
  swVersion EXT CORE 3.01 (db0c89)
  hwVersion 00080000
  extension ROM BASE 3.01 (107888)
  extension FWVER=HPG 1.40REF
  extension PROTVER=20.30
  extension MOD=NEO-M8P-2
  extension FIS=0xEF4015 (100111)
  extension GPS;GLO;BDS
  extension QZSS

Galileo was turned off because I was, again, following the instructions
for gpsrinex; since I was using an 8-series receiver I assumed they
would be accurate.  I'm trying to do things by the book to avoid
introducing errors of my own.

John
----

On 4/28/20 5:07 PM, Gary E. Miller wrote:
> Yo John!
> 
> On Tue, 28 Apr 2020 16:12:30 -0400
> John Ackermann N8UR <address@hidden> wrote:
> 
>> Gary, you're not reading carefully enough.  Both the ubxtool -P issue,
>> and the bad RINEX files, occur when I am using a *NEO-M8P* as well as
>> a ZED-F9P.  So the problem is with the 8 series as well, or at least
>> maybe more recent 8 series (though this unit is about 9 months old)
>> if they updated the protocol from earlier versions.
> 
> There are two version of the 8P.  One does RTCM2, and one does RTCM3.
> I suspect the RTCM3 is a backport of the 9 code.
> 
> We know the RTCM2 version works.  I have used it many times.
> 
>> To be sure, I just unplugged the F9P entirely.  I used uCenter to
>> reset the *NEO-M8P* to factory default, then plugged it back in to
>> the Linux box.
> 
> I do not trust u-center.
> 
>> I then followed the instructions in the gpsrinex page.  It appears
>> that some messages, such as turning off NMEA and maybe disabling the
>> non-GPS constellations, worked.
> 
> Easy to tell with ubxtool.
> 
>> But issuing ubxtool -e RAWX did not cause RAWX messages to be emitted.
> 
> Works for me.
> 
>> Doing ubxtool -p MON-VER reports the version to be 20.30.  When I did:
>>
>> ubxtool -P 20.30 -e RAWX
>>
>> I started getting RAWX output.
>>
>> THIS IS ON A SERIES 8 RECEIVER.
> 
> better to let MON-VER do the talking.  All filters are lossy.
> 
>> Running
>> ubxtool -p CONFIG -v 2 -P xx
>> ubxtool -p STATUS -v 2 -P xx
>>
>> failed with a floating point conversion error.
> 
> Duh.  xx is not a floating point number!
> 
>> Plugging in "20.30"
>> for xx, I got the results shown in the two attached log files.
> 
> That would be correct.  If you have better text for the doc, send it.
> 
> Your GLONASS is off, shold be on:
> 
> UBX-CFG-GNSS:
>  msgVer 0  numTrkChHw 28 numTrkChUse 28 numConfigBlocks 4
>   gnssId 0 TrkCh  8 maxTrCh 16 reserved 0 Flags x01010001
>    GPS L1C/A enabled
>   gnssId 3 TrkCh  2 maxTrCh 16 reserved 0 Flags x01010000
>    BeiDou B1I 
>   gnssId 5 TrkCh  0 maxTrCh  3 reserved 0 Flags x01010001
>    QZSS L1C/A enabled
>   gnssId 6 TrkCh  8 maxTrCh 14 reserved 0 Flags x01010000
>    GLONASS L1 
> 
> Yes, it is tricky to do.  But the examples do work.
> 
> UBX-CFG-NAV5:
>  mask 0xffff dynModel 0 fixmode 3 fixedAlt 0 FixedAltVar 10000
> 
> Not sure how much it matters to the RZWX, but dynModel 1 would be better.
> 
> Your RAWX is working, but w/o the GLONASS:
> 
> UBX-RXM-RAWX:
>  rcvTow 245122.993 week 2103 leapS 18 numMeas 10 recStat 0x1 version 1
>  reserved1[2] 0xdf 0x3b
>   recStat (leapSec)
>   prmes 18334623.271 cpMes 96349066.305 doMes 71.112305
>    gnssId 0 svId 28 sigId 0 freqId 0 locktime 64500 cno 49
>    prStdev 5 cpStdev 1 doStdev 8 trkStat 15
> [...]
> 
> 
> And here is the big one:
> 
> Note the rcvTow:  245122.993.  NRCan wants measurements on the top of
> the second.  So this will not work with NRCan.  This has been known
> for a while.  No known workaround.
> 
> All good RINEX files we have tested have rcvTow very close to the top
> of the second.  This have been much discussed recently here.
> 
> 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
>