bugGPSD - Bugs: bug #42407, wrong interpretation of NMEA...

 
 

bug #42407: wrong interpretation of NMEA messages for mixed GPS/GLONASS recievers

Submitted by:  None
Submitted on:  Fri 23 May 2014 01:12:51 PM UTC  
 
Category: NoneSeverity: 3 - Normal
Item Group: NoneStatus: Fixed
Privacy: PublicAssigned to: Eric S. Raymond <esr>
Open/Closed: Closed

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Tue 30 Aug 2016 12:02:11 PM UTC, comment #6:

Hmm, it detects used satellites incorrectly. gpsd should join consequent GNGSA entries, but it takes the last one and shows that only GLONASS satellites are used.

Alexander <aavolkov>
Mon 01 Sep 2014 09:28:22 AM UTC, comment #5:

Awesome! Thank you.

Alexander <aavolkov>
Tue 26 Aug 2014 08:54:09 AM UTC, comment #4:

Fixed in git head.

This wasn't actually a client-side problem; gpsd needed to merge the GNSS skyiew with the GLONASS one and emit only one SKY report, which it now does.

Eric S. Raymond <esr>
Project AdministratorIn charge of this item.
Mon 25 Aug 2014 12:09:54 PM UTC, comment #3:

Now that I see a log file and may be able to reproduce it, I'll reopen and clear the Need Info status.

Eric S. Raymond <esr>
Project AdministratorIn charge of this item.
Mon 25 Aug 2014 09:59:30 AM UTC, comment #2:

This bug is still reproducible. Why have you closed it?

Alexander <aavolkov>
Fri 23 May 2014 05:21:57 PM UTC, comment #1:

This diagnosis seems unlikely. We have some devs who are GLONASS users.

To troubleshoot this I need a capture file from the GPS including both GNSS and GLONASS sentences.

Eric S. Raymond <esr>
Project AdministratorIn charge of this item.
Fri 23 May 2014 01:12:51 PM UTC, original submission:

I have BU-353 GLONASS. When I run xgps, it doesn't show me satellites of both systems simultaneously. Instead it shows only satellites for one system and periodically blinks for another one.

I guess that issue is in nmea_update(). This function should cache information from each navigation system and produce joined result.

Anonymous

 

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Attach File(s):
   
   
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Attached Files
file #31442:  gps.log added by aavolkov (14KiB - text/x-log - attached GPS/GLONASS capture file (gps.log))

 

Depends on the following items: None found

Items that depend on this one: None found

 

Carbon-Copy List
  • -unavailable- added by aavolkov (Updated the item)
  • -unavailable- added by esr (Posted a comment)
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    Follow 8 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Sun 22 Feb 2015 05:05:06 PM UTCesrOpen/ClosedOpen=>Closed
    Tue 26 Aug 2014 08:54:09 AM UTCesrStatusNone=>Fixed
      Assigned toNone=>esr
    Mon 25 Aug 2014 12:09:54 PM UTCesrStatusNeed Info=>None
      Open/ClosedClosed=>Open
    Sat 23 Aug 2014 05:48:27 PM UTCesrOpen/ClosedOpen=>Closed
    Mon 26 May 2014 08:37:18 AM UTCaavolkovAttached File-=>Added gps.log, #31442
    Fri 23 May 2014 05:21:57 PM UTCesrStatusNone=>Need Info

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