Bad GPS Pos / high HDOP

Posted by Philipp Walker on June 12, 2014 at 1:46pm

I have a hard time getting a good HDOP and enough satellites with my 2013 3DR Y6 (APM 2.6 with ArduCopter 3.1.5, uBlox GPS).

HDOP hardly gets below 2 point something even if it can see 6 sats.

Though I live in an area surrounded by quite some mountains, my Android phone (Nexus 4), lying just beside my Y6, usually sees 1 or two sats more than APM and shows a HDOP around or below 1 with the GPS Status & Toolbox app.

Do I need a need a new GPS or a GPS mast?

Kind regards,

Philipp

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Replies

  • JoeT June 13, 2014 at 1:32am

    Oops. I made a mistake. I'm running ArduCopter v3.1.2

  • Mark Böhm June 13, 2014 at 1:10am

    Same here. The problem became most obvious to us when we updated to V3.1.5. At somepoint we were not able to arm the copter. Disabling geofence helped but is not what we want.

    Can anybody confirm that the same GPS hardware worked better while still at older firmware versions?

    Mark

  • JoeT June 12, 2014 at 3:06pm

    Funny you posted this Phillip. I was going to post the same thing last night.

    I too am having a hard time getting the HDOP down below 2. It will, after a bit, settle down
    to around 1.7 but jumps around. Sometimes up to 2.7. That is with a lock on 10 to 11 satellites.
    I tried swapping out the gps but with the same results.

    Any insight as to what may be the problem would be greatly appreciated.

    Thanks,
    Joe

    ArduCopter v3.1.5
    3DR uBlox GPS with Compass (on a mast about 2” above props)

  • Julien Dubois June 12, 2014 at 2:35pm
    Hi, you should get a new M8 GPS module from csgshop. Results seem great compared to basic 6 series GPS.
    • Mark Böhm > Julien Dubois June 13, 2014 at 1:12am

      Hi Julien,

      could you please include a link to that M8 GPS?

      Mark

This reply was deleted.