GPS accuracy

Posted by Dara Shayda on December 28, 2011 at 12:56am

In mission planner I see the copter in our farm some 10 to 20 meters misplaced on google earth.

Is this a software issue or GPS accuracy.

Also it seems the orientation of the copter is off by good 30 degrees

D

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Replies

  • 3D Robotics
    Chris Anderson December 28, 2011 at 10:03am

    By "orientation" do you mean compass or attitude? If compass, see Randy's comment. If attitude, you need to calibrate the accels when the copter is level with the "level" command in the Mission Planner. It will also do this automatically at the field when you arm your ESCs.

  • DaveyWaveyBunsenBurner December 28, 2011 at 5:01am
    I found Google Earth itself was out in my area. The map overlay is not always 100%
  • Developer
    Randy December 28, 2011 at 4:57am

    If you leave it there for 10min (thus allowing it to get a good lock with a lot of satellites) does it still show it's off that much or does it move around the correct location?

     

    orientation = heading?  Have you set your declination?  Also is it always off by 30 degrees no matter which way you point it?  There's somethign called "magnetometer automatic offset nulling" in the code which will make the heading better after you've flown for a few minutes.

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