Discussions

ublox vs MediaTek

Posted by chris g on April 14, 2011 at 11:03am
Tried the GPS hold in my quad today, and it looks to be working. It will hover within about a 10-15 ft space horizontally and about 6-8 ft vertically.

Will the ublox module provide better accuracy or is a matter of the rate at which the APM is sampling and reacting to the GPS?

It looks like the microtek MediaTek gps typically takes 2-3 minutes to get a gps lock, which is about what it takes my garmin (car gps) from a cold boot, so I guess that is normal.

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Replies

  • Developer
    Jani Hirvinen April 15, 2011 at 7:58am

    Well to have 10-15ft hor/6-8ft vert is rather good already due general GPS accuracy is about 15ft. And like Sebastian said too, MTEK is better for Quad use due it's antenna. It is a bit difficult to install uBlox with helix antenna. Helix antennas has rahter small field of view.

     

    Accuracy also highly depends on what software you are using.

     

  • 3D Robotics
    Chris Anderson April 14, 2011 at 1:18pm
    By microtek, I assume you mean MediaTek. 2-3 minutes is longer than average, but that depends on where you are and atmospheric conditions, etc.
  • Sebastian Gralla April 14, 2011 at 1:03pm

    mediatek has better accuracy AND higher sampling rate

     

    tune your PIDs to get a better GPS hold

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