Welcome to PhantomPilots.com

Sign up for a weekly email of the latest drone news & information

Erratic GPS Mode

Discussion in 'Pro/Adv Discussion' started by mikeve, Feb 28, 2016.

  1. mikeve

    Joined:
    Apr 17, 2014
    Messages:
    116
    Likes Received:
    6
    Location:
    Merrickville, ON Canada
    Hi Gang

    Tried to fly this afternoon. A bit windy. Anyway, got to hover at about 3 m and it starts to drift erratically. I try to land but had too much drift (my fault). Broken prop only damage (phew).

    Uploaded the log to HD -

    HealthyDrones.com - Innovative flight data analysis that matters

    and you can see that I never had less than 10 GPS sats, but the mode kept flipping back and forth between GPS and ATTI.

    Any bright ideas, please?
     
  2. Tdeath

    Joined:
    Aug 28, 2015
    Messages:
    38
    Likes Received:
    6
    Atti mode will kick in whenever there is low gps count or when your compass get interference ( which is usually the case ).

    In my experience, when i fly in an area with strong interfernce (litchi will pop a message sayin compass calibration within seconds) and usually stay in gps mode
    However the go app will not warn me until it switched to atti mode
     
  3. mikeve

    Joined:
    Apr 17, 2014
    Messages:
    116
    Likes Received:
    6
    Location:
    Merrickville, ON Canada
    Thanks Tdeath. It must have been interference because 10 sats (the minimum that I had) is rated as "Good" by HD, correct?
     
  4. Trackman1

    Joined:
    Jan 1, 2016
    Messages:
    838
    Likes Received:
    212
    Location:
    Ontario, Canada
    Mine did the same thing. Took off and it was not holding position. It was windy. I just kept it away from trees.
    After what was probably only 30 seconds it held position. I don't think it had a good lock on the sats at first.
    I was in GPS mode all the time.
     
  5. Trackman1

    Joined:
    Jan 1, 2016
    Messages:
    838
    Likes Received:
    212
    Location:
    Ontario, Canada
    Mike. Just noticed. We are not far apart.
     
  6. Tdeath

    Joined:
    Aug 28, 2015
    Messages:
    38
    Likes Received:
    6
    Also from my experience, compass will go crazy if u take off from certain areas of ur home so learn them.

    My advice whenever u get compass error or atti mode and the ac starts drifting at low altittude ? Shoot it up sky high and simply account for wind direction from the way its drifitng ( you can do this using los or the map in go app) keep flying till u gps mode back or simply try to land it in a different open area.
     
  7. mikeve

    Joined:
    Apr 17, 2014
    Messages:
    116
    Likes Received:
    6
    Location:
    Merrickville, ON Canada
    Tdeath: many thanks. Went back out, did a compass calibration and all was good.
     
  8. mikeve

    Joined:
    Apr 17, 2014
    Messages:
    116
    Likes Received:
    6
    Location:
    Merrickville, ON Canada
    Sent you a PM