Mavic Air altitude drift

[Izzomagizzo]

I own the Mavic Air and use it recreationally sometimes. Every now and then I will take it out for a few good shots. When I’m out of range on the bottom altitude sensors the drone drifts! It starts by going up at 0.1 m/s then I think it compensates 0.2 m/s down. I get very worried as it can go up and down for as much as 1.5 meters and I can’t figure out why. I landed the bird and did some calibrations. Starting with the compass. I then flew it, same thing occurred. Then I calibrated the IMU. It fixed the problem, but I would like to know how to fix it or get information on why because calibrating the imu every flight is annoying and if there isn’t a flat surface, it doesn’t work. Any info or ideas on this, or any reports of it happening to anyone else. Thanks

 

[Cut.Aussie]

Have you made any physical changes to the body?
Once above a certain height it relies on the atmospheric sensor for altitude, this could be defective or has been subject excessive moisture ingress. Compass, GPS etc have no bearing on altitude

 

[Izzomagizzo]

My profile pic suggests what it looks like. No attachments added at all. I live with no internet so no interference. I can’t figure it out.

 

[Izzomagizzo]

One thing that it does say is ‘ calibrate the vision sensors in the DJI Assistant 2 ‘ surely it isn’t using those sensors at that height

 

[Sir Maxwell Greene]

Random question how old is the battery/ how many charges, is it bulging at all?

 

[Izzomagizzo]

Hey people, I figured out the reason. It is something to do with the imu. It will drift up and down if u don’t calibrate the imu. As soon as I do, the problem stops! Thanks all for helping me??