[IMU]heading exception (In Flight)

[Grimbart55]

Anybody got this message? What does it mean? The full message on Healthy Drones reads:

"Warning:[IMU]heading exception (In Flight) please switch to atti mode if craft behave abnormally"

Was flying in cold weather (-10C) at a very high geographical latitude (Northernmost Finland, 69.37N). Not sure if this is an issue.

 

[Blizzer3]

I got it to, and here it's sunny, not much wind at all and I'm in the south west of Sweden

 

[Aringa]

Got two times in two flight. Sunny and great GPS... oh-ho

 

[vetleaghusby]

I got the warning in 10- degrees as well. think it has something to do with that the GPS doesn't work so well in the cold weather...

 

[Spy_Corfu]

got it also with nice warm weather full satellite coverage and it started drifting had to switch to sport mode to re-take control of the mavic.

Multiple drones flying around at the same time so maybe that was an issue?

 

[vetleaghusby]

It may be the location

 

[Spy_Corfu]

what do you mean? like the Bermuda triangle?

 

[BorisTheSpider]

The high latitude would matter if this was an IRS during alignment but I thought the IMUs were being used in a much simpler way just as an attitude reference.

My guess is, you would benefit from doing an IMU calibration with a cold drone that has been off for a while so everything can get nice and cold then when it's turned on do the calibration as quickly as practical.

The IMUs need to be within a certain temperature range for the calibration data to be valid, so doing it when it's cold may improve things.

 

[vetleaghusby]

Haha nope like strong magnet or things like that