Egg shape - during compass calibration

Hi all,

There a weird issue going on during compass calibration: on Mission Planner it draws out an egg, a quite long one. This happens even when i try far out on the field or in the house with the fc and gps/compass is on the table.

I know how it sounds at first, because the earth also not perfect globe, but not this much i believe :slight_smile:
What i can’t understand at, all that this should be already a replacement set. The original was replaced because this issue well besides others.

What can cause it? Which logs should i check?
Thoughts and suggestions welcome!

Humm, I’m watching. I had a similar thing happen not long ago. :question:

your compass has some form of magnetic interference that is to close. could be a lump of metal, or other metallic object