Im, sorry but this is BS. There is no such thing as a global magnetic model in the aircraft firmware.It has nothing to do with correcting magnetic to true heading, and rotating the aircraft gives it no information on declination anyway. It converts magnetic to true by adding the declination that it computes from a global magnetic model in the aircraft firmware.
Rotating the model allow it to get an accurate calibration to magnetic north with respect to the aircraft orientation and the anomalies of the Aircraft magnets in its motors.. Why do you think you need to rotate the model otherwise? In multiple axis?
Please provide some evidence of this fictitious magnetic model in the Aircraft.
You make too many assumptions, Sir.
So why does DJI make you recalibrate the compass if you travel > preset distance. (By the way that distance reflects the distance when the deviation becomes substantial.)
You persist in this fantasy and we have had this argument before. Enough for me to stop coming to this site.
I appreciate you knowledge on other subjects, particularly your diagnostic skills on reviewing flight logs. But please don't assume that you are an expert in everything. You don't know, what you don't know, and assumption is not a valid scientific process unless you can validate and prove that assumption with some facts. I did this before in our discussions and provided many reference sources. You to date have provided none.
Maybe I will come back to this site in a year or so.