SPIKE_151
lvl.4
Flight distance : 69767 ft
United States
Offline
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All compases rely on the strength of the earths magnetic field. You can calibrate the compass as many times as you like, but if a coronal mass ejection from the sun arrives at earth, you get a spike of charged particles hit the earths magnetic field and shock it, the earths magnetic field reverberates for a few seconds, and you get your compass error. The suns coronal mass ejections are linked to its 11 year sunspot cycle. So at the maximum sunspot activity in this cycle you will get these errors frequently. When sunspot activity is at its minimum, you will get few of these errors. Nasa runs a site where you can check sunspot activity and status and arrival times of coronal mass ejections.
http://www.swpc.noaa.gov/
Have a look at the linkThese mass ejections also affect radio waves at most frequencies, below is the link to the radio frequency disturbance prediction page.
http://www.swpc.noaa.gov/communities/radio-communications
A lot of lost comms , video , and RC signal as well as compass errors will be mostly due to these geo magnetic storms, when comms are lost in non built up areas, with no power lines or known strong magnetic sources. I know a lot of complaints are put on the forum for lost comms of one type or another, with DJI not being able to come up with a reason why. GMS ( geo magnetic storms ) are the likely culprit in nearly all cases.
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