Hi,
A few months ago I lost my spark in an infamous "battery dropping" accident, after more than 80 flights, so I bought a new one.
A feel like this one has some more issues (had to calibrate compass, never happened before, and some issues witht the gimbal with filters, that I did not have before), one of them happened after 10-20 flights, as the VPS starts giving weird readings, and even went auto landing (I saw the readings going crazy on the screen, changing from 100meters to 5 meters then back and forth).
You can see it in this flight à  7m55 : http://www.phantomhelp.com/LogViewer/EARDA3ZY9MK29TJPUI8H/ , thankfully I had enough battery to land it slowly, but it should not have started. There were no fog, nothing, everything was clean, and I was under the clouds
So I redid a small test to check:  http://www.phantomhelp.com/LogViewer/NXIZKQQLJ9CPJGBC46Z3/ and you can see at 9m35, the readings are way off (I saw the readings going crazy on the screen)

I flew the next day and readings on the logs seem ok: http://www.phantomhelp.com/LogViewer/N7W9K04VIJPZJQOM4FDD/ and http://www.phantomhelp.com/LogViewer/95SA6Z1V4HM04OLMQE9E/ but at start (like 10 meters high) I did see some readings going crazy on the screen again.

What can it be?
had it once but it was snowing so that was my bad, but this time everything was clear...

Some pics to show you the sky was clear (no fog)

Cant see the pictures

Alexey Batalov Posted at 2018-8-7 09:43
Cant see the pictures

Yes you are right, I will relink them

Pics added

Nice pics by the way..   As for your issues with the Spark, it could be just random interference depending on where you fly.   If it's doing it all the time then there could be an issue with the drone itself.   I would reload DJo Go app,  re calibrate everything including Controller, IMU and Compass and see how that goes..  Also check firmware.     If all else fails contact DJI for a hardware issue.   Good Luck.

PS...  Clean the underbody sensors mine got dirty and height readings were being thrown out.  

Yeah it was all clean that why it was weird.
I will check on the next flight, somewhere else, to see if have issues again

arimk Posted at 2018-8-8 01:20
Yeah it was all clean that why it was weird.
I will check on the next flight, somewhere else, to see if have issues again

Good Luck