TJones
lvl.1
Namibia
Offline
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Hello,
I am trying to use a Phantom 4 Pro to fly photogrammetry surveys where I need it to stay at a constant altitude the whole time.
Unfortunately when flying it is continually losing altitude slowly the whole time, but it doesn't realise this. On the app it will list the altitude as constant, but if I hover the drone just above the horizon I can watch as it slowly descends below the horizon and then keeps descending until I touch the control to make it fly up again. At altitudes of around 1-1.5 meters it holds its altitude well, which suggests the VPS is working properly, it's just at any altitude higher than this it's constantly descending.
So if I'm trying to fly a drone survey at 100m above the ground, about 10mins into the survey it has already dropped to ~50m but still thinks it's flying at 100m.
I have updated the firmware, calibrated the IMU, compass and the VPS, cleaned the VPS sensors, everything I can think of. But unfortunately the issue still persists. Does anyone have any suggestions as to what is causing this issue or what a potential fix might be please?
Thanks a lot.
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