This is to help fix the tilted horizon issue in the Phantom 3, Phantom 4, Inspire 1, and All DJI Gimbals.
First do a COLD IMU Calibration. To do this cool down your machine over an A/C vent or or in the fridge. Do not cool the battery. Preform the IMU calibration on a perfectly level surface. If you can use a bubble level to check the surface do so.
Do a gimbal calibration while on the ground, then let the UAV sit for 2 minutes.
Next calibrate the compass before flight.
If needed do a gimbal calibration in the air.
Hope that helps with the tilted horizon issue in your pictures.
