I am using phantom 4 pro with pix4d capture android. my start level is 876.00 m. i am arranging altitude 80m which makes 876.00+ 80= 956.00 m altitude. our tallest tower crane top level is 953.00m. So my flight level must me 3 m higher than the top of crane. Unfortunately during mission drone stop when passing on crane, i cant see from ground how close it was to the crane but i can say it was not the highest point of crane, it was even lower part of boom and drone hang itself on air for sometime, after i tried to rise it up or move and after some try it release ıtself and continue mission. So my question is, what is the obstacele sensor distance for p4p? it can fly lower then 90m, altough i see on app flying 90m? is there any calibration or etc that i have to do with dji app?