I am researching the possibility for using a UAV calibrating The runway PAPI. I am not aware of all the methods for PAPI calibration but I am aware that our 2 local airports use full scale aircrafts to calibrate them and the costs rise at about 20-30k EUR per year for both calibrations.
As you can imagine the costs are massive for such a task compared to the potentials of a UAV platform. At the time being I am not researching whether legislation will or will not allow such a calibration method so i am only focused on the technical and practical difficulties.
At the moment I don't have any theoritical or practical expirience on calibrating PAPI so i can't really be sure whether a UAV can be up to the task so any input on this would Appreciated.