Abstract
We have developed a standard UV-LED light source mounted on an unmanned aerial vehicle (UAV), so-called the Opt-copter, for the calibration of the Fluorescence Detectors (FDs) of the Telescope Array experiment. The positioning accuracy of the GPS controlled UAV is ~ 10 cm, which allows accurate calibration of the pointing directions of the FD PMTs. We tried the analysis of the field of view of the telescope using this system. The pointing direction was determined to be less than 0.1 degree using our analysis. We report the hardware details of the device and the status of data analysis.
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