Abstract
Many of the offshore wind farm projects planned in Japan are in near-shore areas, and scanning LiDARs are increasingly being installed to observe wind condition. Before scanning LiDAR observations, a hard target calibration is conducted. In conventional hard target calibration, fixed structures around a scanning LiDAR are used as hard targets, but drones are expected to replace them because it is sometimes difficult to find suitable fixed structures for hard targets. We performed a hard target calibration using a drone and found that the results were very good and accurate enough to be used for elevation angle correction by sine curve fitting. In the future, the use of drones in hard-target calibration is expected to increase.
