2008 年 74 巻 740 号 p. 841-849
In recent years, the wind turbines have been installed actively and the suitable sites of wind farm have been decreased on land. On the other hand, a lot of wind energy resources are latent and it is expected that wind power will be installed in the future on the sea. This study aims to establish a measurement method of wind characteristics using a small ship for decision of suitable site for offshore wind power. We constructed the wind measurement system, which is composed of an ultrasonic anemometer, a differential GPS (DGPS) and an inertial measurement unit. The system was installed to a small ship and wind characteristics at 10 m height above the sea surface were measured by an ultrasonic anemometer on the Sea of Japan close to Tottori prefecture. Raw data of the wind velocity obtained in the proposed method includes the error caused by the pitching, rolling and yawing of the ship. In this study, the raw data of wind velocity was corrected by the data of the DGPS and the inertial measurement unit. Conclusively, the raw wind velocity contaminated by the oscillation and cruising of the ship was corrected and the wind velocity maps were obtained.