TY - SER AU - Busche, P. [and other] TI - Wind Tunnel Calibration of Sonic- and Cup Anemometers KW - WIND ENERGY KW - WIND TUNNEL CALIBRATION KW - CALIBRATION OF SONIC KW - CUP ANEMOMETERS N1 - In the past a lot of effort has been put into developing and refining suitable methods for anemometer calibration procedures and ways to classify cup anemometers (note DEWI Magazine article Calibration and Classification of Cup Anemometers No. 22 Feb. 2003), among these are Measnet harmonisation procedures and normative standards such as IEC 61400-121 Power Performance-Draft Standard ER -