Accuracy of the Collocated Transfer Standard Method for Wind Instrument Auditing

Abstract

The application of collocated data collection for the purpose of estimating the accuracy of an operating wind instrument requires some baseline demonstrating the best agreement which can be expected. A series of data were carefully taken in 1982 from six different collocated wind instruments. The published reports of these data suggest that the best agreement from averaged wind speed measurements will be between 0.3 and 0.5 m s?1 and for wind direction will be 4 to 6 degrees. A new analysis of the same data reduces the best expected agreement to about 0.2 m s?1 and 2 degrees. The several reasons for claiming the better potential accuracy for collocated measurement (auditing) with calibrated transfer standard instruments are discussed.