Vol. 18, issue 10, article # 12

pdf Fedorov V. A. Alternative method of calculation of circular parameters of horizontal wind velocity in sodar measurements. // Atmospheric and oceanic optics. 2005. V. 18. No. 10. P. 831-836.
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The paper describes the algorithms of determination of circular averages, standard deviations, skewness, and kurtosis of the direction of the horizontal wind velocity Vh. obtained from measurements with a Volna-3 sodar. In contrast to the standard approach, they do not require preliminary calculation of current φ(i) values themselves. The trigonometric moments are determined through the corresponding functions of the orthogonal components of the vector Vh.. The usefulness of circular standard deviation as a measure of the angular variance of the horizontal wind velocity in acoustic sounding of the atmosphere is addressed.