Abstract

Authors

Shimizu Takanori Suzuki Masakazu and Shimizu Akira

Year

1999

Title

Examination of a Correction Procedure for the Flow Attenuation in Orthogonal Sonic Anemometers

Journal

Boundary-Layer Meteorology

Volume

93 (2)

Page

227-236

DOI

DOI: 10.1023/A:1002053313130

Keywords

Sonic anemometer, Transducer shadow, Flow angle approximation, Wind speed dependence

URL

http://www.springerlink.com/content/x89061vn26u180hj/fulltext.pdf

Abstract

In this study we examine the calibration of wind speed measured by a sonic anemometer, with an orthogonal probe configuration, with regard to the approximation of the flow angle, and the wind-speed dependence of the flow attenuation attributed to the transducer shadow. The flow angle θ should be calculated by the iterative method when the attenuation is relatively high. For a probe manufactured by Kaijo Co. TR-61C, the wind-speed dependence of the transducer shadow effect is formulated from the results of the wind-tunnel experiment. Assuming the equation is applicable to field observations, significant errors possibly remain especially when the wind speed is low, and /or the angle between the flow vector and the sonic path is small, if the wind-speed dependence in measurement errors is neglected.

Site

KHW

Remarks