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Boundary-Layer Meteorology

, Volume 93, Issue 2, pp 227–236 | Cite as

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

  • Takanori Shimizu
  • Masakazu Suzuki
  • Akira Shimizu
Article

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.

Sonic anemometer Transducer shadow Flow angle approximation Wind speed dependence 

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Copyright information

© Kluwer Academic Publishers 1999

Authors and Affiliations

  • Takanori Shimizu
    • 1
  • Masakazu Suzuki
    • 2
  • Akira Shimizu
    • 1
  1. 1.Kyushu Research Center, Forestry and Forest Products Research InstituteKumamotoJapan
  2. 2.Graduate School of Agriculture and Life ScienceThe University of TokyoTokyoJapan

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