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Measurement errors and correction of the UAT-2 ultrasonic anemometer

Science China(Technological Sciences) 2015年第4期58卷 677-686页

作者： CHENG Xue Ling PENG Zhen HU Fei ZENG Qing Cun LUO Wei Dong ZHAO Yi Jun HONG Zhong Xiang State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of Sciences Department of Atmospheric Science Nanjing University

Two kinds of measurement errors have been observed in the recently developed UAT-2 ultrasonic *** is the flow distortion produced by a"blocking effect",and the other is the angle of attack caused by the vertical misalignment of the ***,we study these errors and discuss the possible correction *** a wind tunnel experiment and numerical simulation,a 3D calibration matrix was developed to correct the"blocking effect".In the field test,the angle of attack was detected by an inclinometer settled on the reference plane of the anemometer,and the instrumental misalignment or tilt was corrected by a coordinate *** combined use of an inclinometer and the proposed correction method may help find a new approach for vertical velocity correction.

关键词： ultrasonic anemometer transducer array blocking effect attack angle inclinometer

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A new method of measuring optical turbulence of atmospheric surface layer at Antarctic Taishan Station with ultrasonic anemometer

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Advances in Polar Science 2015年第4期26卷 305-310页

作者： WU Xiaoqing TIAN Qiguo JIANG Peng CHAI Bo QING Chun CAI Jun JIN Xinmiao ZHOU Hongyan Anhui Institute of Optics and Fine Mechanics Chinese Academy of Science Key Laboratory of Atmospheric Composition and Optical Radiation Chinese Academy of Science Polar Research Institute of China University of Science and Technology of China Science Island Branch of Graduate School University of Science and Technology of China

To find the optimal location for large-aperture telescopes is a goal of astronomy. Chinese Antarctic astronomy has begun to flourish in recent years, and it is an urgent need in basic astronomical work to measure and analyze the optical turbulence spatiotemporal distribution in the Antarctic region. We analyzed turbulence data measured by a mobile atmospheric parameter measurement system from 30 December 2013 to 10 February 2014 at Antarctic Taishan Station. Because there is a discrepancy between the refractive index structure constant Cn2 measured by an ultrasonic anemometer with a single-point temperature structure function method and by micro-thermometer, a new method to measure C,2 with a temperature spectrum method is proposed herein. Through comparing long-term continuous Cn2 data derived from ultrasonic anemometer with those via the new method and micro-thermometer, trend, magnitude and measured weak turbulence of-2× 10-16m-2/3 are generally satisfactory. The reason for the discrepancy in Cn2 measurement between the ultrasonic anemometer with the old method and micro-thermometer is investigated.

关键词： optical turbulence ultrasonic anemometer temperature spectrum method Antarctic Taishan Station

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