用先进的雷达方法估计湍流强度

F. Yanovsky, A. O. Oude Nijhuis, O. Krasnov, C. Unal, H. Russchenberg, A. Yarovoy
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引用次数: 3

摘要

本文提出了一种利用相干全极化雷达系统从降水测量数据中检索湍流强度的先进雷达方法和新算法。该算法基于自适应估计雷达分辨率体积内的多普勒频谱宽度和平均多普勒速度在空间和时间上的方差来计算涡流耗散率。自适应包括基于反射信号处理的所有信息参数的非湍流贡献的估计和去除。通过将雷达信号反演的EDR值与现场声速风速仪测量值进行比较,验证了该算法的有效性。
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Turbulence intensity estimation using advanced radar methods
This paper presents an advanced radar method and novel algorithm for retrieving turbulence intensity from precipitation measurements, using coherent fully polarimetric radar system. The algorithm computes the Eddy dissipation rate based on adaptive estimation of a Doppler spectrum width in the radar resolution volume and a variance of the mean Doppler velocity in space and in time. The adaptation consists in estimation and removal of nonturbulent contributions to all informative parameters based on reflected signal processing. The algorithm has been verified experimentally by comparing EDR values retrieved from radar signals with in situ sonic anemometer measurements.
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