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双多普勒雷达风场反演误差和资料的质量控制
引用本文:刘黎平,张沛源,梁海河,牛昉,周海光.双多普勒雷达风场反演误差和资料的质量控制[J].应用气象学报,2003,14(1):17-29.
作者姓名:刘黎平  张沛源  梁海河  牛昉  周海光
作者单位:中国气象科学研究院 北京 100081
基金项目:973“中国暴雨”项目 (G1 9980 40 91 2 )的资助
摘    要:提出了用双多普勒雷达观测资料进行回波强度、径向速度和方位定位的质量控制方法,以及利用概率分布法订正配对的双多普勒雷达回波强度的方法。以2001年973“中国暴雨”外场试验期间获取的双多普勒雷达观测资料为例,比较了合肥、马鞍山和宜昌、荆州的两对双多普勒雷达同步观测的回波强度、径向速度和方位的改变对观测数据对比的影响;分析了这两对双多普勒雷达径向速度测量误差引起的风场反演的误差。结果表明:两对双多普勒雷达观测的回波强度和径向速度的空间位置和变化趋势比较一致,合肥与马鞍山雷达的回波强度有一定差异,径向速度也有1~2 m/s的差异。风场反演的误差与风场的方向、大小、空间位置等有关。在两个径向速度夹角在40°~140°范围内,共面上的风场的反演误差在1~2倍的雷达探测径向速度的误差范围内。

关 键 词:双多普勒雷达    误差分析    质量控制
收稿时间:2001-12-27
修稿时间:2001年12月27

Error Estimation in Wind Fields Derived from Dual-Doppler Radar and Data Quality Control
Liu Liping,Zhang Peiyuan,Liang Haihe,Niu Fang\ Zhou Haiguang.Error Estimation in Wind Fields Derived from Dual-Doppler Radar and Data Quality Control[J].Quarterly Journal of Applied Meteorology,2003,14(1):17-29.
Authors:Liu Liping  Zhang Peiyuan  Liang Haihe  Niu Fang\ Zhou Haiguang
Affiliation:Chinese Academy of Meteorological Sciences, Beijing 100081
Abstract:The method for quality control of dual-Doppler radar reflectivity, radial velocity and azimuthal location is introduced. The reflectivity correction approach with probability distribution method is presented. The two dual-Doppler radar systems in Hefei and Ma’anshan, Anhui Province, Yichang and Jiangzhou, Hubei Province, were used to observe the wind structure of the precipitation systems in the China Heavy Rainfall Experiment and Study in 2001. The reflectivities and radial velocities from the dual-Doppler radar are compared and the effect of azimuth location on dual-Doppler radar data is analyzed. The errors of wind derived from the two Doppler radar systems are estimated. The results show that the patterns of reflectivity and radial velocity measured by the Doppler radar systems are similar; but the values of reflectivity measured at Hefei and Ma’anshan are obviously different; the deviation of velocity measured by the two radars is 1-2 m/s. The error of wind derived from dual-Doppler radar is relative to wind direction, speed and position. The error is within 2 times of the measurement error of radial velocity in the area where the angle between the two radial velocities is in 40o-140 o. These results are valuable for the use of the dual-Doppler radar data and the observation by dual-Doppler radar.
Keywords:Dual Doppler radar  Error analysis  Quality control
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