常规雷达测量回波区内部运动及与多普勒雷达的比较

汤达章;傅德胜;李力

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高原气象 ›› 1991, Vol. 10 ›› Issue (2) : 113-122.
论文

常规雷达测量回波区内部运动及与多普勒雷达的比较

  • 汤达章;傅德胜;李力
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MEASUREMENTS OF INTERNAL STORM MOTIONS BY CONVENTIONAL WEATHER RADAR AND COMPARISON WITH DOPPLER RADAR RESULTS

  • Tang Dazhang;Fu Desheng;Li Li
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摘要

本文首先简要介绍矩不变量法测量回波区内部流场的原理和实施方法,尔后用数字化雷达的PPI资料,据上述原理和实施方法得到回波区内部各回波模块的u,V分量及它们所在方位的径向速度,并将这些径向速度和同时测得的多普勒径向速度相比较。结果表明,在分析的两次天气过程共4个个例中,其准确率可达80%左右,若除去边缘效应所产生的错误风矢量,则准确率可达90%以上。这为中、小尺度灾害性天气监测和预报、云物理和人工影响天气等方面的研究提供了一个较可靠的探测手段。

Abstract

After the paper describes briefly the principle and processing technique for measuring the wind field in echo area by use of moment invariant method, the wind vectors of every module in actual PPI echo data observed by digitized conventional weather radar are estimated. In order to value quantitatively the accuracy, the estimated vectors are projected onto radar azimuth to obtain radial speed estimations. And the estimations are then compared with the radial speed field observed simultaneously by single Doppler radar. The results of comparison for four cases in two precipitation processes show that average accuracy is near 80%, and above 90% if the edge effect is eliminited.

关键词

天气雷达 / 矩不变量 / 回波区 / 多普勒雷达

Key words

Weather radar / Moment invariant / Echo area / Doppler radar

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汤达章;傅德胜;李力. 常规雷达测量回波区内部运动及与多普勒雷达的比较. 高原气象. 1991, 10(2): 113-122
汤达章;傅德胜;李力. MEASUREMENTS OF INTERNAL STORM MOTIONS BY CONVENTIONAL WEATHER RADAR AND COMPARISON WITH DOPPLER RADAR RESULTS. Plateau Meteorology. 1991, 10(2): 113-122

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