【摘要】：近年來,廣東等地陸續(xù)建設(shè)了業(yè)務(wù)運(yùn)行的雙極化天氣雷達(dá)。隨著我國雙極化雷達(dá)的發(fā)展步入業(yè)務(wù)應(yīng)用階段,提出了更多亟待開展的研究課題,如探測(cè)降雨能力的評(píng)估和提高、雷達(dá)測(cè)量信息可靠性控制等。針對(duì)我國業(yè)務(wù)運(yùn)行的雙極化天氣雷達(dá)定量測(cè)雨精度的評(píng)估和提高工作,利用雙極化雷達(dá)在目標(biāo)信息識(shí)別技術(shù)方面的特殊優(yōu)勢(shì),基于珠海業(yè)務(wù)運(yùn)行的雙極化雷達(dá),本文提出了一種基于目標(biāo)信息識(shí)別技術(shù)的雙極化雷達(dá)HCA-LIQ最優(yōu)化定量測(cè)雨方法。該方法參考了 CSU-ICE最優(yōu)化算法的測(cè)量模型,以及利用了雙極化雷達(dá)多種測(cè)雨公式的優(yōu)勢(shì),并且對(duì)公式做了本地化改進(jìn)。為了對(duì)本文提出的HCA-LIQ最優(yōu)化方法的測(cè)量效果進(jìn)行統(tǒng)計(jì)分析,利用珠海業(yè)務(wù)運(yùn)行的雙極化雷達(dá)和地面實(shí)測(cè)信息,以兩次華南夏季典型的降雨樣本為例,對(duì)HCA-LIQ最優(yōu)化方法的測(cè)量偏差進(jìn)行了時(shí)空變化分析,并且與CSU-ICE最優(yōu)化方法、R (ZH)方法進(jìn)行了對(duì)比研究。實(shí)驗(yàn)結(jié)果表明:本文HCA-LIQ最優(yōu)化算法表現(xiàn)出與實(shí)測(cè)結(jié)果較強(qiáng)的相關(guān)性且有著較好的穩(wěn)定性;三項(xiàng)誤差評(píng)估指標(biāo)均要優(yōu)于CSU-ICE最優(yōu)化算法;與R (ZH)方法相比,HCA-LIQ最優(yōu)化算法很大程度上提高了對(duì)大到暴雨的測(cè)量精度。進(jìn)一步對(duì)珠海和廣州兩部業(yè)務(wù)運(yùn)行的雙極化雷達(dá)做了對(duì)比研究。不僅比較分析了兩部雷達(dá)在共同覆蓋區(qū)域內(nèi)對(duì)同一降雨樣本探測(cè)的雷達(dá)電磁輻射強(qiáng)度大小,而且對(duì)比了使用HCA-LIQ最優(yōu)化算法進(jìn)行測(cè)雨的效果。實(shí)驗(yàn)結(jié)果表明:由于采樣空間的差異、雷達(dá)波的衰減、雷達(dá)標(biāo)定的影響,兩部雷達(dá)在相同時(shí)段探測(cè)相同區(qū)域的電磁輻射強(qiáng)度是有差異的;廣州雷達(dá)測(cè)雨效果的三項(xiàng)評(píng)估指標(biāo)均要明顯優(yōu)于珠海雷達(dá),其主要原因是2016年珠海雷達(dá)本身的系統(tǒng)誤差偏大。
[Abstract]:In recent years, Guangdong and other places have been built business operation of dual-polarization weather radar. With the development of dual-polarization radar in China, more and more research topics are put forward, such as the evaluation and improvement of rainfall detection ability, reliability control of radar measurement information and so on. Aiming at the work of evaluating and improving the quantitative rain measurement accuracy of dual-polarization weather radar in our country, the dual polarization radar based on Zhuhai operational dual polarization radar is based on the special advantage of dual polarization radar in target information recognition technology. This paper presents an optimal quantitative rain measurement method for dual polarimetric radar based on target information recognition technology by HCA-LIQ. The method refers to the measurement model of the CSU-ICE optimization algorithm, and makes use of the advantages of many rain measurement formulas of dual-polarization radar, and improves the formula locally. In order to make a statistical analysis of the measurement results of the HCA-LIQ optimization method proposed in this paper, using the dual polarization radar operating in Zhuhai and the ground measured information, two typical rainfall samples in South China in summer are taken as an example. The measurement deviation of HCA-LIQ optimization method is analyzed in time and space, and compared with CSU-ICE optimization method, R (ZH) method. The experimental results show that the HCA-LIQ optimization algorithm has a strong correlation with the measured results and has good stability, and the three error evaluation indexes are better than the CSU-ICE optimization algorithm. Compared with the R (ZH) method, the HCA-LIQ optimization algorithm greatly improves the measurement accuracy of heavy rain. Furthermore, two polarimetric radars operating in Zhuhai and Guangzhou are compared. Not only the intensity of electromagnetic radiation detected by two radars on the same rainfall sample in a common coverage area is compared, but also the effect of using HCA-LIQ optimization algorithm to measure rain is compared. The experimental results show that because of the difference of sampling space, the attenuation of radar wave and the influence of radar calibration, the two radars have different electromagnetic radiation intensity in the same region at the same time. The three evaluation indexes of Guangzhou radar are obviously better than Zhuhai radar. The main reason is that the systematic error of Zhuhai radar in 2016 is on the high side.
【學(xué)位授予單位】：南京信息工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN959.4

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