| X波段全固态天气雷达降水探测能力的研究 |
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| 引用本文： | 史朝,范凯波,李学华,王旭.X波段全固态天气雷达降水探测能力的研究[J].大气科学学报,2013,36(3):379-384. |
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| 作者姓名： | 史朝 范凯波 李学华 王旭 |
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| 作者单位： | 中国气象局 大气探测重点开放实验室, 四川 成都 610225;成都信息工程学院, 四川 成都 610225;中国科学院 水利部成都山地灾害与环境研究所, 四川 成都 610041;中国科学院大学, 北京 100049;成都信息工程学院, 四川 成都 610225;中国气象局 大气探测重点开放实验室, 四川 成都 610225;成都信息工程学院, 四川 成都 610225;中国气象局 大气探测重点开放实验室, 四川 成都 610225;成都信息工程学院, 四川 成都 610225 |
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| 基金项目： | 国家高技术研究发展计划(863计划)项目(2007AA061901) |
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| 摘 要： | 以中国气象局大气探测重点开放实验室的X波段全固态天气雷达为试验平台,介绍了雷达距离探测分辨力满足50 m的条件下,通过组合探测模式弥补宽脉冲造成的雷达近场探测盲区;重点分析了由脉冲压缩引入的距离副瓣对气象回波强度探测范围的影响,通过计算说明双向加权是在牺牲峰值发射功率的代价下较大程度地改善主瓣能量泄露,但这种方法并不适宜峰值功率与压缩比有限的应用。进一步引入了自适应旁瓣抑制方法,模拟表明该方法峰值旁瓣抑制能力近似为-50 dB,且主瓣展宽系数接近于1。并与经典的匹配方式和汉明加权失配滤波方式进行了试验对比,弱信号探测改善约4 dB;最后在分析雷达最远探测距离的基础上,通过一次外场观测案例与713型雷达对比了降水探测能力,该固态雷达能够探测150 km范围内强于10 dBz的降水回波。
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| 关 键 词： | 全固态 天气雷达 降水探测 |
| 收稿时间： | 2012/2/13 0:00:00 |
| 修稿时间： | 2012/9/15 0:00:00 |
Study of detection capability of X-band fully solid-state weather radar on precipitation |
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| SHI Zhao,FAN Kai-bo,LI Xue-hua and WANG Xu.Study of detection capability of X-band fully solid-state weather radar on precipitation[J].大气科学学报,2013,36(3):379-384. |
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| Authors: | SHI Zhao FAN Kai-bo LI Xue-hua and WANG Xu |
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| Institution: | Key Laboratory of Atmospheric Sounding, China Meteorological Administration, Chengdu 610225, China;Chengdu University of Information Technology, Chengdu 610225, China;Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China;University of Chinese Academy of Sciences, Beijing 100049, China;Chengdu University of Information Technology, Chengdu 610225, China;Key Laboratory of Atmospheric Sounding, China Meteorological Administration, Chengdu 610225, China;Chengdu University of Information Technology, Chengdu 610225, China;Key Laboratory of Atmospheric Sounding, China Meteorological Administration, Chengdu 610225, China;Chengdu University of Information Technology, Chengdu 610225, China |
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| Abstract: | Based on a test platform of the X-band fully solid-state weather radar at Key Laboratory of Atmospheric Sounding of China Meteorological Administration,this paper introduces that the combination working mode is designed to detect the blind spot of radar near-field detection,which is caused by wide pulse,under the condition of 50 m radar detection distance resolution.This paper mainly analyzes the impact of time sidelobe leaked by main-lobe on detection range of the meteorological echo intensity.Transmission Amplitude Taper will improve the level of sidelobe compression under the loss of peak emission power,however,it is not suitable for limited peak power and low compression factor.Furthermore,an adaptive method is introduced to suppress sidelobe.The simulations show that,using the method,the peak sidelobe suppression is nearly -50 dB,and the main-lobe broadening coefficient is close to 1.Compared with the classic matching method and hamming weighted method,it will improve about 4 dB for the weak signals detection.Finally,based on the analysis of radar detectable maximum distance,the precipitation detection capability of the X-band radar is compared with the 713 radar in a field observation case.It shows that the X-band solid-state radar can detect precipitation echoes stronger than 10 dBz within 150 km. |
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| Keywords: | fully solid-state weather radar precipitation detection |
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