| 双线偏振雷达天线辐射特性对差示反射率因子测量的影响 |
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| 引用本文： | 楚荣忠,徐宝祥.双线偏振雷达天线辐射特性对差示反射率因子测量的影响[J].高原气象,1991(3). |
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| 作者姓名： | 楚荣忠 徐宝祥 |
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| 作者单位： | 中国科学院兰州高原大气物理研究所 甘肃省兰州市
(楚荣忠)，中国科学院兰州高原大气物理研究所 甘肃省兰州市(徐宝祥) |
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| 基金项目： | 国家自然科学基金委员会资助项目~~ |
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| 摘 要： | 通过模拟分析,我们发现:由主瓣引起的水平和垂直偏振反射率因子dB数误差比旁瓣引起的同物理量dB数误差至少高一个数量级,并均与该点的反射率因子梯度有一定的相关性。主瓣引起的差反射率因子dB数误差有时可达到0.5 dB左右。这为今后对雷达天线的改进提供了依据。
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| 关 键 词： | 双线偏振雷达 天线辐射方向性 差示反射率因子 |
THE EFFECTS OF DUAL LINEAR POLARIZATION RADAR ANTENNA RADIATION CHARACTERISTICS ON THE MEASUREMENTS OF DIFFERENTIAL REFLECTIVITY |
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| Chu Rongzhong Xu Baoxiang.THE EFFECTS OF DUAL LINEAR POLARIZATION RADAR ANTENNA RADIATION CHARACTERISTICS ON THE MEASUREMENTS OF DIFFERENTIAL REFLECTIVITY[J].Plateau Meteorology,1991(3). |
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| Authors: | Chu Rongzhong Xu Baoxiang |
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| Abstract: | Based on numerical simulations, it is found that the deviation (dB) of the reflectivity for the horizontal or the vertical polarization transmission calculated from main-lobe of the antenna gain pattern is at least one magnitude higher than the devia-tion(dB) as considering the effect of the side-lobe only. And it is also found that these deviations are correlated to a certain extent with the reflectivity gradient in cloud. The deviation of the differential reflectivity caused by the difference of the main-lobes at horizontal and vertical polarizations may be sometimes as high as 0.5 dB or so. This could provide some important evidences for the improvement of the radar antenna. |
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| Keywords: | Dual-linear polarization radar Antenna gain pattern Differential reflectivity |
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