Comparison of precipitation observations from a prototype space-based cloud radar and ground-based radars
Comparison of precipitation observations from a prototype space-based cloud radar and ground-based radars
复制标题
原型天基云雷达和地面雷达降水观测的比较
DOI：
10.1007/s00376-012-1233-6
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发表时间：
2012-10
影响因子：
5.8
通讯作者：
Zhong Lingzhi
中科院分区：
文献类型：
--
作者：
Yu Danru;Yang Hu;Zhao Chonghui;Zhong Lingzhi
2010年7月，开发了一个原型天基测云雷达，并安装在一架飞机上，用于观测中国天津上空的降水系统。地面S波段和Ka波段雷达被用来检查原型的观测能力。提出了一种不同波长、不同空间分辨率、不同平台雷达间的交叉比较算法。分析了雷达间的反射率偏差、相关系数和标准差。在给定雨滴谱分布的情况下，模拟了S波段和Ka波段雷达的等效反射率偏差。结果表明，散射特性引起的S波段和Ka波段雷达反射率偏差小于5 dB，对于弱降水，偏差可以忽略不计。原型天基测云雷达能够测量合理的反射率垂直分布，但地面以上1.5公里高度以下的反射率被地面杂波掩盖。原型天基测云雷达测得的反射率比S波段多普勒雷达（SA雷达）强约10.9 dB，比地基测云雷达强约13.7 dB。SA雷达测得的反射率比地面测云雷达强0.4dB。该研究为定量考核天基雷达的观测能力提供了一种方法。
A prototype space-based cloud radar has been developed and was installed on an airplane to observe a precipitation system over Tianjin, China in July 2010. Ground-based S-band and Ka-band radars were used to examine the observational capability of the prototype. A cross-comparison algorithm between different wavelengths, spatial resolutions and platform radars is presented. The reflectivity biases, correlation coefficients and standard deviations between the radars are analyzed. The equivalent reflectivity bias between the S- and Ka-band radars were simulated with a given raindrop size distribution. The results indicated that reflectivity bias between the S- and Ka-band radars due to scattering properties was less than 5 dB, and for weak precipitation the bias was negligible. The prototype space-based cloud radar was able to measure a reasonable vertical profile of reflectivity, but the reflectivity below an altitude of 1.5 km above ground level was obscured by ground clutter. The measured reflectivity by the prototype space-based cloud radar was approximately 10.9 dB stronger than that by the S-band Doppler radar (SA radar), and 13.7 dB stronger than that by the ground-based cloud radar. The reflectivity measured by the SA radar was 0.4 dB stronger than that by the ground-based cloud radar. This study could provide a method for the quantitative examination of the observation ability for space-based radars.
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影响因子：
8
作者：
G. Stephens;D. Vane;R. Boain;G. Mace;K. Sassen;Zhien Wang;A. Illingworth;E. O'connor;W. Rossow
通讯作者：
G. Stephens;D. Vane;R. Boain;G. Mace;K. Sassen;Zhien Wang;A. Illingworth;E. O'connor;W. Rossow
影响因子：
5.8
作者：
L. Zhong;Liping Liu;S. Feng;Runsheng Ge;Zhe Zhang
通讯作者：
L. Zhong;Liping Liu;S. Feng;Runsheng Ge;Zhe Zhang
影响因子：
1.9
作者：
BARBER, P;YEH, C
通讯作者：
YEH, C
影响因子：
2.2
作者：
Marchand, Roger;Mace, Gerald G.;Stephens, Graeme
通讯作者：
Stephens, Graeme
DOI：
10.1175/1520-0450(1993)032
发表时间：
1993-02
期刊：
Journal of Applied Meteorology
影响因子：
--
作者：
T. Bell;N. Reid
通讯作者：
T. Bell;N. Reid