How Does Multiple Scattering Affect the Spaceborne W-Band Radar Measurements at Ranges Close to and Crossing the Sea-Surface Range?
How Does Multiple Scattering Affect the Spaceborne W-Band Radar Measurements at Ranges Close to and Crossing the Sea-Surface Range?
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DOI：
10.1109/tgrs.2008.916085
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发表时间：
2008-05
影响因子：
8.2
通讯作者：
A. Battaglia;C. Simmer
中科院分区：
文献类型：
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作者：
A. Battaglia;C. Simmer
能够处理多重断裂散射效应的雷达模拟器已经升级到包括与基尔霍夫表面的相互作用，它真实地再现了水面的效果。多重散射效应以一种直接的方式解释了CloudSat上搭载的94 ghz云剖面雷达传回的第一批图像的一些特殊特征，这些图像越过了降水系统。反射率曲线在地表范围内没有常见的波峰，是强多次散射的明显特征。此外，在云冰段的微物理假设下，多重散射在远低于表面的视范围内产生长信号尾，具有很强的灵敏度。给出了在CloudSat和EarthCARE两种配置下，在地表和近地表范围内的多次散射增强估计以及简化降水剖面的饱和水平。
A radar simulator capable of treating multiple-breakscattering effects has been upgraded to include the interaction with a Kirchoff surface, which realistically reproduces the effect of water surfaces. Multiple-scattering effects explain in a straightforward way some peculiar features of the first images delivered by the 94-GHz cloud-profiling radar onboard the CloudSat, overpassing precipitating systems. The reflectivity profiles without the usual peaks at surface range are found to be distinctive signatures of strong multiple scattering. Moreover, multiple scattering is responsible for producing long signal tails at apparent ranges far below the surface with a strong sensitivity on the microphysical assumptions of the icy segment of the cloud. The estimates of multiple-scattering enhancement at surface and close to the surface range and the saturation levels for simplified precipitating profiles for both CloudSat and EarthCARE configurations are provided.