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首页> 外文会议>Remote sensing of the atmosphere, clouds, and precipitation IV >Use of ASTER GDEM for separating rain echo and surface clutter in the radar observation of rain from space
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Use of ASTER GDEM for separating rain echo and surface clutter in the radar observation of rain from space

机译：利用ASTER GDEM分离雷达回波中的雨水回波和地表杂波

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摘要

Separation between rain echo and surface clutter is essential in the radar observation of rain from space. However, the separation between these becomes very difficult in the radar observation over high mountain areas where the range profile of surface clutter takes a complicated shape. It is expected that this separation problem would be solved by the use of a reliable, high resolution digital elevation model. This paper examines the feasibility of using a high resolution ASTER GDEM for the separation of rain echo and surface clutter. Using the height information of ASTER GDEM, a simulation of the range profile of the surface clutter is made by assuming triangle surface elements and Lambert's law. The simulation results are compared with some TRMM PR data. The comparison shows that the simulation produces a reasonable result in the nadir direction and, to some extent, at the antenna scan edges. Tough the occurrence is very small, there seems to be some areas where the accuracy of ASTER GDEM is not good.
机译：在雷达观测太空雨中，雨回波和地表杂波之间的分离至关重要。但是，在高山杂波表面形貌复杂的高山地区进行雷达观测时，很难将两者分开。预计将通过使用可靠的高分辨率数字高程模型来解决此分离问题。本文探讨了使用高分辨率ASTER GDEM分离雨水回波和表面杂波的可行性。利用ASTER GDEM的高度信息，通过假设三角形表面元素和兰伯特定律对表面杂波的范围轮廓进行仿真。仿真结果与一些TRMM PR数据进行了比较。比较结果表明，该模拟在最低点方向以及一定程度上在天线扫描边缘产生了合理的结果。困难的发生非常少，似乎有些地方ASTER GDEM的准确性不高。

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