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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Retrieval of the vertical rainfall structure from the MADRAS imager data of the Megha-Tropiques satellite
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Retrieval of the vertical rainfall structure from the MADRAS imager data of the Megha-Tropiques satellite

机译：从Megha-Tropiques卫星的MADRAS成像仪数据中提取垂直降雨结构

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摘要

A physically based algorithm for the retrieval of vertical cloud and rain structure from the MADRAS imager data of Megha-Tropiques is developed. A community-developed meso-scale numerical weather simulation software, WRF, has been used for simulationof thermodynamic, cloud and rain profiles for a cyclone case. The WRF simulated profiles in conjunction with two of the rain-measuring instruments on-board the TRMM satellite, the TMI and the TRMM PR, are used as a priori cloud and rain profiles database. These profiles were input to an in-house radiative transfer code. Brightness temperatures at MADRAS imager frequencies were simulated to complete the generation of a priori database. Brightness temperatures were also simulated for TMI channels for comparison, wherever possible.Sample MADRAS data were downloaded and retrievals were performed for the MADRAS channels. The retrieved wind speed, column-integrated liquid water and surface rain rate were compared against the Level 2 data of Megha-Tropiques mission. A comparison of daily averaged rain rate with TMI retrievals was also made. The results show that the retrieval algorithm is robust and able to retrieve the vertical cloud and rain structure even in the absence of a radar on-board the Megha-Tropiques.
机译：开发了一种基于物理的算法，可从Megha-Tropiques的MADRAS成像器数据中检索垂直云和雨水结构。社区开发的中尺度数值天气模拟软件WRF已用于模拟旋风箱的热力学，云和雨廓。 WRF模拟廓线与TRMM卫星上的两种降雨测量仪器TMI和TRMM PR一起用作先验云和降雨廓形数据库。这些配置文件被输入到内部辐射传输代码中。模拟MADRAS成像仪频率下的亮度温度，以完成先验数据库的生成。还尽可能模拟了TMI通道的亮度温度以进行比较。下载了示例MADRAS数据，并对MADRAS通道进行了检索。将检索到的风速，列积分的液态水和地表降雨率与Megha-Tropiques任务的2级数据进行了比较。还比较了每日平均降雨率和TMI检索值。结果表明，即使Megha-Tropiques机载雷达不存在，该检索算法也很健壮，并且能够检索垂直的云和雨结构。

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