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首页> 外文期刊>Journal of hydroscience and hydraulic engineering >MICROWAVE REMOTE SENSING OF LAND SURFACE STATUS DURING A LONG TERM EXPERIMENT, AND ITS APPLICATION TO VALIDATE A PARAMETER OPTIMIZATION METHOD
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MICROWAVE REMOTE SENSING OF LAND SURFACE STATUS DURING A LONG TERM EXPERIMENT, AND ITS APPLICATION TO VALIDATE A PARAMETER OPTIMIZATION METHOD

机译：长期实验中微波遥感土地表面状态及其在参数优化方法验证中的应用

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摘要

Remote sensing, land surface modeling, and data assimilation are believed to yield an estimate of soil moisture and surface energy fluxes at various temporal and spatial scales. The aim of this study is to which aims to improve our understanding of the effect of land surface status on the microwave emission through a field experiment named 'Tanashi Experiment'. The scientific objectives are presented and the corresponding experiment set-up is described. The effects of soil moisture and vegetation layer on the brightness of various frequencies are analyzed. The sensitivity of higher frequencies (18.7 and 36.5 GHz) on the soil moisture changing is also identified. A Land Data Assimilation System developed by the University of Tokyo (LDAS-UT) is validated by using data obtained from this experiment. And one important merit of LDAS-UT, parameter optimization, is verified through the comparison of optimized parameters with the in situ observed ones.
机译：据信遥感，陆地表面建模和数据同化可以对各种时空尺度的土壤水分和表面能通量做出估计。这项研究的目的是通过名为“ Tanashi实验”的田间试验来增进我们对陆地表面状况对微波发射影响的理解。提出了科学目标并描述了相应的实验装置。分析了土壤水分和植被层对不同频率亮度的影响。还确定了较高频率（18.7和36.5 GHz）对土壤水分变化的敏感性。东京大学开发的土地数据同化系统（LDAS-UT）通过使用从该实验获得的数据进行了验证。通过将优化参数与现场观测参数进行比较，验证了LDAS-UT的一项重要优点，即参数优化。

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    Hui Lu; Toshio Koike; Hiroyuki Tsutsui; David Ndegwa KURIA; Tobias Graf; Kun Yang; Xin Li;

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    The Department of Civil Engineering, The University of Tokyo, Bunkyo-ku, Tokyo, Japan;

    The Department of Civil Engineering, The University of Tokyo, Bunkyo-ku, Tokyo, Japan;

    The Department of Civil Engineering, The University of Tokyo, Bunkyo-ku, Tokyo, Japan;

    The Department of Civil Engineering, The University of Tokyo, Bunkyo-ku, Tokyo, Japan;

    The Department of Civil Engineering, The University of Tokyo, Bunkyo-ku, Tokyo, Japan;

    Institute of Tibet Plateau Research, Chinese Academy of Sciences, Beijing, China;

    Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, China;

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