The method Heliosat-2 for deriving shortwave solar radiation from satellite images
The method Heliosat-2 for deriving shortwave solar radiation from satellite images
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DOI：
10.1016/j.solener.2004.04.017
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发表时间：
2004-01-01
期刊：
影响因子：
6.7
通讯作者：
Wald, L
中科院分区：
文献类型：
--
作者：
Rigollier, C;Lefèvre, M;Wald, L
本文介绍了Heliosat-2的方法，该方法将地球静止气象卫星的观测结果转换为地面全球辐射的估计值。这一新的版本以连贯和彻底的方式综合了通过对原始方法Heliosat及其各种方法的各种利用而获得的知识。它基于相同的物理原理，但该方法的输入是校准的辐射，而不是传感器输出的数字计数。这一变化打开了使用大气光学中的物理过程的已知模型的可能性，从而消除了对经验定义的参数和总日射测量来调整它们的需要。ESRA模型用于晴空辐射的模拟。地面辐射和云辐射的评估是基于明确的公式的路径辐射和大气的透射率。对1995年1月、1995年4月和1994年7月的欧洲气象卫星图像采用了Heliosat-2号方法。35个气象站进行的日射强度测量被用来评估与文献中发现的Heliosat-1性能接近的性能。讨论了可能的改进。(C)2004年由Elsevier Ltd.出版。
This article presents the method Heliosat-2 that converts observations made by geostationary meteorological satellites into estimates of the global irradiation at ground level. This new version integrates the knowledge gained by various exploitations of the original method Heliosat and its varieties in a coherent and thorough way. It is based upon the same physical principles but the inputs to the method are calibrated radiances, instead of the digital counts output from the sensor. This change opens the possibilities of using known models of the physical processes in atmospheric optics, thus removing the need for empirically defined parameters and of pyranometric measurements to tune them. The ESRA models are used for modeling the clear-sky irradiation. The assessment of the ground albedo and the cloud albedo is based upon explicit formulations of the path radiance and the transmittance of the atmosphere. The method Heliosat-2 is applied to Meteosat images of Europe for the months of January 1995, April 1995 and July 1994. Pyranometric measurements performed by thirty-five meteorological stations are used to assess the performances that are close to those of Heliosat-1 found in the literature. Possible improvements are discussed. (C) 2004 Published by Elsevier Ltd.