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ESTIMATION OF SURFACE ALBEDO BASED ON FY-3D MERSI-2 TOA DATA

文献类型: 会议论文

第一作者: Chunliang Zhaol

作者: Chunliang Zhaol 1 ; Jinlong Fan 1 ; Zhihao Qin 2 ; Wenbo Xu 3 ; Wenhui Du 2 ; Shifeng Li 2 ; Abbasi Bllawal 2 ; kuanle Bao 1 ;

作者机构: 1.National Satellite Meteorological Center

2.Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences

3.School of Resources and Environment, University of Electronic Science and Technology of China

关键词: Surface albedo;Lookup table;FY-3D;MERSI-2;6S

会议名称: IEEE International Geoscience and Remote Sensing Symposium

主办单位:

页码: 6714-6717

摘要: Surface albedo is an important land surface characteristic parameter in the study of radiation an energy balance, which can determine the distribution process of radiant energy between the earth's surface and the atmosphere. In this paper, we propose a direct estimation algorithm based on FY-3D Medium Resolution Spectral Imager -2 (MERSI-2) top of atmosphere reflectivity (TOA). The core of this algorithm is to establish a regression relationship between MERSI-2 TOA and shortwave surface broadband albedo. First, the 6S atmospheric radiation transmission model is used to simulate the TOA of MERIS-2 and MODIS under various atmospheric conditions, multiple observation angles, and various BRDF surface characteristics. Next, a linear regression method is proposed to obtain the conversion coefficient between TOA of MERSI-2 and MODIS. Finally, convert MODIS albedo lookup table into MERSI-2 albedo lookup table. FY-3D MERSI-2 surface albedo can be obtained by calling MERSI-2 lookup table. The cross-validation results show that the proposed algorithm obtains better performance.

分类号: tp7-53

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