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首页> 外文会议>SPIE Conference on Remote Sensing for Environmental Monitoring, GIS Applications, and Geology >East-Asia land surface emissivity maps generated from Terra/ASTERdata archives
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East-Asia land surface emissivity maps generated from Terra/ASTERdata archives

机译：来自Terra / Asterdata档案生成的东亚陆地表面发射率图

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The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) is a high-spatial-resolutionmultispectral imager on the Terra satellite launched in December 1999. The ASTER thermal infrared (TIR) subsystemhas five spectral bands with a spatial resolution of 90 m in the TIR spectral region, which are used for generation of thestandard products of surface temperature and surface spectral emissivity. High-resolution surface emissivity at fivespectral bands is unique, and is particularly useful for geological mapping. However, the emissivity product is not alwayseasy to use, because (1) its image size is about 60 km square which is not large enough for regional-scale studies, (2) itsimaged area is not fixed to the world reference system (WRS) due to a flexible pointing system, and (3) standardatmospheric correction often fails under humid conditions. Thus, in order to improve the usability of the ASTERemissivity product, we are generating land surface emissivity maps in a regional scale by applying improved retrievalalgorithms and stack/mosaic processing to an ASTER orthogonal projection dataset which have been produced from theASTER data archives by the Advanced Industrial Science and Technology (AIST), Japan. In the present paper, weintroduce East-Asia land surface emissivity maps as the first result of this project. A comparison study with MODISmonthly emissivity products (MOD 11 C3) indicates that the generated maps give more reasonable emissivity spectra withhigher spatial resolution than the MODIS emissivity products, though the maps have missing pixels in high latitude areasand humid areas.
机译：高级星载热发射和反射辐射计是在特拉卫星在1999年12月ASTER热红外（TIR）推出了高空间resolutionmultispectral成像器subsystemhas 5个光谱带具有90米的TIR光谱的空间分辨率区域，该区域被用于产生表面温度和表面光谱辐射率thestandard产品。在fivespectral频带高分辨率表面辐射是唯一的，并且是用于地质绘图特别有用。然而，该发射率产品不alwayseasy的用途，因为（1）它的图像尺寸为约60平方公里这对于区域规模研究足够大，（2）itsimaged区不被固定到世界参考系统（WRS）由于柔性瞄准系统，和（3）校正standardatmospheric往往不能在潮湿条件下。因此，为了改善ASTERemissivity产品的可用性，我们通过施加提高retrievalalgorithms和堆叠/马赛克处理到已经从theASTER数据档案的高级产生的紫菀正交投影数据集生成区域尺度陆地表面辐射图工业科学技术（AIST），日本。在本论文中，weintroduce东亚地表辐射映射作为该项目的第一个结果。与MODISmonthly辐射产品（MOD 11 C3）的比较研究表明，产生的地图给予更合理的发射光谱withhigher比MODIS辐射产品的空间分辨率，虽然地图都在高纬度缺失像素areasand潮湿的地方。

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