遥感影像邻坡反射辐射计算与分析探讨

罗庆洲; 王培法; 石玉立; 李先华

doi:10.13203/j.whugis20120181

遥感影像邻坡反射辐射计算与分析探讨

¹ 南京信息工程大学遥感学院,江苏南京,210044;² 上海大学通信与信息工程学院,上海,200072

基金项目: 国家自然科学基金资助项目(41001288)；江苏省自然科学基金资助项目(BK2010571)；江苏高校优势学科建设工程项目

详细信息

作者简介:
罗庆洲,博士,主要从事遥感信息处理、GIS开发与气象应用研究。

中图分类号: P227.4;TP753
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出版历程
- 收稿日期: 2013-02-22
- 修回日期: 2014-05-04
- 发布日期: 2014-05-04

Calculating and Analyzing Radiance Reflected from NeighboringSlopes on Remote Sensing Image

¹School of Remote Sensing,Nanjing University of Information Science and Technology,Nanjing 210044,China;²School of Communication and Information Engineering,Shanghai University,Shanghai 200072,China

Funds: The National Natural Science Foundation of China,No.41001288;the Natural Science Foundation of Jiangsu Prov-ince of China,No.BK2010571;Priority Academic Program Development of Jiangsu Higher Education Institutions.

More Information

Author Bio:
LUO Qingzhou,PhD,specializes in remote sensing image processing,GIS software development and atmosphere applica-tion.

摘要

摘要: 目的通过对邻坡反射辐射机理的剖析,考虑邻坡反射路径中气柱程辐射、透过率等影响因素,建立了邻坡反射辐射物理模型,实现了对像元接收到的邻坡反射辐射照度及其比例的定量化计算。影像实验结果表明,像元接收到的邻坡反射辐射照度取决于周边下垫面反射率、地形、太阳入射光谱等因素的共同影响,高反射率的周边下垫面推升邻坡反射辐射照度;像元的邻坡反射辐射比例取决于它接收到的直接辐射、散射辐射与邻坡反射辐射的综合计算,低照度像元的邻坡反射辐射比例较高,阴影像元在弱散射波段的邻坡反射辐射比例一般高于强散射波段。
- 邻坡反射辐射 /
- 遥感 /
- 大气影响
Abstract: Objective A physically-based model for calculating radiance reflected from neighboring slopes is devel-oped.The path radiance and atmospheric transmittance of reflected terrain radiance between two adja-cent slopes are considered.The model computes terrain irradiance illumination and its ratio to total ir-radiance as quantitatively supported by DEM data and atmospheric parameters.According to an exper-iment with spot images and the principle of terrain irradiance,terrain irradiance illumination dependson the surface reflectance of the adjacent objects,terrain,the total irradiance reaching the adjacentslopes and other factors.The radiance reflected from neighboring slopes usually is small,but it has tobe accounted in high surface reflectance areas.The ratio of terrain irradiance to total irradiance de-pends on direct irradiance,diffused irradiance,and terrain irradiance,which are received by a targetpixel.The ratio of terrain irradiance to total irradiance of low illumination pixels is larger than that ofits surrounding pixels.For a shadow pixel,the ratio of terrain irradiance to total irradiance of theweak scattering bands is larger than that of the strong scattering bands.
- radiance reflected from neighboring slopes /
- remote sensing /
- atmospheric effect