摘要
从地面所接收到的太阳直接辐射、天空散射辐射和临近地形反射附加的辐射三个方面分析计算地面每个像元的太阳总辐射,并在此基础上建立地表真实反射率恢复模型,实现对地形的辐射校正。在算法实现上,采用交互式数据语言(Interactive Data Language,IDL),结合6S大气校正模型和数字高程模型(DEM)进行编程实现。利用北京山区的TM遥感影像所做的实验表明该方法能有效地消除卫星影像中地形的影响,为影像的后续处理提供更真实的信息。
Topographic correction is one of the major tasks of remote sensing imagery correction. How to remove the topographic effects is a necessary step in quantitative remote sensing. Topographic correction is also a necessary step to get the real reflectance from the surface. Based on detailed analysis of illumination sources that include solar direct irradiance, sky diffuse and adjacent reflectance irradiance, this paper presents a reflectance retrieval model to remove the topographic effects in satellite images. We take the Interactive Data Language（IDL） ,6S atmospheric model and a digital elevation model（DEM） to realize the algorithms. The experiments using a Landsat TM image in Beijing mountain area proved that the results of this method can effectively remove the topographic effects, and then provide more real information for post processing of the remotely sensed images.
出处
《遥感信息》
CSCD
2009年第2期29-33,70,共6页
Remote Sensing Information
基金
国防科技工业民用专项科研技术研究项目:HJ-1卫星数据应用研究(07K00100KJ)
中国科学院知识创新工程重要方向项目:航天遥感图像仿真模拟关键技术研究(kzcx2-yw-303)
