期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2004
卷号：XXXV Part B1
页码：361-366
出版社：Copernicus Publications
摘要：In the remote sensing user community there is a lack of consistency in definitions and properties of reflectance quantities. Onone hand, more recent satellite programs such as NASA's MODIS and MISR sensors take into account the directionaldimension of the different reflectance products. On the other hand, many published studies still remain unspecific on thereflectance quantities they are based on, or do not follow common definitions. One example is the term 'albedo' assigned tosignificantly differing products. This fact makes it difficult and confusing to evaluate and compare published results.Our contribution briefly summarizes basic reflectance nomenclature articles. The main aim is to quantify differences ofreflectance products to stress the importance of adequate usage of reflectance definitions and quantities. Results from thecomparison of directional-hemispherical reflectance versus bihemispherical reflectance and bidirectional reflectance factorsversus hemispherical-directional reflectance factors are shown. We exemplify differences of these quantities using modellingresults of a black spruce forest canopy and snow cover, as well as selected biome-specific MISR reflectance products of theyear 2001.The presented case studies can only give an insight into the dimension of the problem. The actual differences in thereflectance products of a remotely sensed surface depend on the atmospheric conditions, the surroundings, topography, andthe scattering properties of the surface itself. Never the less the presented results are urging the user community to be morespecific on the application and definition of reflectance quantities
关键词：Terminology; Comparison; Simulation; Accuracy; Vegetation; Snow; MISR
