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：2000
卷号：XXXIII Part B1
页码：231-238
出版社：Copernicus Publications
摘要：The "Salar de Uyuni"(Bolivia) has been pointed out as a potential reference site for spectral calibration purposes (Price, 1987). TM/Landsat 5 images from 1988 to 1997 were used in order to evaluate the spectral characteristics of the "Salar de Uyuni" surface. It was considered images of six TM spectral bands (band 1, 2, 3, 4, 5 and 7) which were used to calculate Variation Coefficients (VC) values for each pixel in each spectral band. These VC values were exchanged by color tones and VC images were created. It was possible to evaluate the spectral stability of the "salar" surface for each TM band through the VC images. The results have pointed out that the "salar" surface is not so stable as could be firstly supposed, mainly in infrared region in which surrounding areas were identified as more stable for this spectral region. Radiometric measurements were performed in field in order to compare them to orbital data
