Practical atmospheric correction of NOAA-AVHRR data using the bare-sand soil line method
Abstract:Because it is very difficult to acquire atmospheric properties, a practical atmospheric correction algorithm, the bare-sand soil line method, was developed in this paper. There is a no change bare-sand soil line in the plane coordinate of channel 1 and channel 2 of the National Oceanic and Atmospheric Administration's (NOAA) Advanced Very High Resolution Radiometer (AVHRR) for a given bare sand in a region. Because of the atmospheric effects on the remotely sensed data of AVHRR, the bare-sand soil line of the satellite differs from that of the ground. We correct the former to the latter using coordinate transformation, and obtain the average correction values of the whole image, ΔR and ΔNIR. Finally, all the data in the image can be corrected using ΔR and ΔNIR respectively. This method was researched in the Loess Plateau region, China (33° ∼ 43°N and 102° ∼ 112°E). The results indicate that the atmospheric correction for bare sand, grassland, forest and farmland have a satisfactory accuracy, except the channel 2 of water. This method can be used to correct the atmospheric effects on the remotely sensed data of AVHRR for any date in arid and semi-arid regions.
Document Type: Research Article
Affiliations: Laboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, 20 Nan Xin Cun, Xiangshan, Beijing 100093, China
Publication date: 2003-09-01