Title :
Uncertainty analysis for NDVI using the physical models
Author :
Juanjuan, Jing ; Liangyun, Liu ; Jihua, Wang ; Jindi, Wang ; Chunjiang, Zhao
Author_Institution :
National Eng. Res. Center for Inf. Technol. in Agric., Beijing, China
Abstract :
NDVI is the most widely applied vegetation index, it can indicate the information of growth status, LAI, et al. However, NDVI is also affected by the atmosphere conditions, soil background, view conditions and so on. In this paper, we analyses the effects of chlorophyll, surface soil moisture, the ratio of sky light, view zenith and Sun zenith on NDVI under different LAI using the leaf radiative transfer model PROSPECT and canopy reflectance model SAIL, and find the sensitive factors and ranges.
Keywords :
atmospheric boundary layer; geophysical signal processing; radiative transfer; soil; vegetation mapping; LAI; NDVI; PROSPECT model; SAIL model; atmosphere conditions; canopy reflectance model; chlorophyll; growth status; leaf radiative transfer model; physical models; sensitive factors; sky light ratio; soil background; sun zenith; surface soil moisture; uncertainty analysis; vegetation index; view zenith; Atmosphere; Atmospheric modeling; Azimuth; Optical sensors; Reflectivity; Remote sensing; Soil; Sun; Uncertainty; Vegetation;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004 IEEE International
Print_ISBN :
0-7803-8742-2
DOI :
10.1109/IGARSS.2004.1370093
