TY - GEN
T1 - Angular normalization of ENVISAT ASAR data over sahelian-grassland using a coherent scattering model
AU - Monsiváis, A.
AU - Chênerie, I.
AU - Baup, F.
AU - Mougin, E.
AU - Sarabandi, K.
PY - 2006
Y1 - 2006
N2 - ENVISAT-ASAR acquires data at different incidence angles. For temporal soil and vegetation parameters retrieval it is necessary to normalize theradar data for the angular behavior of the radar backscatter. A simple method for characterizing the angular behavior is by plotting the measurements of the backscattering coefficient during the dry season (stationary target) as a function of the incidence angle and considering that this angular dependence is conserved throughout the rainy season as well. However, this method is not sufficiently precise for data gathered in the rainy season since the scattering mechanisms of the vegetation and soil are different. Instead, we propose the use of a coherent scattering model for vegetation in order to carry out a more precise angular normalization. With this method, a higher precision is obtained for the normalization of the backscattering coefficient at VV polarization during the rainy season, in which the main contribution to the backscatter is attributed to vegetation.
AB - ENVISAT-ASAR acquires data at different incidence angles. For temporal soil and vegetation parameters retrieval it is necessary to normalize theradar data for the angular behavior of the radar backscatter. A simple method for characterizing the angular behavior is by plotting the measurements of the backscattering coefficient during the dry season (stationary target) as a function of the incidence angle and considering that this angular dependence is conserved throughout the rainy season as well. However, this method is not sufficiently precise for data gathered in the rainy season since the scattering mechanisms of the vegetation and soil are different. Instead, we propose the use of a coherent scattering model for vegetation in order to carry out a more precise angular normalization. With this method, a higher precision is obtained for the normalization of the backscattering coefficient at VV polarization during the rainy season, in which the main contribution to the backscatter is attributed to vegetation.
UR - http://www.scopus.com/inward/record.url?scp=39049133594&partnerID=8YFLogxK
U2 - 10.2529/piers050902101901
DO - 10.2529/piers050902101901
M3 - Contribución a la conferencia
AN - SCOPUS:39049133594
SN - 1933077085
SN - 9781933077086
T3 - PIERS 2006 Cambridge - Progress in Electromagnetics Research Symposium, Proceedings
SP - 94
EP - 98
BT - PIERS 2006 Cambridge - Progress in Electromagnetics Research Symposium, Proceedings
PB - Electromagnetics Academy
T2 - Progress in Electromagnetics Research Symposium, PIERS 2006 Cambridge
Y2 - 26 March 2006 through 29 March 2006
ER -