Title :
Polarimetric multi-angular Radarsat-2 data sensitivity to surface parameters
Author :
Wang, Hongquan ; Allain, Sophie ; Méric, Stéphane ; Pottier, Eric
Author_Institution :
SAPHIR Team, Inst. of Electron. & Telecommun. of Rennes (IETR), Rennes, France
Abstract :
The objective of this study is to evaluate the potential of C-band polarimetric multi-angular Radarsat-2 datasets to characterize soil moisture and surface roughness over bare agricultural fields. The polarimetric parameters derived from single angular and dual angular SAR data are examined to analyze the polarimetric sensitivities to bare surfaces. In the case of single angular analysis, the results show that smooth surfaces can be separated from medium rough as well as rough surfaces. Polarimetric parameters SRalpha1, ρhhvv have potentials to characterize soil moisture. In the case of dual angular analysis, the backscattering coefficient differences between two incidence angles Δσ in HH and VV polarization depend negatively on surface roughness and positively on soil moisture.
Keywords :
geophysical techniques; remote sensing by radar; soil; synthetic aperture radar; C-band polarimetric multiangular Radarsat-2 datasets; HH polarization; SRalpha1 polarimetric parameters; VV polarization; agricultural fields; backscattering coefficient; bare surfaces; dual angular SAR data; dual angular analysis; polarimetric multiangular Radarsat-2 data sensitivity; polarimetric parameters; polarimetric sensitivities; single angular SAR data; single angular analysis; smooth surfaces; soil moisture; surface roughness; Backscatter; Rough surfaces; Sensitivity; Soil moisture; Surface roughness; Synthetic aperture radar; Radarsat-2; bare surface; multi-angular; polarimetric SAR; sensitivity analysis;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2012 IEEE International
Conference_Location :
Munich
Print_ISBN :
978-1-4673-1160-1
Electronic_ISBN :
2153-6996
DOI :
10.1109/IGARSS.2012.6352457