Title :
Modelling of VHF radar backscattering from forests based on radiative transfer
Author :
Israelsson, Hans ; Askne, Jan ; Ulander, Lars
Author_Institution :
Dept. of Radio & Space Sci., Chalmers Univ. of Technol., Goteborg, Sweden
Abstract :
The CARABAS system is a wide band SAR, that operates at VHF frequencies (20-90 MHz). The image information includes a higher dynamic range in the radar backscattering from forested areas of varying stem volume, than what has been found using conventional microwave SAR. A modified MIMICS model has been used to model the radar backscattering at VHF. The various terms in the solution have been added coherently, taking the variation with height above ground and the phase shift of the ground reflection into account. The results show an improved agreement with measured data
Keywords :
backscatter; electromagnetic wave scattering; forestry; geophysical techniques; radar cross-sections; radar theory; remote sensing by radar; synthetic aperture radar; 20 to 90 MHz; CARABAS; MIMICS model; VHF; backscatter; forest; forestry; geophysical measurement technique; radar backscattering; radar scattering; radiative transfer theory; synthetic aperture radar; vegetation mapping; wide band SAR; Backscatter; Biomass; Dynamic range; Microwave frequencies; Radar imaging; Radar scattering; Space technology; Synthetic aperture radar; Telephony; Wideband;
Conference_Titel :
Geoscience and Remote Sensing, 1997. IGARSS '97. Remote Sensing - A Scientific Vision for Sustainable Development., 1997 IEEE International
Print_ISBN :
0-7803-3836-7
DOI :
10.1109/IGARSS.1997.615261
