Title :
VHF SAR models and measurements of targets under coniferous forest canopies
Author :
Smith, Gary ; Ulande, Lars M H ; Luo, Xianyun ; Martin, Torleif
Author_Institution :
Dept. of Radio & Space Sci., Chalmers Univ. of Technol., Goteborg, Sweden
Abstract :
Measurements of attenuation in the VHF-band through coniferous forests in southwest Sweden are presented, indicating that the forest canopy causes a loss of about 1.5 dB, irrespective of stem volume (from 270 to 460 m3/ha). The variation of attenuation with frequency and polarisation has also been investigated, and found to be in line with predictions using Foldy´s approximation for the mean field, i.e. the attenuation due to scattering loss from trunks is higher for vertical than horizontal polarisation, and increases with frequency
Keywords :
geophysical techniques; radar imaging; radar theory; remote sensing by radar; synthetic aperture radar; terrain mapping; Foldy´s approximation; SAR; Sweden; VHF; attenuation; coniferous forest; forest; forestry; frequency dependence; geophysical measurement technique; land surface; model; polarisation; radar imaging; radar remote sensing; scattering loss; synthetic aperture radar; terrain mapping; tree trunk; vegetation canopy; Attenuation measurement; Backscatter; Biomass; Broadband antennas; Frequency; Image analysis; Polarization; Radar scattering; Space technology; Synthetic aperture radar;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2000. Proceedings. IGARSS 2000. IEEE 2000 International
Conference_Location :
Honolulu, HI
Print_ISBN :
0-7803-6359-0
DOI :
10.1109/IGARSS.2000.857998
