Title :
Radar backscatter characteristics of trees at 215 GHz
Author :
Narayanan, Ram Mohan ; Borel, Christoph C. ; McIntosh, Robert E.
Author_Institution :
Dept. of Electr. & Comput. Eng., Massachusetts Univ., Amherst, MA, USA
fDate :
5/1/1988 12:00:00 AM
Abstract :
Millimeter-wave backscatter measurements are presented for various tree types taken during the 1987 growing season at Amherst, Massachusetts. These measurements were taken with a 215-GHz radar system that is capable of measuring backscatter for the VV (vertical transmit, vertical received), HH (horizontal transmit, horizontal received), VH, and HV polarizations. Geometrical optics modeling was used for the normalized radar cross section (RCS) of deciduous trees and the backscatter is shown to be characterized in terms of gravimetric leaf water content, the leaf area, and the foilage crown cover. Data are also provided for coniferous trees, although the geometrical optics model is not applicable in those cases
Keywords :
geophysical techniques; radar applications; remote sensing; 215 GHz; AD 1987; Amherst; EHF; HH; HV polarizations; Massachusetts; USA; United States; VH; VV; coniferous; deciduous trees; foilage crown cover; forest; geometrical optics model; land surface; leaf area; leaf water content; microwave; mm wave; radar backscatter; radar cross section; radar echo; radiowave reflection; tree; vegetation; Backscatter; Electromagnetic scattering; Geometrical optics; Millimeter wave measurements; Millimeter wave propagation; Millimeter wave radar; Optical polarization; Optical scattering; Radar cross section; Radar measurements; Radar scattering; Solid modeling; Wavelength measurement;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
