Mathematics
Scientific paper
Dec 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989rsenv..30..227c&link_type=abstract
Remote Sensing of Environment (ISSN 0034-4257), vol. 30, Dec. 1989, p. 227-237.
Mathematics
4
Geomorphology, Lava, Radar Geology, Radar Scattering, Remote Sensing, Surface Roughness, Mathematical Models, Polarization (Waves), Radar Echoes, Spatial Distribution
Scientific paper
Mapping of spatial variations in surface roughness over large regions is required to understand the nature of volcanic terrains. An invertible scattering model for quad-polarization radar data is presented to assist in the remote-sensing analysis of lava flow surface morphology. This model permits separation of the polarized part of the radar echo into quasispecular, dihedral, and small-perturbation scatterin components, based on an assumed surface dielectric constant. Tests are presented for a quad-pol scene of Craters of the Moon National Monument in Idaho, where there are a number of basaltic lava flows of differing surface morphology. Comparison of calculated model components with the observed morphology of the lava flows suggests that this technique may be useful for the remote description of changes in surface roughness. The scattering mechanisms chosen to represent the polarizing behavior of the real surface display correlations which indicate that they are sensitive to the expected scales of roughness.
Campbell Bruce A.
Mouginis-Mark Peter J.
Zisk Stanley H.
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