New airborne imaging radar observations of sand Dunes: Kelso Dunes, California
1992; Elsevier BV; Volume: 39; Issue: 3 Linguagem: Inglês
10.1016/0034-4257(92)90088-2
ISSN1879-0704
AutoresNicholas Lancaster, L. R. Gaddis, R. Greeley,
Tópico(s)Geology and Paleoclimatology Research
ResumoHigh resolution multiple wavelength and polarization radar data of Kelso Dunes were acquired during the Mojave Field Experiment. They offer the opportunity to develop criteria for the selection of optimal wavelengths and polarizations for imaging of dune areas. The backscatter from unvegetated dune surfaces at all wavelenghts (C-, L-, and P-band) with direct (HH, VV) polarization is largely controlled by dune topography and incidence angle. These data (especially P-band) provide the best images of dune topography. The best discrimination between active and inactive dunes is obtained by cross-polarized C-band data (CVH, CHV) as a result of multiple scattering from vegetation and small-scale topography (e.g., shadow dunes).
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