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Spatial And Temporal Behavior Of Microwave Backscatter Directional Modulation Over The Saharan Ergs, David G. Long, Haroon Stephen
Spatial And Temporal Behavior Of Microwave Backscatter Directional Modulation Over The Saharan Ergs, David G. Long, Haroon Stephen
Faculty Publications
Radar backscatter (σ˚) from ergs is modulated with view direction [incidence (θ) and azimuth (φ) angles], where the modulation characteristics reflect the surface geometry. σ˚ also varies spatially and reflects the spatial inhomogeneity of the sand surface. We use σ˚ measurements at different θ and φ angles from the NASA, European Remote Sensing satellite, and SeaWinds scatterometers to understand the relationship between wind and erg bedforms. A model incorporating the σ˚ φ-modulation and spatial inhomogeneity is proposed. Surface slope variations are related to the σ˚ spatial inhomogeneity. We compare the backscatter model results with numerically predicted wind direction data provided …