风积新月形沙丘的电磁散射特性分析

doi:10.3969/j.issn.1001-2400.2013.06.023

Abstract

Abstract:

A barchan model is simulated by the theory of wind-blown sand dunes. Using the Kirchhoff Approximation based on the discrete element method, electromagnetic scattering coefficients are calculated for the cases of incident wave impinges on the single sand dune along the up-wind slope, the lee slope and the two-side slope face direction, respectively. A comparison of the backscattering coefficients and bistatic scattering coefficients for the four incident directions are made. Numerical results show that co-polarized backscattering coefficients of the lee slope have a local peak value when the incident angle is equal to the repose angle. Cross-polarized bistatic coefficient of the lee slope near the backscattering region is enhanced when the incident angle approaches the repose angle. Bistatic scattering coefficients of two-side slope faces have symmetry with respect to the azimuth angle in the incident plane.

Key words: barchans, up-wind slope, lee slope, electromagnetic scattering

CLC Number:

O441.4 P931.3

References

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Analysis of electromagnetic scattering from the wind-blown barchan

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