Title :
Wave scattering from a lossy dielectric rough surface using PBTG-BMIA/CAG and applications to passive remote sensing
Author :
Li, Qin ; Chan, Chi Hou ; Tsang, Leung ; Zhang, Guifu
Author_Institution :
Dept. of Electr. Eng., Washington Univ., Seattle, WA, USA
Abstract :
Wave scattering from a lossy dielectric rough surface is studied. Based on the fact that Green´s function of the air region is slowly varying compared to that in a lower medium and Green´s function in a lossy medium is attenuative, a physics-based two-grid method (PBTG) was developed. To facilitate computation, the method is combined with the banded-matrix iterative approach/canonical grid (BMIA/CAG) method. Applying this method, bistatic scattering coefficients and emissivities are calculated. The results show good agreement in comparison with that of using a single dense grid
Keywords :
geophysical techniques; radiometry; remote sensing; EM wave scattering; Green´s function; PBTG BMIA CAG; banded-matrix iterative approach; bistatic scattering coefficient; canonical grid; emissivity; geophysical measurement technique; land surface; lossy dielectric rough surface; microwave radiometry; passive remote sensing; physics-based two-grid method; remote sensing; terrain mapping; Brightness temperature; Dielectric losses; Electromagnetic scattering; Green´s function methods; Ocean temperature; Remote sensing; Rough surfaces; Sea surface; Surface roughness; Surface waves;
Conference_Titel :
Geoscience and Remote Sensing Symposium Proceedings, 1998. IGARSS '98. 1998 IEEE International
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-4403-0
DOI :
10.1109/IGARSS.1998.691506
