Title :
Antenna illumination effects on measurements of rough surface scattering
Author :
Monakov, A.A. ; Vivekanandan, J. ; Nyström, A. ; Stjernman, A.
Author_Institution :
Swedish Inst. of Space Phys., Kiruna, Sweden
Abstract :
An analysis of the effects of the antenna radiation pattern on estimates of the differential scattering coefficient (σ0) of rough surfaces is performed. Kirchhoff´s approximation is used to describe rough surface scattering. A comparison between normalized σ0 derived in the cases of plane wave illumination (pencil beam antenna) and spherical wave illumination (generalized Gaussian beam antenna) is made. Sensitivity of the differential scattering coefficient with regards to the antenna radiation pattern is studied
Keywords :
antenna radiation patterns; backscatter; electromagnetic wave scattering; radar cross-sections; Kirchhoff´s approximation; antenna radiation pattern; differential scattering coefficient; generalized Gaussian beam antenna; illumination effects; pencil beam antenna; plane wave illumination; rough surface scattering; spherical wave illumination; Antenna measurements; Antenna radiation patterns; Directional antennas; Kirchhoff´s Law; Lighting; Pattern analysis; Performance analysis; Rough surfaces; Scattering; Surface roughness;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1993. IGARSS '93. Better Understanding of Earth Environment., International
Conference_Location :
Tokyo
Print_ISBN :
0-7803-1240-6
DOI :
10.1109/IGARSS.1993.322534
