Title :
3-D target electromagnetic modelling for SAR applications
Author :
Wong, C.Y. ; Zhang, C.B. ; Yeo, T.S. ; Lu, Y.H.
Author_Institution :
Dept. of Electr. Eng., Nat. Univ. of Singapore, Singapore
Abstract :
A 3-D target is modelled by multiple scatterers on its surface. The back-scattering of each of the scatterers is calculated and used to scale the return signals at the antenna receiver. Speckle is modelled as a multi-scattering centre within one resolution cell. A resolution cell is divided into several smaller facets which are Gaussian randomly tilted and the back-scattering calculated and summed within that resolution cell. The 3-D SAR raw data are obtained by vector summation of the scatterers. Simulations are carried out using several target models e.g. a flat plane, a box on a flat plane, and a communication antenna on a flat plane and the results are found to be satisfactory. The SAR return signal and subsequently the SAR image generated uses the Range Migration Algorithm (RMA)
Keywords :
radar imaging; radar theory; remote sensing by radar; synthetic aperture radar; 3D SAR raw data; 3D target EM modelling; Gaussian randomly tilted facets; Range Migration Algorithm; SAR applications; SAR image; SAR return signal; antenna receiver; backscattering; box; communication antenna; flat plane; multiple scatterers; multiscattering centre; resolution cell; speckle model; terrain model; vector summation; Computational modeling; Electromagnetic modeling; Electromagnetic reflection; Electromagnetic scattering; Facsimile; Radar antennas; Radar imaging; Radar scattering; Receiving antennas; Synthetic aperture radar;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1999. IGARSS '99 Proceedings. IEEE 1999 International
Conference_Location :
Hamburg
Print_ISBN :
0-7803-5207-6
DOI :
10.1109/IGARSS.1999.774642
