Title :
Soil surface backscatter model using FDTD method
Author :
Zhuang, Yan ; Colpitts, Bruce G.
Author_Institution :
Dept. of Electr. & Comput. Eng., New Brunswick Univ., Fredericton, NB, Canada
Abstract :
The effect of inhomogeneous soil properties, such as wetting and drying fronts, on backscattering behaviour is examined. A FDTD model is developed to simulate the electromagnetic backscattering by a random three-dimensional soil surface excited by a sinusoidal plane wave of 5.3 GHz. The total-field/scattered-field formulation is used along with Berenger´s (1994) perfectly matched layer (PML). A number of three-dimensional random surfaces with known surface statistical properties are generated and computed to obtain the value of the backscattering coefficient. The FDTD results are compared with existing theoretical and empirical models
Keywords :
backscatter; electromagnetic wave scattering; finite difference time-domain analysis; moisture; random media; remote sensing by radar; soil; 5.3 GHz; FDTD method; drying fronts; electromagnetic backscattering; inhomogeneous soil properties; perfectly matched layer; random three-dimensional soil surface; scattered-field formulation; sinusoidal plane wave; soil surface backscatter model; surface statistical properties; three-dimensional random surfaces; total-field formulation; wetting front; Backscatter; Computational modeling; Electromagnetic modeling; Electromagnetic scattering; Finite difference methods; Perfectly matched layers; Random number generation; Soil properties; Surface waves; Time domain analysis;
Conference_Titel :
Electrical and Computer Engineering, 1998. IEEE Canadian Conference on
Conference_Location :
Waterloo, Ont.
Print_ISBN :
0-7803-4314-X
DOI :
10.1109/CCECE.1998.685598
