Title :
Study of Emission from Finite-Size Objects using FDTD
Author :
Camacho, Luis M. ; Lu, Mingyu ; Tjuatja, Saibun
Author_Institution :
Dept. of Electr. Eng., Univ. of Texas at Arlington, Arlington, TX
Abstract :
A 3D-FDTD algorithm is developed and used to compute the emissivity of finite-size and arbitrary-shape objects. Under thermal equilibrium, the emissivity of an object is the same as its absorptivity. The absorptivity is a function of both the scattering cross section and the absorption cross section of the object; in this study, these cross sections were computed using the FDTD approach. Emissivity values for spherical, cylindrical and landmine-like objects as function of observation angle, polarization and permittivity are generated and presented in this paper.
Keywords :
buried object detection; electromagnetic wave absorption; electromagnetic wave scattering; emissivity; finite difference time-domain analysis; geophysical techniques; remote sensing; 3D FDTD; absorption cross section; absorptivity function; cylindrical objects; emissivity computation; finite size arbitrary shaped objects; finite size object emission; landmine like objects; observation angle; permittivity; polarization; scattering cross section; spherical objects; thermal equilibrium; Absorption; Dielectrics; Electromagnetic scattering; Electromagnetic wave polarization; Equations; Finite difference methods; Permittivity; Remote sensing; Shape; Time domain analysis; Emission; FDTD Methods; Polarimetry; Remote Sensing;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2008. IGARSS 2008. IEEE International
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-2807-6
Electronic_ISBN :
978-1-4244-2808-3
DOI :
10.1109/IGARSS.2008.4779932
