Title :
Scattering by densely distributed moderate size particles with size distribution and applications to snow
Author :
Chen, Chi-Te ; Tsang, Leung ; Chang, Alfred T C ; Ding, Kung-Hau
Author_Institution :
Dept. of Electr. Eng., Washington Univ., Seattle, WA, USA
Abstract :
The radiative transfer theory has been used to deal with the problems of remote sensing from scattering media. During the past, the dense media radiative transfer theories are mainly based on the Rayleigh approximation which is only valid in the low-frequency limit when the particle size is much smaller than the wavelength. However, for moderate size particles, higher order multipoles have to be taken into account. In this paper, we derive a QCA-based dense media radiative transfer model. Since the quasicrystalline approximation (QCA) is used, it can be applied to moderate size particles with size distribution. The Mie scattering T-matrix elements for spherical particles are used. After calculating the phase matrix, extinction coefficient and the effective propagation constant by QCA, we use it for dense media radiative transfer theory for inclusion of multiple scattering effects
Keywords :
electromagnetic wave scattering; matrix algebra; microwave propagation; millimetre wave propagation; particle size; radiative transfer; radiometry; remote sensing; snow; 19 GHz; 37 GHz; Mie scattering T-matrix elements; QCA; QCA-based dense media radiative transfer model; densely distributed moderate size particles; effective propagation constant; extinction coefficient; multipoles; phase matrix; quasicrystalline approximation; radiative transfer theory; remote sensing; scattering media; size distribution; snow; spherical particles; Distribution functions; Electromagnetic scattering; Equations; Frequency; Mie scattering; Particle scattering; Quantum cellular automata; Rayleigh scattering; Remote sensing; Snow;
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.1999.771533