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Proceedings Paper

Influence of phase function approximation on the scattering intensity calculation
Author(s): Shuang Luo; Qiu Yin
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Paper Abstract

In this paper, delta-M and delta-fit approximation methods for the scattering phase function in a radiative-transfer equation are reviewed. Radiance in different streams was calculated by a discrete-ordinate algorithm, and the single-variate factor method was used to investigate the influence of phase-function expansion terms on the scattering intensity. The radiance obtained by the delta-M and delta-fit methodologies was compared and discussed under different optical-depth conditions. The results show that, from the aspect of relative error, these two methods come close to standard intensity as optical depth increases, and the bias error of delta-fit is always smaller than that of delta-M for a fixed optical thickness. Delta-fit does well for all of optical depths, whereas delta-M is only good for thick optical depth. From the aspect of absolute error, delta-M is better than delta-fit under small optical depth, whereas the reverse is true when the optical depth is large.

Paper Details

Date Published: 8 October 2015
PDF: 7 pages
Proc. SPIE 9678, AOPC 2015: Telescope and Space Optical Instrumentation, 967806 (8 October 2015); doi: 10.1117/12.2197394
Show Author Affiliations
Shuang Luo, Shanghai Ctr. for Satellite Remote Sensing (China)
Qiu Yin, Shanghai Ctr. for Satellite Remote Sensing (China)

Published in SPIE Proceedings Vol. 9678:
AOPC 2015: Telescope and Space Optical Instrumentation
Bin Xiangli; Dae Wook Kim; Suijian Xue, Editor(s)

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