Approximate scattering phase function fitting method based on particle swarm optimization

Chen Peng; Zhao Jiguang; Du Xiaoping; Song Yishuo

doi:10.3788/IRLA201948.1203005

The scattering phase function is an important parameter for studying the optical transmission characteristics in aerosols. Four approximate scattering phase functions commonly used in Monte Carlo simulations in atmospheric radiation propagation were compared. Aiming at the problem that the parameters of the Two-Term Henyey-Greenstein (TTHG) phase function were difficult to determine, a TTHG scattering phase function based on particle swarm optimization was proposed. This function can well fit the Mie scattering phase function, especially at backscatter angles greater than 90. Compared with the phase functions such as HG, HG* and RHG, the phase function proposed in this paper can better approximate the actual scattering and obtain more accurate Monte Carlo simulation results.

Approximate scattering phase function fitting method based on particle swarm optimization

1. Graduate School,Space Engineering University,Beijing 101416,China;

2. Department of Electronics and Optical Engineering,Space Engineering University,Beijing 101416,China;

3. Aerospace Command College,Space Engineering University,Beijing 101416,China

Received Date: 2019-08-11

Rev Recd Date: 2019-09-21

Publish Date: 2019-12-25

Key words:

Abstract: The scattering phase function is an important parameter for studying the optical transmission characteristics in aerosols. Four approximate scattering phase functions commonly used in Monte Carlo simulations in atmospheric radiation propagation were compared. Aiming at the problem that the parameters of the Two-Term Henyey-Greenstein (TTHG) phase function were difficult to determine, a TTHG scattering phase function based on particle swarm optimization was proposed. This function can well fit the Mie scattering phase function, especially at backscatter angles greater than 90. Compared with the phase functions such as HG, HG* and RHG, the phase function proposed in this paper can better approximate the actual scattering and obtain more accurate Monte Carlo simulation results.

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Reference (13)

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Approximate scattering phase function fitting method based on particle swarm optimization

doi: 10.3788/IRLA201948.1203005

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