Dr. Dong Chen Profile

Dr. Dong Chen

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Publications (2)

Proceedings Article | 4 May 2010 Paper

Analysis of the characteristics of atmospheric turbulence in marine surface of South China Sea based on the routine meteorology factors

Dong Chen

Proceedings Volume 7685, 76850T (2010) https://doi.org/10.1117/12.849687

KEYWORDS: Atmospheric turbulence, Oceanography, Meteorology, Turbulence, Humidity, Environmental sensing, Temperature metrology, Water, Factor analysis, Statistical analysis

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Proceedings Article | 29 August 2009 Paper

Research on the influence of optical properties of atmosphere to laser engineering application based on statistical characterization

Dong Chen, Bi-sheng Zhang, Yin-bo Huang, Rui-zhong Rao

Proceedings Volume 7382, 73823F (2009) https://doi.org/10.1117/12.835527

KEYWORDS: Atmospheric optics, Atmospheric particles, Optical properties, Laser engineering, Atmospheric propagation, Statistical analysis, Atmospheric propagation engineering, Absorption, Aerosols, Molecules

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The complexity of the optical properties of atmosphere demonstrated in spatial and temporal characteristics causing the effect of optical properties on laser engineering could not be determined simply. It is necessary to reproduce the panorama of optical properties of atmosphere, and in this case the effect of optical properties on laser engineering could be evaluated. The survey of optical properties of atmosphere is continuous; facing zillions of data that changed instantaneously, the statistical method must be used while the original characteristic of optical properties of atmosphere in spatial and temporal distribution should be restored. Measurements of laser beam propagation in the atmosphere are taken. the wavelength is 0.946 μm and the transmission length is 2 kilometers. The data we achieved were made an hourly average, and then the same parameter based on each hour were made a monthly average, in this sense each parameter has 288 groups of data; the annual statistical characteristic value of different optical properties including atmospheric temperature, humidity, wind speed, visibility and the refractive-index structure parameter C²_N were obtained. The molecular absorption, the aerosol particle scattering and extinction, the turbulence effects and the comprehensive effect of light propagation in the atmosphere were analyzed and evaluated for the atmospheric conditions in the whole year by using this method. The distribution and statistical characteristics of effects of atmosphere optical properties on the propagation were carried out. Analysis results show that, thorough understanding of the atmospheric optical properties in the application areas is very important to all kinds of laser engineering, including feasibility analysis of laser engineering, optical system design and performance evaluation. And statistical analysis method is an effective means to master the characteristics of complex system. It turns out that the effects of optical properties of atmosphere on the laser engineering is complicated and various, and a statistical method for a study of the analysis of the complex spatial and temporal distribution characteristics value is presented meanwhile.

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