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首页> 外文会议>Conference on Laser Weapons technology 24-25 April 2000 Orlando, USA >Analysis of atmospheric effects on stelar scintillation
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Analysis of atmospheric effects on stelar scintillation

机译：大气对石块闪烁的影响分析

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摘要

Atmospheric effects on normalized stellar irradiance fluctuations for the weak fluctuation regime are examined. Both monochromatic and polychromatic effects are considered. Calculations are performed using a Rytov theory which explicitly includes refractive effects aristing from the polychromatic stellar source. The atmospheric turbulence along the path is specified in a spherical shell or "onion-skin" model using a vertical profile specified by either the Clear 1 model or actual thermosonde measurements. Finite optical bandwidth, receiver aperature size, and variable turbulent inner scale are also included. Good agreement is found between ground-based measurements and model results in the weak scintillation regime. It is also shown that refraction effects can significantly alter the wavelength dependence of scintillation as well as produce a leveling off and decrease of scintillation with increasing zenith angle that could be misinterpreted as saturation.
机译：考察了大气对标准波动恒星辐照度波动的影响。同时考虑了单色和多色效果。使用Rytov理论进行计算，该理论明确包括多色恒星源引起的折射效应。使用Clear 1模型或实际热探空仪测量值指定的垂直剖面，可以在球形壳或“洋葱皮”模型中指定沿路径的大气湍流。还包括有限的光带宽，接收器孔径和可变的湍流内部标度。在弱闪烁方案中，地面测量结果与模型结果之间找到了很好的一致性。还表明，折射效应可以极大地改变闪烁的波长依赖性，并随着天顶角的增加而导致闪烁的变平和减少，这可能会被误认为是饱和度。

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