在地面范围内观测到的辐照度波动的概率密度。

Probability density of irradiance fluctuations observed over terrestrial ranges.

作者信息

Mahon Rita, Moore Christopher I, Burris Harris R, Ferraro Mike, Rabinovich William S, Suite Michel, Thomas Linda M

机构信息

Code 5654, Naval Research Laboratory, Overlook Ave, SW Washington, DC 20375, USA.

出版信息

Appl Opt. 2011 Dec 10;50(35):6476-83. doi: 10.1364/AO.50.006476.

DOI:10.1364/AO.50.006476

PMID:22193124

Abstract

The irradiance fluctuations imposed on a laser beam that has propagated over horizontal terrestrial paths in the range of 2 to 24 km are compared to lognormal (LN) and gamma-gamma (GG) distributions. For the direct links reported here the irradiance fluctuations follow a LN distribution except in cases of weak turbulence, characterized by a scintillation index of less than 1 and a Fried parameter larger than the receiver aperture, in which case the GG distribution gives an improved fit. In very weak turbulence the difference between the two distributions is insignificant.

摘要

将在2至24千米水平地面路径上传播的激光束所受到的辐照度波动与对数正态（LN）分布和伽马-伽马（GG）分布进行比较。对于此处报告的直接链路，除了在弱湍流情况下（以小于1的闪烁指数和大于接收器孔径的弗里德参数为特征）辐照度波动遵循LN分布外，在这种情况下GG分布拟合效果更好。在非常弱的湍流中，两种分布之间的差异不显著。