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首页> 外文会议>Free-Space Laser Communications VI >Atmospheric Turbulence Measurements over Desert site using ground-based instruments, kite/tethered-blimp platform and aircraft relevant to optical communications and imaging systems: Preliminary Results
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Atmospheric Turbulence Measurements over Desert site using ground-based instruments, kite/tethered-blimp platform and aircraft relevant to optical communications and imaging systems: Preliminary Results

机译：使用与光学通信和成像系统相关的地面仪器，风筝/系绳飞艇平台和飞机在沙漠地区进行大气湍流测量：初步结果

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摘要

New results of the (temperature) refractive index structure parameter (C_T~2), C_n~2 are presented from fast response sensor observations near the ground and also using a kite/tethered blimp platform and an aircraft, at the Edward Air Force Base in Mojave Desert, California. Additional optical measurements include near-ground scintillation observations over horizontal paths. Atmospheric turbidity were also calculated from direct beam solar radiation measurements using pyrheliometer. Comparisons were made of the observed profiles of refractive index structure parameters (C_n~2) with theoretical modeled profiles, and two derived quantities such as transverse coherence length (r_0) and isoplanatic angle (θ_0) for a slant path are discussed. All of these parameters are the major indicators of turbulence and are important to design an aircraft or space-craft-based free-space laser communication and high resolution optical synthetic-aperture imaging systems. Non-isotropic turbulence observations from some of the data will be pointed out. Probability density functions (PDF) of the distribution of C_n~2 will be described using histograms. Fundamental limits imposed by atmospheric effects in high data rate communication and optical synthetic-aperture imaging systems will be discussed.
机译：（温度）折射率结构参数（C_T〜2），C_n〜2的新结果来自于地面附近的快速响应传感器观测，还使用了位于美国爱德华空军基地的风筝/系绳飞艇平台和飞机加利福尼亚莫哈韦沙漠。其他光学测量包括在水平路径上的近地闪烁观测。大气浊度也通过使用日射强度计从直接光束太阳辐射测量中计算得出。将观察到的折射率结构参数（C_n〜2）的轮廓与理论建模轮廓进行了比较，并讨论了两个导出的量，例如倾斜路径的横向相干长度（r_0）和等平面角（θ_0）。所有这些参数都是湍流的主要指标，对于设计基于飞机或航天器的自由空间激光通信和高分辨率光学合成孔径成像系统非常重要。将指出一些数据的非各向同性湍流观测结果。将使用直方图描述C_n〜2分布的概率密度函数（PDF）。将讨论高数据速率通信和光学合成孔径成像系统中大气效应所施加的基本限制。

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