对流层雷达测量中的普遍波动
Universal fluctuations in tropospheric radar measurements
摘要：
在特意安排的实验设施中收集的雷达数据表明，大气湍流的足迹可能被编码在雷达信号统计中。计算了雷达数据的概率分布，并用一个单参数的广义Gumbel（GG）分布族G（a）进行了很好的拟合。获得了风强度与实测形状参数a之间的关系。强风波动返回明显的不对称尖峰剖面，而高斯剖面最终恢复为风波动减少。除了强调空气湍流对雷达应用的重要影响外，我们还证实了G（a）统计量对高度相关的复杂系统的充分性。
英文摘要：
Radar data collected at an experimental facility arranged on purpose suggest that the footprint of atmospheric turbulence might be encoded in the radar signal statistics. Radar data probability distributions are calculated and nicely fitted by a one parameter family of generalized Gumbel (GG) distributions, G(a). A relation between the wind strength and the measured shape parameter "a" is obtained. Strong wind fluctuations return pronounced asymmetric leptokurtic profiles, while Gaussian profiles are eventually recovered as the wind fluctuations decrease. Besides stressing the crucial impact of air turbulence for radar applications, we also confirm the adequacy of G(a) statistics for highly correlated complex systems.
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