大气温度起伏谱的测量
Measurements of the spectrum of atmospheric temp erature fluctuations
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摘要: 用直径1μm和10μm金属丝分别测量了大气温度起伏功率谱，提出了测量湍流外尺度的方法。实测结果表明：在复杂的光传输路径上至少有50%的温度谱不符合Kolmogorov的－5/3定律；用直径1μm丝进行单点测量的C2n和直径10μm丝进行双点测量的C2n较为一致；80%的外尺度不超过7m。Abstract: The spectrum of temperature fluctuations have been measured by 1m m and 10m m diameter wires. A method for measuring outer scale is presented. The results of measurement show that at least 50% temperature spectra deviate from kolmogorov's “－5/3 low” over complex terrain. The results measured by a single sensor and a couple of sensors respectively agree well with each other. 80% of the outer scales are less than 7 meters.
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