Angle-of-arrival fluctuations in moderate to strong turbulence |
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| Authors: | Ma Jing Gao Chong Tan Li-Ying |
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| Affiliation: | National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | Based on the modified spectrum, the analytic expressions for thevariance and normalized covariance of angle-of-arrival (AOA)fluctuations are presented, which are applicable to the weak andstrong regimes. The experimental data of AOA fluctuations validatethe new derived expressions in weak and strong regimes. The resultsshow that the receiving aperture D, outer scale and cell scalelarger than the scattering disc S contribute significantly to theAOA fluctuations, and contributions from the small-scale turbulenceare negligible. For the case of 4S/Dll 1, the receiving aperturedominates low-pass filtering effects and the new displacementvariances are in good agreement with the results from the old weak-fluctuation theory. For the case of 4S/Dgg 1, the scattering disc dominates the low-passfiltering effects and the new displacement variances depart from theresults from the oldweak-fluctuation theory. |
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| Keywords: | atmospheric optics optical wave propagation angle-of-arrival fluctuations moderate to strong turbulence |
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