17 November 2000 Effects of nonuniform wind on the arrival angle temporal power spectra of spherical wave
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Abstract
The effects of non-uniform wind on the arrival angle temporal power spectrum of the spherical wave are numerically calculated and analyzed by using analytical formulae in Rytov approximation. The finite outer and inner scale is also included in the formulae by using modified Von-Karman spectrum of the turbulence. The results show that the non-uniform wind velocity through the propagation path will induce much change in line shape of the power spectrum. There are three scaling regions in arrival angle power spectrum of a spherical wave from Rayleigh star, which are proportional to f2/3, f5/3, f10/3 (or f11/3), respectively. In some conditions (small averaged wind velocity, relative larger random wind in horizontal propagation path near the ground), the power spectrum of spherical-wave is approximately proportional to f-8/3 in much wider frequency region, rather than f-11/3 as in uniform wind condition.
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Yingjian Wang, Chengyu Fan, Xiaoqing Wu, Jie Zhan, Zhiben Gong, "Effects of nonuniform wind on the arrival angle temporal power spectra of spherical wave", Proc. SPIE 4125, Propagation and Imaging through the Atmosphere IV, (17 November 2000); doi: 10.1117/12.409290; https://doi.org/10.1117/12.409290
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