Experimental investigation of the outer scale in atmospheric optical turbulence near the ground
文献类型：期刊论文
| 作者 | Wang Qian1,2; Mei Hai-Ping1 ; Qian Xian-Mei1; Rao Rui-Zhong1
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| 刊名 | ACTA PHYSICA SINICA
 |
| 出版日期 | 2015-11-20 |
| 卷号 | 64期号:22页码:1-7 |
| 关键词 | Atmospheric Optical Turbulence Spatial Correlation Function Outer Scale |
| DOI | 10.7498/aps.64.224216 |
| 文献子类 | Article |
| 英文摘要 | In this article, the Von-Karman model of turbulence spatial correlation function which contains the parameter of outer scale is analyzed. Then, the experimental data of air refractive index variation obtained from a high quality fiber optical turbulence sensing array are used to evaluate the outer scale of atmospheric optical turbulence as well as its diurnal variation through the algorithm of nonlinear fitting. The results validate the suitability of the Von-Karman model. By combining the theory of correlation function with the spatially distributed and simultaneously measured data, three kinds of turbulence spatial scales described by correlation function are revealed as clearly as possible. Results show that the values of outer scale in atmospheric optical turbulence 1.8 m above the grassland tend to be larger in the daytime and smaller in the night. The mean value around noon is 0.44 m, while in the night it becomes 0.3 m. Here, three of the important views should be noted. Firstly, when the displacement of two points is just equal to the outer scale, their correlation coefficient is 0.26, and when it exceeds the outer scale, there is still a certain value of correlation coefficient. Secondly, the integral scale represents the averaged value of scale in the vortex of optical turbulence. And, it is slightly smaller than the outer scale. Thirdly, when the distance of two points equals the biggest scale of vortex in optical turbulence, the correlation coefficient tends to zero, and the value of biggest scale is slightly bigger than the outer scale. It is easy to find that the diurnal variation tendencies of the three spatial scales are similar to that of intensity in optical turbulence. The method of obtaining the characteristic scales by spatially arranged and simultaneously measured optical turbulence is direct, and the results can be considered as the evidence to prove the models of correlation function including the Von-Karman model. So, it promotes the research on the property of spatial structure to a certain extent. |
| WOS关键词 | INDEX |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000368824600025 |
| 资助机构 | National Natural Science Foundation of China(41205010) ; National Natural Science Foundation of China(41205010) ; National Natural Science Foundation of China(41205010) ; National Natural Science Foundation of China(41205010) ; National Natural Science Foundation of China(41205010) ; National Natural Science Foundation of China(41205010) ; National Natural Science Foundation of China(41205010) ; National Natural Science Foundation of China(41205010) ; National Natural Science Foundation of China(41205010) ; National Natural Science Foundation of China(41205010) ; National Natural Science Foundation of China(41205010) ; National Natural Science Foundation of China(41205010) ; National Natural Science Foundation of China(41205010) ; National Natural Science Foundation of China(41205010) ; National Natural Science Foundation of China(41205010) ; National Natural Science Foundation of China(41205010) |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/22267]  |
| 专题 | 合肥物质科学研究院_中科院安徽光学精密机械研究所 |
| 作者单位 | 1.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Atmospher Composit & Opt Radiat, Hefei 230031, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang Qian,Mei Hai-Ping,Qian Xian-Mei,et al. Experimental investigation of the outer scale in atmospheric optical turbulence near the ground[J]. ACTA PHYSICA SINICA,2015,64(22):1-7. |
| APA | Wang Qian,Mei Hai-Ping,Qian Xian-Mei,&Rao Rui-Zhong.(2015).Experimental investigation of the outer scale in atmospheric optical turbulence near the ground.ACTA PHYSICA SINICA,64(22),1-7. |
| MLA | Wang Qian,et al."Experimental investigation of the outer scale in atmospheric optical turbulence near the ground".ACTA PHYSICA SINICA 64.22(2015):1-7. |
入库方式： OAI收割
来源：合肥物质科学研究院
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