Method for Measuring the Second-Order Moment of Atmospheric Turbulence

doi:10.3390/atmos12050564

	Method for Measuring the Second-Order Moment of Atmospheric Turbulence
	Shen, Hong 1; Yu, Longkun 2; Jing, Xu 3; Tan, Fengfu 3
刊名	ATMOSPHERE
	2021-05-01
卷号	12
关键词	adaptive optics atmospheric effects instrumentation site testing
DOI	10.3390/atmos12050564
通讯作者	Yu, Longkun(yulongkun@aiofm.ac.cn)
英文摘要	The turbulence moment of order m (mu(m)) is defined as the refractive index structure constant C-n(2) integrated over the whole path z with path-weighting function z(m). Optical effects of atmospheric turbulence are directly related to turbulence moments. To evaluate the optical effects of atmospheric turbulence, it is necessary to measure the turbulence moment. It is well known that zero-order moments of turbulence (mu(0)) and five-thirds-order moments of turbulence (mu(5/3)), which correspond to the seeing and the isoplanatic angles, respectively, have been monitored as routine parameters in astronomical site testing. However, the direct measurement of second-order moments of turbulence (mu(2)) of the whole layer atmosphere has not been reported. Using a star as the light source, it has been found that mu(2) can be measured through the covariance of the irradiance in two receiver apertures with suitable aperture size and aperture separation. Numerical results show that the theoretical error of this novel method is negligible in all the typical turbulence models. This method enabled us to monitor mu(2) as a routine parameter in astronomical site testing, which is helpful to understand the characteristics of atmospheric turbulence better combined with mu(0) and mu(5/3).
资助项目	National Natural Science Foundation of China[61665004] ; National Natural Science Foundation of China[41605007]
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种	英语
出版者	MDPI
WOS记录号	WOS:000653410300001
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/122197]
专题	中国科学院合肥物质科学研究院
通讯作者	Yu, Longkun
作者单位	1.Jiujiang Univ, Sch Sci, Jiujiang 332005, Peoples R China 2.Nanchang Univ, Informat Engn Sch, Nanchang 330031, Jiangxi, Peoples R China 3.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Atmospher Opt, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Shen, Hong,Yu, Longkun,Jing, Xu,et al. Method for Measuring the Second-Order Moment of Atmospheric Turbulence[J]. ATMOSPHERE,2021,12.
APA	Shen, Hong,Yu, Longkun,Jing, Xu,&Tan, Fengfu.(2021).Method for Measuring the Second-Order Moment of Atmospheric Turbulence.ATMOSPHERE,12.
MLA	Shen, Hong,et al."Method for Measuring the Second-Order Moment of Atmospheric Turbulence".ATMOSPHERE 12(2021).