A modified S-DIMM plus : applying additional height grids for characterizing daytime seeing profiles

doi:10.1093/mnras/sty1097

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	A modified S-DIMM plus : applying additional height grids for characterizing daytime seeing profiles
	Zhiyong Wang 1,2,3; Lanqiang Zhang 1,2; Lin Kong 1,2; Hua Bao 1,2; Youming Guo 1,2; Xuejun Rao 1,2; Libo Zhong 1,2; Lei Zhu 1,2; Changhui Rao 1,2
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2018-08-01
卷号	478 期号:2 页码:1459-1467
关键词	instrumentation: adaptive optics atmospheric effects Sun: granulation
ISSN号	0035-8711
DOI	10.1093/mnras/sty1097
文献子类	J
英文摘要	Characterization of daytime atmospheric turbulence profiles is needed for the design of a multi-conjugate adaptive optical system. S-DIMM+ (solar differential image motion monitor+) is a technique to measure vertical seeing profiles. However, the number of height grids will be limited by the lenslet array of the wide-field Shack-Hartmann wavefront sensor (SHWFS). A small number of subaperture lenslet arrays will lead to a coarse height grid over the atmosphere, which can result in difficulty in finding the location of strong-turbulence layers and overestimates of the turbulence strength for the measured layers. To address this problem, we propose a modified S-DIMM+ method to measure seeing profiles iteratively with decreasing altitude range for a given number of height grids; finally they will be combined as a new seeing profile, with a denser and more uniform distribution of height grids. This method is tested with simulations and recovers the input height and contribution perfectly. Furthermore, this method is applied to the 102 data-sequences recorded from the 1-m New Vacuum Solar Telescope at Fuxian Solar Observatory, 55 of which were recorded at local time between 13:40 and 14:35 on 2016 October 6, and the other 47 between 12:50 and 13:40 on 2017 October 5. A 7x7 lenslet array of SHWFS is used to generate a 16-layer height grid to 15 km, each with 1 km height separation. The experimental results show that the turbulence has three origins in the lower (0-2 km) layers, the higher (3-6 km) layers and the uppermost (>= 7 km) layers.
WOS关键词	ADAPTIVE OPTICS ; ALTITUDE ; RESOLUTION ; TELESCOPE ; SLODAR ; LAYER
语种	英语
WOS记录号	WOS:000439547400003
内容类型	期刊论文
源URL	[http://ir.ioe.ac.cn/handle/181551/9314]
专题	光电技术研究所_自适应光学技术研究室（八室）
作者单位	1.The Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, PO Box 350, Shuangliu, Chengdu 610209, Sichuan, China; 2.The Laboratory on Adaptive Optics, Institute of Optics and Electronics, Chinese Academy of Sciences, PO Box 350, Shuangliu, Chengdu 610209, Sichuan, China; 3.University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, China
推荐引用方式 GB/T 7714	Zhiyong Wang,Lanqiang Zhang,Lin Kong,et al. A modified S-DIMM plus : applying additional height grids for characterizing daytime seeing profiles[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,478(2):1459-1467.
APA	Zhiyong Wang.,Lanqiang Zhang.,Lin Kong.,Hua Bao.,Youming Guo.,...&Changhui Rao.(2018).A modified S-DIMM plus : applying additional height grids for characterizing daytime seeing profiles.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,478(2),1459-1467.
MLA	Zhiyong Wang,et al."A modified S-DIMM plus : applying additional height grids for characterizing daytime seeing profiles".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 478.2(2018):1459-1467.