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A modified S-DIMM plus : applying additional height grids for characterizing daytime seeing profiles
Zhiyong Wang1,2,3; Lanqiang Zhang1,2; Lin Kong1,2; Hua Bao1,2; Youming Guo1,2; Xuejun Rao1,2; Libo Zhong1,2; Lei Zhu1,2; Changhui Rao1,2
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume478Issue:2Pages:1459-1467
2018-08-01
Language英语
ISSN0035-8711
DOI10.1093/mnras/sty1097
Indexed BySCI
WOS IDWOS:000439547400003
SubtypeJ
AbstractCharacterization 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.
Keywordinstrumentation: adaptive optics atmospheric effects Sun: granulation
WOS KeywordADAPTIVE OPTICS ; ALTITUDE ; RESOLUTION ; TELESCOPE ; SLODAR ; LAYER
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Document Type期刊论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/9314
Collection自适应光学技术研究室(八室)
Affiliation1.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
Recommended Citation
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.
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