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Title:
Automatic data analysis for the Sky Brightness Monitor
Authors:
Zhao, M. Y.; Liu, Y.; Elmhamdi, A.; Kordi, A. S.; Al-trabulsy, H. A.; Zhang, X. F.; Song, T. F.; Liu, S. Q.; Shen, Y. D.; Tian, Z. J.; Miao, Y. H.
Affiliation:
AA(Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China ), AB(Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China; Department of Physics and Astronomy, King Saud University, PO Box 2455, Riyadh 11451, Saudi Arabia), AC(Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China; Department of Physics and Astronomy, King Saud University, PO Box 2455, Riyadh 11451, Saudi Arabia), AD(Department of Physics and Astronomy, King Saud University, PO Box 2455, Riyadh 11451, Saudi Arabia), AE(Department of Physics and Astronomy, King Saud University, PO Box 2455, Riyadh 11451, Saudi Arabia), AF(Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China), AG(Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China), AH(Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China), AI(Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China), AJ(Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China), AK(Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 443, Issue 3, p.1955-1966 (MNRAS Homepage)
Publication Date:
09/2014
Origin:
OUP
Astronomy Keywords:
atmospheric effects, methods: data analysis, site testing, telescopes, surveys, Sun: general
Abstract Copyright:
2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
DOI:
10.1093/mnras/stu1231
Bibliographic Code:
2014MNRAS.443.1955Z

Abstract

The Sky Brightness Monitor (SBM) is an important instrument for measuring the brightness level for the sky condition, which is a critical parameter when judging a site for solar coronal observations. In this paper, we present an automatic method for processing SBM data in large quantities. This method can separate the regions of the Sun and the nearby sky, as well as recognizing the regions of the supporting arms in the field of view. These processes are implemented on the data acquired by more than one SBM instrument during our site survey project in western China. Applying the result from our processes, an analysis has been carried out for the assessment of the scattered-light levels by the instrument. These results are considerably significant for further investigations and studies, notably to derive a series of other atmospheric parameters, such as extinctions, aerosol content and precipitable water vapour content, that are important for candidate sites. Our processes also provide a possible way for full-disc solar telescopes to track the Sun without an extra guiding system.
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