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Using a New Sky Brightness Monitor to Observe the Annular Solar Eclipse on 15 January 2010
Liu Y(刘煜); Shen YD(申远灯); Zhang XF(张雪飞); Liu NP(刘念平); Liu, Y (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Astron Observ, Kunming 650011, Peoples R China.
发表期刊SOLAR PHYSICS
2012-08
卷号279期号:2页码:561-572
DOI10.1007/s11207-012-0012-y
产权排序第1完成单位
收录类别SCI
关键词Atmospheric Extinction Earth's Atmosphere Instrumental Effects
摘要For the future development of Chinese Giant Solar Telescope (CGST) in Western China, a new sky brightness monitor (SBM) has been produced for the site survey for CGST. To critically examine the performance and sensitivity of SBM, we used it in the observation of the annular solar eclipse in Dali City, Yunnan, on 15 January 2010. The observation met good weather conditions with an almost clear sky during the eclipse. The SBM measurement translates into the solar illuminance changes at a level of 2.4x10(-4) I s(-1) during the eclipse. The time of the minimal sky brightness in the field of view (FOV) is found consistent with the time of maximum eclipse. Two local sky regions in the FOV are chosen to make a time series of the calibrated skylight profiles. The evolution of the sky brightness thus calibrated also shows good consistency with the eclipse, particularly between the second and the third contacts. The minimal sky brightness in each local sky region took place within half a minute from the corresponding predicted contact time. Such small time delays were mainly caused by occasional cirri. The minimal sky brightness measured during the eclipse is a few millionths of I (aS (TM)) with standard deviation of 0.11 millionths of I (aS (TM)). The observation supports that the single-scattering process (optically thin conditions) is the main contributor to the atmospheric scattering. We have demonstrated that many important aerosol optical parameters can be deduced from our data. We conclude that the new SBM is a sensitive sky photometer that can be used for our CGST and coronagraph site surveys.
项目资助者Natural Science Foundation of China [10933003, 11078004, 11073050] ; National Key Research Science Foundation [MOST 2011CB811400]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0038-0938
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归档日期2012-12-11
WOS记录号WOS:000306440800015
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/7180
专题选址与日冕观测组
通讯作者Liu, Y (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Astron Observ, Kunming 650011, Peoples R China.
作者单位National Astronomical Observatories/Yunnan Astronomical Observatory, CAS, Kunming, 650011, China
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Liu Y,Shen YD,Zhang XF,et al. Using a New Sky Brightness Monitor to Observe the Annular Solar Eclipse on 15 January 2010[J]. SOLAR PHYSICS,2012,279(2):561-572.
APA Liu Y,Shen YD,Zhang XF,Liu NP,&Liu, Y .(2012).Using a New Sky Brightness Monitor to Observe the Annular Solar Eclipse on 15 January 2010.SOLAR PHYSICS,279(2),561-572.
MLA Liu Y,et al."Using a New Sky Brightness Monitor to Observe the Annular Solar Eclipse on 15 January 2010".SOLAR PHYSICS 279.2(2012):561-572.
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