Using a New Sky Brightness Monitor to Observe the Annular Solar Eclipse on 15 January 2010

	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)
刊名	SOLAR PHYSICS
	2012-08
卷号	279 期号:2 页码:561-572
关键词	Atmospheric extinction Earth's atmosphere Instrumental effects
ISSN号	0038-0938
通讯作者	Liu, Y (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Astron Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
收录类别	SCI
原文出处	http://link.springer.com/article/10.1007%2Fs11207-012-0012-y
语种	英语
WOS记录号	WOS:000306440800015
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/7180]
专题	云南天文台_选址与日冕观测组
作者单位	National Astronomical Observatories/Yunnan Astronomical Observatory, CAS, Kunming, 650011, China
推荐引用方式 GB/T 7714	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.(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.