Liu Xin
College of Geodesy and Geomatics, Shandong University of Science and Technology, 266590, Qingdao, China
Guo Jin-Yun
College of Geodesy and Geomatics, Shandong University of Science and Technology, 266590, Qingdao, China
Song Lai-Yong
College of Geodesy and Geomatics, Shandong University of Science and Technology, 266590, Qingdao, China
Dai Jie
College of Geodesy and Geomatics, Shandong University of Science and Technology, 266590, Qingdao, China
Han Yan-Ben
National Astronomical Observatories, Chinese Academy of Sciences, 100012, Beijing, China
ABSTRACT
Annular solar eclipse took place at Jan. 15, 2010 and Qingdao was one of best good places to observe it. We used two CCD cameras to take photos of zenith sky on Dongmen Mt. of Qingdao at Jan. 15 and 16 to study the effect of annular solar eclipse on the sky brightness at the dusk. After image processing, gray curves were constructed based on three primary components of Red (R), Green (G) and Blue (B). The principle component analysis method was used to analyze the variations of sky brightness caused by the annular eclipse comparing with the normal condition at Jan. 16. Curves of R, G, B and gray roughly had the consistent pattern. The annular solar eclipse affected seriously the normal variations of components R, G and B, among which components of R and G were more affected than that of B. Meantime the R component was most sensitive to the annular solar eclipse. The annular solar eclipse affected the mean gray each epoch with a certain time lag by comparing gray curves in Jan. 15 and 16. This influence to gray is up to maximum at 17:15 and tends to stable while relighting.
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How to cite this article
Liu Xin, Guo Jin-Yun, Song Lai-Yong, Dai Jie and Han Yan-Ben, 2013. On Sky Brightness Variantion Caused by Annular Solar Eclipse Observed with
CCD Cameras. Information Technology Journal, 12: 4503-4507.
DOI: 10.3923/itj.2013.4503.4507
URL: https://scialert.net/abstract/?doi=itj.2013.4503.4507
DOI: 10.3923/itj.2013.4503.4507
URL: https://scialert.net/abstract/?doi=itj.2013.4503.4507
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