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The Application of Sky Quality Meter at Twilight for Islamic Prayer Time

The aim of this study is to detect elusive lightthat indicate the prayer time (Isha’). Therefore, we focused on optical sky brightness at dusk from May 2007 through April 2008 intermittently. The measurements of twilight sky brightness were covered at one (1) site covering; West coast of Peninsular...

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Main Authors: Shariff, N.N.M., Muhammad, A., Zainuddin, M.Z., Hamidi, Z.S.
Format: Article
Published: IACSIT Press 2012
Subjects:
Q Science (General)
Online Access:http://eprints.um.edu.my/14597/
http://www.ijapm.org/show-31-118-1.html
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spelling my.um.eprints.145972015-11-06T02:44:33Z http://eprints.um.edu.my/14597/ The Application of Sky Quality Meter at Twilight for Islamic Prayer Time Shariff, N.N.M. Muhammad, A. Zainuddin, M.Z. Hamidi, Z.S. Q Science (General) The aim of this study is to detect elusive lightthat indicate the prayer time (Isha’). Therefore, we focused on optical sky brightness at dusk from May 2007 through April 2008 intermittently. The measurements of twilight sky brightness were covered at one (1) site covering; West coast of Peninsular Malaysia. The measurements were done by applying Sky Quality Meter (SQM) which covered between400-700 nm in accordance of human eyes and SQM range. Results showed that there are clear indications of light changes when Sun at certain degree below horizon that visible by plateau form in twilight sky brightness dependences versus solar zenith angle. It is clarified that the yearly averages of solar depression by observation are best correlated within the range of 17.3o – 19.5o for Isha’. IACSIT Press 2012 Article PeerReviewed Shariff, N.N.M. and Muhammad, A. and Zainuddin, M.Z. and Hamidi, Z.S. (2012) The Application of Sky Quality Meter at Twilight for Islamic Prayer Time. International Journal of Applied Physics and Mathematics, 2 (3). pp. 143-145. ISSN 2010-362X http://www.ijapm.org/show-31-118-1.html DOI: 10.7763/IJAPM.2012.V2.71
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic Q Science (General)
spellingShingle Q Science (General)
Shariff, N.N.M.
Muhammad, A.
Zainuddin, M.Z.
Hamidi, Z.S.
The Application of Sky Quality Meter at Twilight for Islamic Prayer Time
description The aim of this study is to detect elusive lightthat indicate the prayer time (Isha’). Therefore, we focused on optical sky brightness at dusk from May 2007 through April 2008 intermittently. The measurements of twilight sky brightness were covered at one (1) site covering; West coast of Peninsular Malaysia. The measurements were done by applying Sky Quality Meter (SQM) which covered between400-700 nm in accordance of human eyes and SQM range. Results showed that there are clear indications of light changes when Sun at certain degree below horizon that visible by plateau form in twilight sky brightness dependences versus solar zenith angle. It is clarified that the yearly averages of solar depression by observation are best correlated within the range of 17.3o – 19.5o for Isha’.
format Article
author Shariff, N.N.M.
Muhammad, A.
Zainuddin, M.Z.
Hamidi, Z.S.
author_facet Shariff, N.N.M.
Muhammad, A.
Zainuddin, M.Z.
Hamidi, Z.S.
author_sort Shariff, N.N.M.
title The Application of Sky Quality Meter at Twilight for Islamic Prayer Time
title_short The Application of Sky Quality Meter at Twilight for Islamic Prayer Time
title_full The Application of Sky Quality Meter at Twilight for Islamic Prayer Time
title_fullStr The Application of Sky Quality Meter at Twilight for Islamic Prayer Time
title_full_unstemmed The Application of Sky Quality Meter at Twilight for Islamic Prayer Time
title_sort application of sky quality meter at twilight for islamic prayer time
publisher IACSIT Press
publishDate 2012
url http://eprints.um.edu.my/14597/
http://www.ijapm.org/show-31-118-1.html
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score 13.211869

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