Cover Image

Measuring the sun depression angle of Dawn with a DSLR camera

The first visibility of the dawn occurs at a definite angle of the sun depression, Do which is used to calculate the fajr (dawn) prayer time. Dawn observations were carried out using Digital Single-lens Reflex (DSLR) camera in the period from February to December 2017 at several locations in both Ma...

Full description

Saved in:
Bibliographic Details
Main Authors: Kassim Bahali,, Abdul Latif Samian,, Nazri Muslim,, Nurul Shazana Abdul Hamid,
Format: Article
Language:English
Published: Penerbit Universiti Kebangsaan Malaysia 2018
Online Access:http://journalarticle.ukm.my/12670/1/31%20Kassim%20Bahali.pdf
http://journalarticle.ukm.my/12670/
http://www.ukm.my/jsm/malay_journals/jilid47bil11_2018/KandunganJilid47Bil11_2018.html
Tags: Add Tag
No Tags, Be the first to tag this record!
id my-ukm.journal.12670
record_format eprints
spelling my-ukm.journal.126702019-03-17T11:54:26Z http://journalarticle.ukm.my/12670/ Measuring the sun depression angle of Dawn with a DSLR camera Kassim Bahali, Abdul Latif Samian, Nazri Muslim, Nurul Shazana Abdul Hamid, The first visibility of the dawn occurs at a definite angle of the sun depression, Do which is used to calculate the fajr (dawn) prayer time. Dawn observations were carried out using Digital Single-lens Reflex (DSLR) camera in the period from February to December 2017 at several locations in both Malaysia and Indonesia (Lat. between 2.0° - 7.0° N, Long. 95.0°-106.0°E). Within the observational period, 64 days of the dawn luminance at horizon were recorded with backgrounds of both sea and land. The purpose of these observations was to determine the sun depression angle Do at the first moment when the dawn is seen using a DSLR camera. The results indicated that Do can be determined using a DSLR camera. The value of Do is between -14.5° and -18.5° with a mean value of -16.67° and standard deviation of 0.9992. This suggests that the new sun depression angle Do for dawn prayer is -17.0°. Penerbit Universiti Kebangsaan Malaysia 2018-11 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/12670/1/31%20Kassim%20Bahali.pdf Kassim Bahali, and Abdul Latif Samian, and Nazri Muslim, and Nurul Shazana Abdul Hamid, (2018) Measuring the sun depression angle of Dawn with a DSLR camera. Sains Malaysiana, 47 (11). pp. 2877-2885. ISSN 0126-6039 http://www.ukm.my/jsm/malay_journals/jilid47bil11_2018/KandunganJilid47Bil11_2018.html
institution Universiti Kebangsaan Malaysia
building Perpustakaan Tun Sri Lanang Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Kebangsaan Malaysia
content_source UKM Journal Article Repository
url_provider http://journalarticle.ukm.my/
language English
description The first visibility of the dawn occurs at a definite angle of the sun depression, Do which is used to calculate the fajr (dawn) prayer time. Dawn observations were carried out using Digital Single-lens Reflex (DSLR) camera in the period from February to December 2017 at several locations in both Malaysia and Indonesia (Lat. between 2.0° - 7.0° N, Long. 95.0°-106.0°E). Within the observational period, 64 days of the dawn luminance at horizon were recorded with backgrounds of both sea and land. The purpose of these observations was to determine the sun depression angle Do at the first moment when the dawn is seen using a DSLR camera. The results indicated that Do can be determined using a DSLR camera. The value of Do is between -14.5° and -18.5° with a mean value of -16.67° and standard deviation of 0.9992. This suggests that the new sun depression angle Do for dawn prayer is -17.0°.
format Article
author Kassim Bahali,
Abdul Latif Samian,
Nazri Muslim,
Nurul Shazana Abdul Hamid,
spellingShingle Kassim Bahali,
Abdul Latif Samian,
Nazri Muslim,
Nurul Shazana Abdul Hamid,
Measuring the sun depression angle of Dawn with a DSLR camera
author_facet Kassim Bahali,
Abdul Latif Samian,
Nazri Muslim,
Nurul Shazana Abdul Hamid,
author_sort Kassim Bahali,
title Measuring the sun depression angle of Dawn with a DSLR camera
title_short Measuring the sun depression angle of Dawn with a DSLR camera
title_full Measuring the sun depression angle of Dawn with a DSLR camera
title_fullStr Measuring the sun depression angle of Dawn with a DSLR camera
title_full_unstemmed Measuring the sun depression angle of Dawn with a DSLR camera
title_sort measuring the sun depression angle of dawn with a dslr camera
publisher Penerbit Universiti Kebangsaan Malaysia
publishDate 2018
url http://journalarticle.ukm.my/12670/1/31%20Kassim%20Bahali.pdf
http://journalarticle.ukm.my/12670/
http://www.ukm.my/jsm/malay_journals/jilid47bil11_2018/KandunganJilid47Bil11_2018.html
_version_ 1643738855236435968
score 13.211869

Similar Items