Monday, February 11, 2019

Why is dawn in Indonesia too early? (3)


On August 21, 2017, The Jakarta Islamic Center (JIC) in Jakarta invited us to present our interim results regarding the issue of the presence of dawn before an assembly of experts from different expertise. There were around 80 invitees which are generally sharia experts (hadith, interpretation, Islamic Astronomy, etc.). 

Two days later, on August 23, 2017, JIC sent its dawn observation team to photograph the dawn on Pramuka Island, Thousand Islands Regency. For this, the JIC observation team used an ordinary DSLR camera. This video explains the verification process by the third party. Visually, the JIC observation team did not witness the presence of dawn when the Fajr prayer call was echoed by the local mosque at 4:41, the official timing as suggested by the government. The team only confessed to witnessing the presence of dawn at about 5:15 which is about 14 minutes late as the estimated dawn using the SQM data occurred at 5:00:54. 

Furthermore, image processing analyses of the imageries taken by the team show that the real dawn only occurred at 5:20 which is 19 minutes later than the dawn calculated using the SQM data. This simply proves that the SQM sensor is apparently much more sensitive than the naked eyes. However, this report further convinced us that with better geometric and temporal resolutions, a DSLR camera might be a good instrument to verify the presence of dawn in the future. If this is of interest to you, please follow this link:



Previous video:

1) Why is dawn in Indonesia too early? (1)
2) Why is dawn in Indonesia too early? (2)

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