Abstract
Obscuration of the Sun by the Moon during total solar eclipse generates the changing of the sky brightness. Sky Quality Meter (SQM) was employed to measure the sky brightness during the 2016 total solar eclipse. The sky was still bright at the first contact time. It is shown by the SQM value of zero. Approaching the second contact time, the SQM value is rising up started at the value of 5.92 mpsas. The curvature profile of the SQM measurementvalue is similar to the curvature profile of the SQM measurement at the dawn and dusk. However, the flatness part of the curvature is much shorter than night time value of SQM. The maximum of SQM measurement value is lower than the SQM measurement value during the night in Ternate. It is 12.47 mpsas and happened at the maximum phase of the eclipse. It was confirmed by the fact that at the time of totality, the sky close to the horizon was still bright. There is a discrepancy between the predicted and actual second and third contact and maximum eclipse time. By assigning the maximum of SQM measurement value as the reference value of maximum eclipse time, the actual second and third time can be calculated. The shape of curvature between the actual second and third contact time is symmetry.
Highlights
The total solar eclipse path of March 9th, 2016 was stretches across Indonesia
Since the sky brightness depends on sun altitude, the Sky Quality Meter (SQM) is able to measure the changes of sky brightness in function of time
The sky brightness during the total solar eclipse has been done in Ternate using SQM-LU
Summary
The total solar eclipse path of March 9th, 2016 was stretches across Indonesia. The total solar eclipse occured since early morning in the western part of Indonesia until mid-day in the eastern part of Indonesia. Published under licence by IOP Publishing Ltd to investigate the scattering contribution to the sky radiance during the total solar eclipse [4]. It is important to measure the sky brightness to understand characteristics of the atmosphere at the time of eclipse. This research is intended to measure the sky brightness changes during totality. 2. Instrumentation The sky brightness measurement has been done using Unihedron Sky Quality Meter (SQM).
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