8 research outputs found
Pengamatan fajar ṣādiq menggunakan all sky camera di Kota Medan
Get PDFWaktu salat Subuh dimulai ketika terbit fajar ṣādiq dan berakhir sampai terbit Matahari. Di Indonesia sendiri banyak ahli falak yang menetapkan kriteria ketinggian Matahari untuk menentukan awal waktu salat Subuh dengan ketinggian yang bervariatif, mulai dari -18o sampai -20o di bawah ufuk bahkan sampai pada ketinggian -13o di bawah ufuk. Kementerian Agama RI menetapkan ketinggian Matahari untuk waktu salat Subuh adalah -20o di bawah ufuk. Dengan adanya perbedaan dalam menetapkan ketinggian Matahari di bawah ufuk, para ahli falak maupun astronomi banyak melakukan pengamatan ulang terhadap kemunculan fajar ṣādiq. Salah satunya pengamatan fajar ṣādiq menggunakan All Sky Camera. Studi ini bertujuan untuk menjawab permasalahan: (1) Bagaimana akurasi pengamatan fajar ṣādiq menggunakan All Sky Camera? (2) Bagaimana pengaruh kondisi langit terhadap keterlihatan fajar ṣādiq menggunakan All Sky Camera?. Penelitian ini merupakan penelitian kuantitatif dengan pendekatan lapangan (field research) melalui observasi untuk mengumpulkan data dilapangan secara langsung. Teknik pengumpulan data yang digunakan adalah observasi dan wawancara. Sedangkan teknik analisis data yang digunakan yaitu deskriptif statistik.
Hasil penelitian ini menunjukkan bahwa (1) pengamatan dilakukan selama 6 bulan dengan rentang bulan Oktober-Nopember 2021 dan Januari-April 2022 didapatkan ketinggian Matahari antara -15o sampai -13o di bawah ufuk. Terdapat perbedaan ketinggian Matahari yang didapatkan disebabkan perbedaan tingkat polusi cahaya dilokasi pengamatan. Keakuratan All Sky Camera dalam mengamati fajar tergantung pada lokasi pengamatan, (2) Keterlihatan fajar ṣādiq menggunakan All Sky Camera sangat dipengaruhi kondisi kecerahan langit, seperti awan tebal, mendung (cuaca gelap) maupun yang disebabkan polusi cahaya, sehingga All Sky Camera lebih lambat dalam mendeteksi kemunculan fajar ṣādiq dibandingkan dengan pada saat kondisi langit cerah.
ABSTRACT:
The time for the Fajr prayer begins at dawn ṣādiq and ends until the sun rises. In Indonesia, astronomers determine the criteria for the altitude of the Sun start of the Fajr prayer time with varying altitudes, in scale from -18o to -20o below the horizon and even up to an altitude of -13o below the horizon. The Ministry of Religion of the Republic of Indonesia has determined that the altitude of the Sun for the Fajr prayer is -20o below the horizon. With the difference in determining the altitude of the Sun below the horizon, astronomers and observers have made observations of the appearance of ṣādiq dawns. One of them is observing fajr ṣādiq using All Sky Camera. This study aims to answer the problems: (1) How accurate is the observation of ṣādiq dawn using the All Sky Camera? (2) How is the effect of sky conditions on the sight of ṣādiq dawn using the All Sky Camera?. This research is a quantitative research with a field research approach through observation to collect data in the field directly. Data collection techniques used are observation and interviews. While the data analysis technique used is descriptive statistics.
The results of this study indicate that (1) observations were made for 6 months with a range of October-November 2021 and January-April 2022, the Sun's altitude was between -15o to -13o below the horizon. There is a difference in the altitude of the Sun obtained due to differences in the level of light pollution at the observation location. The accuracy of the All Sky Camera in observing dawn depends on the location of observation, (2) The appearance of ṣādiq dawn using the All Sky Camera is strongly influenced by conditions of sky brightness, such as thick clouds, overcast (dark weather) or caused by light pollution, so All Sky Camera is slower in detecting the appearance of ṣādiq dawn compared to when the sky bright
PROBLEM AND SOLUTIONS FOR ACCEPTING A SINGLE GLOBAL ISLAMIC CALENDAR
Get PDFThe Global Islamic Calendar functions to realize the unity of the Ummah with a globally unique calendar and minimize differences between countries in the implementation of worship based on determining the beginning of the Hijriyah month. The fact is that Islamic civilization is almost 1.5 millennia old and to this day does not yet have an accurate, unifying calendar system. In realizing a Single Global Islamic Calendar, Saudi Arabia has a dominant factor because it is the center of Islamic Worship including the place where Wukuf is carried out on Arafah. Therefore, this research will describe problem and solutions for accepting a single global islamic calendar. This research method uses qualitative and quantitative methods with a systems thinking approach. The results of this research provide an approach, argumentation, and solution with a new criterion, namely Neo KHGT Turkey 2016 so that the acceptance of a single global Hijriyah calendar for Saudi Arabia and the world can be realized
Hilal Observation using LRGB Filters
Get PDFThe technology used in hilal observation continues to develop. Most recently, using filters has become one of the options in hilal observation. Several filters can be used, ranging from low wavelengths like ultraviolet to high wavelengths like infrared. In some ideas, there needs to be a limit to the use of filters, the human eye\u27s ability as a benchmark for the filter used. The human eye is sensitive to light with visual wavelengths, and one type of filter in this range is the LRGB filter. In this study, hilal observations were made on four filters and compared to find out which filter is better at increasing the contrast of hilal against the background. Using Michelson and Weber contrast as the definition of contrast to determine the comparison of the brightness value of the object with the background. From the observations made, it is found that the R filter will produce higher contrast values at low altitudes, followed by the L, G, and B filters. However, at higher altitudes, the contrast values of the L and R filters are similar, while the G and B filters remain low
Frequency-Based Analysis of Mosque Qibla Errors in Medan
Get PDFMosque plays a vital role in supporting the performance of prayer comfortably and solemnly. However, one of the most crucial elements in mosque construction is the accuracy of the qibla direction facing the Kaaba. In cities far from the Kaaba, such as Medan, determining the qibla direction cannot be done visually and requires precise astronomical calculations and technical approaches. The problem that arises is the continued presence of mosques with qibla directions deviating from the correct orientation, which can affect the quality of worship for Muslims. This study uses a specially reduced mosque Qibla measurement sample data in Medan city. This paper analyzes data from 38 mosque samples with Qibla direction errors, which were re-measured by the UMSU OIF team. The data were then processed using a frequency distribution method to provide an overview of the error distribution in mosque Qibla directions across the city of Medan. This study found that the error often seen is a deviation of 9-12 degrees from the Qibla direction, and the mistake factors. This study also found that the misalignment of Qibla directions in Medan is mainly due to prioritizing land efficiency over directional accuracy during mosque construction, as well as relying on general assumptions and previously heard fatwas rather than precise astronomical calculations
SHADIQ DAWN OBSERVATION USING ALL SKY CAMERA IN DELI SERDANG, NORTH SUMATERA
Get PDFTechnological advancements in optics and digital image recorders as means were breakthroughs in capturing and observing Shadiq Fajr's appearance which produce images according to visual as seen by the eye in the field. Digital camera usage such as the All-Sky Camera which is adjustable in taking dawn data according to a certain time, could show the sky conditions from dark to light, thus providing real evidence of the shadiq fajr appearance. Based on the research conducted, there are differences in Fajr prayer times based on the results of the observations by the All-Sky Camera with processed images using ImageJ and the Fajr prayer schedule issued by the Ministry of Religion of the Republic of Indonesia. Based on the image produced by ASC and processed using imagej, it shows that there is a change in the sky from dark to bright time which is characterized by significant graphic changes continuously. The study results obtained the average of the Sun depth at the Shadiq Fajr appearance is the altitude of 13.75 degrees below the horizon.Kemajuan teknologi dalam bidang optik dan alat pengambil gambar digital menjadi sarana dan merupakan terobosan baru dalam mengabadikan dan mengamati awal kemunculan fajar shadiq yang dapat menghasilkan citra sesuai kondisi visual yang terlihat dengan mata dilapangan. Penggunaan kamera digital seperti All Sky Camera yang dapat diatur dalam pengambilan data fajar sesuai waktu tertentu yang dapat memperlihatkan kondisi langit dari gelap ke terang, sehingga memberikan bukti yang nyata terhadap kemunculan fajar shadiq. Berdasarkan penelitian yang dilakukan, terdapat selisih antara waktu salat Subuh berdasarkan hasil pengamatan menggunakan All Sky Camera dengan olahan citra menggunakan ImageJ dan berdasarkan jadwal salat yang dikeluarkan Kemenag RI. Berdasarkan citra yang dihasilkan ASC serta olahan menggunakan ImageJ terlihat adanya perubahan langit dari malam ke terang yang ditandai dengan adanya perubahan grafik yang signifikan secara terus-menerus. Hasil penelitian didapatkan rata-rata ketinggian Matahari pada saat kemunculan fajar shadiq pada ketinggian 13.75 derajat di bawah ufuk
History of Location Objectives (Hilal Tracker): Development of Astronomical Observations from 2015-Present
Get PDFThis study examined the development of Hilal Tracker as a system for determining the location of hilal observations that has been developed since 2015 until now. This system emerged from the need for an accurate, efficient, and documented way to find the best place to see the Hilal, which is an important factor in determining the beginning of the month in the Hijri calendar. This article explains the history of the development of hilal Tracker technology and methods, including integrating astronomical data, using satellite imagery, algorithms for predicting hilal visibility, and cooperation with various local and international institutions. With a historical qualitative approach and chronological documentation, this paper examined the changes in innovation from the early phase to the modern stage. The findings showed that Hilal Tracker has improved the accuracy of rukyat location selection, strengthened the global hilal visibility database, and supported the alignment of hisab and rukyat methodologies in some Islamic countries. In addition, this system functions as a link between classical Islamic astronomy and modern technology through an open approach and academic collaboration. Therefore, Hilal Tracker is not just a technical device, but also a means of education and diplomacy in creating a unified Hijri calendar worldwide with an observational approach. This study recommends further development of local weather forecasting aspects and artificial intelligence to improve location efficiency in the future
Upaya memasyarakatkan astronomi melalui OIF Goes To School di Sekolah MIN 12 Medan
Get PDFAstronomi lahir dari kebutuhan masyarakat dalam pencarian penanda waktu dan arah. Namun, masyarakat sendiri belum banyak yang mengenal fenomena astronomi dan cenderung lupa bahkan tidak mengetahui tentang fenomena tersebut. Upaya mengenalkan astronomi kepada masyarakat merupakan salah satu solusi yang dilakukan oleh peneliti yang bekerjasama dengan OIF UMSU masih sebatas di sekolah dilakukan dengan memanfaatkan Program OIF Goes to School di Kota Medan. Program yang dilakukan adalah Sosialisasi dan mengedukasi masyarakat tentang fenomena astronomi, pengamatan matahari dengan teleskop dan kacamata matahari, serta instrumen Astronomi lainnya yang dibawa saat kegiatan berlangsung. Dari program yang dilakukan, masyarakat memberi respon melalui kuisioner dengan skala likert. Respon masyarakat sangat baik, dengan nilai rata-rata sebesar 3,71. Sebanyak 96% responden menyatakan perlu selalu diadakan kegiatan ini kembali
PENENTUAN WAKTU SUBUH MENGGUNAKAN ALL SKY CAMERA DAN METODE MOVING AVERAGE DI KOTA MEDAN
Get PDFWaktu salat Subuh dimulai ketika terbit fajar shadiq dan berakhir sampai terbit Matahari. Di Indonesia banyak ahli falak yang menetapkan kriteria ketinggian Matahari untuk menentukan awal waktu salat Subuh dengan ketinggian yang bervariatif, mulai dari -18 derajat sampai -20 derajat di bawah ufuk bahkan pada ketinggian -13 derajat di bawah ufuk. Kementerian Agama RI menetapkan ketinggian Matahari untuk waktu salat Subuh pada -20 derajat di bawah ufuk. Dengan adanya perbedaan dalam menetapkan ketinggian Matahari di bawah ufuk, para ahli falak maupun astronomi banyak melakukan pengamatan ulang terhadap kemunculan fajar shadiq. Salah satunya melakukan pengamatan fajar shadiq menggunakan All Sky Camera dengan metode moving average dan pendekatan Gradien. Penelitian ini merupakan penelitian kuantitatif dengan pendekatan (field Research) melalui observasi untuk mendapatkan data dilapangan secara langsung. Berdasarkan penelitian yang dilakukan didapatkan kemunculan fajar shadiq pada saat ketinggian Matahari pada -15 derajat di bawah ufuk.Â
