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All Journal Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram
Prakoso, Tio Azhar
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Astronomy Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics Other

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PERKIRAAN KETINGGIAN OBJEK ALAM TERHADAP HORIZON UNTUK EVALUASI LOKASI PENGAMATAN HILAL DI LOMBOK Taruna, Rian Mahendra; Prakoso, Tio Azhar
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 7, No 2 (2017)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v7n2.p115-122

Abstract

Pengamatan hilal dalam penentuan awal Bulan Hijriah merupakan isu penting di Indonesia. Titik pengamatan hilal baru juga mulai dikaji guna meningkatkan peluang teramatinya hilal. Salah satu faktor penting dalam menentukan lokasi pengamatan adalah faktor keberadaan objek alam tinggi yang berpotensi menghalangi hilal. Oleh karena itu, studi ini bertujuan untuk melihat perkiraan kenampakan objek alam dan hilal terhadap horizon pengamat. Perkiraan kenampakan objek alam dilakukan dengan melakukan pemodelan apparent altitude. Apparent altitude merupakan ketinggian objek yang teramati terhadap horizon dalam ukuran derajat dan dipengaruhi oleh fenomena refraksi. Hasil pemodelan menunjukkan bahwa pemilihan lokasi Pantai Loang Baloq, Lombok dalam pengamatan hilal kurang optimal, karena ketinggian hilal harus memenuhi syarat lebih dari 2,07º agar tidak terhalang oleh Gunung Agung. Pemodelan dalam penelitian ini divalidasi dengan menggunakan data pengamatan hilal 1 Syawal 1438 H atau 24 Juni 2017 di Loang Baloq. Validasi menunjukkan bahwa hasil pemodelan relatif sesuai dengan hasil pengamatan langsung dengan teropong.
Analysis of Correction for the Indonesian People's Accelerograph (ARI) based on MEMS ADXL 355 Satrio, Adji; Hidayat, Nurul; Martha, Agustya Adi; Widodo, Handi Sulistyo; Nugroho, Hapsoro Agung; Akram, Rafi Syah; Sutejo, Bayu; Prakoso, Tio Azhar
Prisma Sains : Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Vol 13, No 2: April 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-ps.v13i2.15139

Abstract

Indonesia, geographically situated on the Pacific Ring of Fire, has one of the highest potentials for earthquake and tsunami disasters worldwide, second only to Japan. These seismic events pose significant threats, including loss of life and infrastructure damage. One of the key strategies to mitigate earthquake risks is the implementation of Earthquake Early Warning System (EEWS) technology, which heavily relies on the spatial distribution of accelerographs. The Indonesian People's Accelerograph (ARI) has been designed as an affordable and independently built solution to record ground vibration acceleration, utilizing the MEMS-based ADXL 355 sensor and an ESP32 microcontroller for efficient EEWS implementation. This study focuses on the development and correction of the ARI system to enhance instrument response accuracy by analyzing ground acceleration vibration data through an inversion-based method applied to ARI recordings. The results demonstrated that the ARI accelerograph exhibits pole values of 1.31260317e-07 and -2.43562359e-02, zero values of -1.23898531e-06 and 2.77232055, and a gain of 72.97. These findings confirm that the ARI accelerograph provides reliable seismic data, highlighting its potential as an essential tool in reducing earthquake risk and mitigating seismic disaster impacts through improved earthquake early warning capabilities.
Instrument Response of the Indonesian People's Accelerograph (ARI) Type I Based on MEMS Sensor MPU6050 Akram, Rafi Syah; Satrio, Adji; Sutejo, Bayu; Martha, Agustya Adi; Widodo, Handi Sulistyo; Nugroho, Hapsoro Agung; Prakoso, Tio Azhar; Hudayat, Nurul
Prisma Sains : Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Vol 13, No 2: April 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-ps.v13i2.15206

Abstract

The Indonesian People’s Accelerograph (ARI) is an innovative ground motion recording device developed using predominantly local, cost-effective components to accurately monitor and record seismic-induced ground acceleration for disaster mitigation. This study aimed to evaluate the instrument response of ARI Type I, which utilizes a MEMS sensor (MPU6050) to capture dynamic acceleration data crucial for earthquake early warning systems. The research involved a comprehensive methodology comprising hardware design, field testing, and in-depth analysis of the instrument’s response by determining key parameters such as gain, poles, and zeros under various seismic conditions. The hardware was meticulously designed using KiCAD, with the final assembly enclosed in a 3D-printed casing that integrates the ESP32 microcontroller, sensor, SD card, and LCD, while data communication was achieved via I2C and WiFi protocols, and time synchronization was maintained using NTP. Field tests conducted at the UNILA site demonstrated that ARI Type I records ground acceleration on all three axes at a density of 50 signals per second. Data retrieved and processed through Python into a DataFrame confirmed the system’s high sensitivity and reliability, with a measured gain of approximately 3637.48 V/g, poles of 1.39133434×10⁻⁸ and 9.10426934×10⁻², and zeros of –1.52128433×10⁻⁶ and –4.69561707×10³. These promising results validate the potential of ARI Type I as an effective tool for seismic monitoring, contributing to the development of robust early warning systems and enhancing disaster resilience in earthquake-prone regions.
Co-Authors Akram, Rafi Syah Handi Sulistyo Widodo, Handi Sulistyo Hapsoro Agung Nugroho Hudayat, Nurul Martha, Agustya Adi Nurul Hidayat Satrio, Adji Sutejo, Bayu Taruna, Rian Mahendra