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All Journal Jurnal Dinamis Jurnal Penelitian Fisika dan Aplikasinya (JPFA) TELKOMNIKA (Telecommunication Computing Electronics and Control) Jurnal Fisika Unand Emerging Science Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Hilirisasi IPTEKS (JHI) Jurnal Ilmu Fisika INTEGRITAS : Jurnal Pengabdian BERNAS: Jurnal Pengabdian Kepada Masyarakat Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks Makara Journal of Science Indonesian Journal of Community Empowerment and Service
Mutya Vonnisa
Jurusan Fisika Universitas Andalas
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Comparison of Bright Band Radar from GPM and MRR Observation in West Sumatera Ravidho Ramadhan; Marzuki Marzuki; Mutya Vonnisa; Harmadi Harmadi; Hiroyuki Hashiguchi; Toyoshi Shimomai
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 11 No. 1 (2021)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v11n1.p50-62

Abstract

The Bright band (BB) observation can be used as an indication of the melting layer height. Measurement of BB from Normal Scan (NS) on Global Precipitation Measurement (GPM) had been compared with Micro Rain Radar (MRR), which is installed in Kototabang, West Sumatera (0.23o S; 100.32oE; 865 m above sea level). The GPM data were collected from December 2014 to June 2018 and compared with MRR observation from January 2012 to August 2016. The BB values from these instruments were also compared with the values recommended by the International Telecommunication Union Recommendation (ITU-R) P.839. The BB from GPM and MRR showed slightly diurnal and seasonal variations. BB observations from GPM and MRR show good agreement with slightly difference in diurnal and seasonal variations. BB observations are more similar when the intensity of solar radiation is lower, i.e. at night (18.00-24.00 LT) until early morning (00.00-06.00 LT). Furthermore, MRR showed a slight bimodal pattern in the seasonal variation while GPM did not. Thus, the seasonal variation in observation of both instrument is different. The largest different from the seasonal variation was observed in the summer season (June-August(JJA)). The mean BB of the two instruments is lower than the Freezing Height Level (FHL) value calculated from the ITU-R model. However, many BB from the two instruments (>36 %) has a BB altitude higher than FHL. Thus, the constant assumption of FHL in West Sumatera for the rain attenuation estimation of microwaves may not be appropriate.
PENGEMBANGAN METODE DUAL-FREKUENSI UNTUK MENGAMATI STRUKTUR VERTIKAL RAINDROP SIZE DISTRIBUTION (DSD) DI KOTO TABANG Mutya Vonnisa
Jurnal Ilmu Fisika (JIF) Vol 6 No 2 (2014): September 2014
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.6.2.52-58.2014

Abstract

Metode untuk mengamati struktur vertikal parameter mikrofisika hujan yang dikenal dengan DSD telah dikembangkan menggunakan data Equatorial Atmosphere Radar (EAR) dan Boundary Layer Radar (BLR) di Koto Tabang, Sumatera Barat, Indonesia. Spektrum hujan dari BLR yang merupakan fungsi DSD dimodelkan dengan modifikasi fungsi gamma dan spektrum turbulen atmosfir dari EAR dimodelkan dengan fungsi Gauss. Parameter DSD dan turbulen didapatkan dengan menggunakan metode non-linear least square fitting. Data dari Joss-Wadvogel Disdrometer (JD) digunakan untuk memvalidasi hasil yang didapatkan dari data radar. Hasil penelitian memperlihatkan bahwa metode dual-frekuensi lebih akurat dibandingkan dengan metode single-frekuensi. Hal itu ditunjukkan oleh hasil fitting spektrum hujan dari metode dualfrekuensi lebih tinggi dan jelas dibandingkan metode single-frekuensi. Selain itu DSD yang dihasilkan oleh metode dual-frekuensi lebih mendekati DSD dari JD dibandingkan dengan singlefrekuensi.
Statistical Comparison of IMERG Precipitation Products with Optical Rain Gauge Observations over Kototabang, Indonesia Helmi Yusnaini; Ravidho Ramadhan; Marzuki Marzuki; Ayu Putri Ningsih; Hiroyuki Hashiguchi; Toyoshi Shimomai; Mutya Vonnisa; Harmadi Harmadi; Wiwit Suryanto; Sholihun Sholihun
Jurnal Ilmu Fisika (JIF) Vol 14 No 1 (2022): March 2022
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.14.1.10-20.2022

Abstract

Satellite-based precipitation estimates play a crucial role in many hydrological and numerical weather models, especially to overcome the scarcity of rain gauge data. Globally gridded rainfall product from Integrated Multi-Satellite Retrievals for Global Precipitation Measurement (GPM) (IMERG) has been used in a wide range of hydrological applications. However, the IMERG is inherently prone to errors and biases. This study evaluated the performance of the IMERG-Final run (IMERG-F) product to estimate rainfall in a mountainous area of Sumatra. Validation was carried out using optical rain gauge (ORG) data for 15 years (2002-2016), at Kototabang, West Sumatra, Indonesia. In general, IMERG-F overestimated rainfall in all time scales. The longer the time scale was, the better the performance of IMERG-F we obtained. This feature was indicated by all quantities of continuous and categorical statistical matrices used. The performance of IMERG-F was lower than in other areas of the Maritime Continent, except for the probability of detection (POD) value. IMERG-F could detect rain very well, including for daily and hourly data, but the false alarm rate (FAR) was also relatively high. Such high FAR value may indicate a significant small-scale spatial rainfall variability in mountainous area of Sumatra.
Program Handsanitizer dan Masker Kain Gratis bagi Masyarakat Kurang Mampu di Sekitar Kampus Universitas Andalas dalam Rangka Mencegah Penularan COVID-19 Afdal Afdal; Marzuki Marzuki; Muldarisnur Muldarisnur; Ardian Putra; Trengginas Eka Putra Sutantyo; Dwi Pujiastuti; Mutya Vonnisa; Fadilla Monica; Yoci Darwita Putri; Sucy Lestari Wirma; Novia Dwi Agusri; Eldiani Arifya
Warta Pengabdian Andalas Vol 27 No 2 (2020)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jwa.27.2.95-103.2020

Abstract

COVID-19 has become a terrifying thing for everyone. The government has made several decisions to prevent the spread of this disease, such as the program of physical distancing where economic, educational, entertainment, social, and even religious activities are requested to be carried out at home. The physical distancing policy also has a negative impact. This program results in reduced community mobility and a sluggish economy. Many people working in the informal sector with a daily income are experiencing difficulties. They struggle to meet their daily needs, especially buying face masks and hand sanitizers. This problem has inspired our community service team at the Department of Physics FMIPA Andalas University, West Sumatra (Indonesia), to make a program to overcome this problem by distributing 400 pieces of cloth masks and 120 bottles of hand sanitizer accessible to the public. This activity was very beneficial for the community, shown by their enthusiasm when the stock of cloth masks and hand sanitizers was gone in one hour. Most people do not use masks in outdoor activities, not because they do not want to wear them, but because of economic constraints. There is a need that is more important than a mask. To prevent the spread of COVID-19, especially to the poor, the government must provide them with free masks.
Ground Validation of GPM IMERG-F Precipitation Products with the Point Rain Gauge Records on the Extreme Rainfall Over a Mountainous Area of Sumatra Island Ravidho Ramadhan; Marzuki Marzuki; Helmi Yusnaini; Ayu Putri Ningsih; Hiroyuki Hashiguchi; Toyoshi Shimomai; Mutya Vonnisa; Syarifatul Ulfah; Wiwit Suryanto; Sholihun Sholihun
Jurnal Penelitian Pendidikan IPA Vol. 8 No. 1 (2022): January
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i1.1155

Abstract

Accurate satellite precipitation estimates over areas of complex topography are still challenging, while such accuracy is of importance to the adoption of satellite data for hydrological applications. This study evaluated the ability of Integrated Multi-satellitE Retrievals for GPM -Final (IMERG) V06 product to observe the extreme rainfall over a mountainous area of Sumatra Island. Fifteen years of optical rain gauge (ORG) observation at Kototabang, West Sumatra, Indonesia (100.32°E, 0.20°S, 865 m above sea level), were used as reference surface measurement. The performance of IMERG-F was evaluated using 13 extreme rain indexes formulated by the Expert Team on Climate Change Detection and Indices (ETCCDI). The IMERG-F overestimated the values of all precipitation amount-based indices (PRCPTOT, R85P, R95P, and R99P), three precipitation frequency-based indices (R1mm, R10mm, R20mm), one precipitation duration-based indices (CWD), and one precipitation intensity-based indices (RX5day). Furthermore, the IMERG-F underestimated the values of precipitation frequency-based indices (R50mm), one precipitation duration-based indices (CDD), one precipitation intensity-based indices (SDII). In terms of correlation, only five indexes have a correlation coefficient (R) > 0.5, consistent with Kling–Gupta Efficiency (KGE) value. These results confirm the need to improve the accuracy of the IMERG-F data in mountainous areas.
Seasonal and Diurnal Variations of Lightning Activity Over West Sumatra and Its Correlation with Precipitation Type Saufina, Elfira; Marzuki, Marzuki; Vonnisa, Mutya; Hashiguchi, Hiroyuki; Harmadi, Harmadi
Makara Journal of Science Vol. 22, No. 2
Publisher : UI Scholars Hub

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Abstract

Seasonal and diurnal variations of lightning activity over West Sumatra have been investigated using observations of Tropical Rainfall Measuring Mission–Lightning Imaging Sensor (TRMM–LIS) over a 16-year period. This study also used TRMM 3B43 and 2A25 data to observe the correlation between lightning activity with rainfall and precipitation type. Results show that lightning occurs more frequently over land than over ocean and coastal areas, in contrast to total rainfall, which is higher over ocean and coastalareas. The lightning pattern is similar to the convective rainfall (particularly deep convective) pattern, which indicates that the majority of lightning in West Sumatra is associated with deep convective rain. The lightning intensity in Indonesia during the convection period, namely, December–January–February and September–October–November, is higher than that during other periods. The diurnal cycle of lightning coincides with the diurnal cycle of cloud migration from the ocean to in land Sumatra, as reported in previous research. Lightning and deep convective precipitation are dominant during the day and evening (16.00–20.00 Local Standard Time [LST]), particularly over land. Stratiform precipitation occursmore frequentlyfrom afternoon to early morning (16.00–04.00 LST) over landand at 00.00–12.00 LST over the ocean.
Statistical Properties of Cloud Propagation over Sumatra during CPEA-I Rahayu, Aulya; Marzuki,; Vonnisa, Mutya
Makara Journal of Science Vol. 20, No. 4
Publisher : UI Scholars Hub

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Abstract

Cloud propagation over Sumatra and the surrounding area (10°S-10°N, 70°-120°E) during the Coupling Processes in the Equatorial Atmosphere-I (CPEA-I) campaign (10 April to 9 May 2004) was tracked using brightness temperature (Tb) data from the GOES-9 satellite. The cloud tracking was based on three-dimensional data with a threshold of Tb < 210 K. During the campaign, westward-moving clouds were more dominant than eastward-moving systems, with a ratio of approximately 4:1. This characteristic coincided with the dominant easterly wind aloft. Most clouds propagated with a speed varying between 4 and 35 m/s, with a mean value of 13.7 m/s. If the westward and eastward propagations were separated, the average duration, speed, and span of the westward (eastward) moving clouds are 7.7 (5.8 h), -14.5 (9.8 m/s), and 435.5 (187.1 km), respectively. The characteristics of cloud propagation during the CPEA-I were influenced by environmental factors such as relative humidity, temperature, the vertical movement of air, and wind shear. Such factors interacted with the inactive and active phases of the Madden-Julian Oscillation.
Estimation of Raindrop Size Distribution Parameters Using Rain Attenuation Data from a Ku-Band Communications Satellite Indrayani, Wira; Marzuki,; Vonnisa, Mutya
Makara Journal of Science Vol. 20, No. 3
Publisher : UI Scholars Hub

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Abstract

The rain attenuation of down-link radio wave signals from the Superbird-C satellite and surface rainfall data have been used to estimate the parameters of exponential raindrop size distribution (DSD) at Koto Tabang (100.32 °E, 0.20 °S), West Sumatra, Indonesia. Prior to analyzing the measured data, the ability of the method to recover the parameters of known DSDs from which the samples were taken was examined. It was found that the method can accurately retrieve the input parameter of the sample. Only six case studies are presented here, so the results are representative rather than definitive. The method successfully estimated the DSD parameters of a stratiform case with steady intensity and deep convective rains of a short duration. This can be inferred from the small difference between the parameters derived from rain attenuation data and those derived from a 2D video disdrometer. The poor performance of the method was observed for a stratiform case with strong rain intensity fluctuation and shallow convective rains with very low rain top height. This phenomenon is probably due to the bias that may be inherent in the estimation of specific rain attenuation, such as the assumption of a constant path length throughout the rain.
Optimalisasi Pemanfaatan Media Online Phet Simulation Untuk Upaya Peningkatkan Pemahaman Konsep Fisika di SMA N 2 Harau Ramacos Fardela; Dedi Mardiansyah; Meqorry Yusfi; Elistia Liza Namigo; Afdal; Mutya Vonnisa; Muldarisnur; Harmadi; Imam Taufiq; Ahmad Fauzi Pohan; Astuti; Afdhal Muttaqin; Dian Fitriyani; Dwi Pujiastuti; Sri Handani; Dwi Puryanti; Trengginas Eka Putra Sutantyo; Zulfi; Feriska Handayani Irka; Alimin Mahyudin; Nini Firmawati; Dian Milvita; Sri Oktamuliani; Sri Rahayu Alfitri Usna; Rico Adrial
Indonesian Journal of Community Empowerment and Service (ICOMES) Vol. 2 No. 2: December 2022
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (561.748 KB) | DOI: 10.33369/icomes.v2i2.24459

Abstract

Fisika menganut metodologi ilmiah (sains) yang memuat tiga kegiatan terpadu dan membentuk daur (cycles) empirico-logico-verification yang pertama kali dirintis oleh I. Newton yaitu (1) pengamatan gejala-gejala alam (kegiatan empiris melalui fisika eksperimen), (2) Penalaran untuk menjelaskan hasil pengamatan tersebut dan ekstensinya sehingga mampu menghasilkan ramalan mengenai gejala baru (kegiatan berlogika melalui fisika teori) dan (3) pengujian mengenai kesesuaian ramalan tersebut dengan realitas alam (kegiatan verifikasi melalui fisika eksperimen). Keberadaan laboratorium di sekolah-sekolah menjadi kunci keberhasilan dalam memperkenalkan tiga kegiatan terpadu tersebut. Sekolah Menengah Atas Negeri (SMAN) 2 Harau, Kabupaten Lima Puluh Kota merupakan sekolah di bawah naungan Provinsi Sumatera Barat dengan jarak sekitar 138 km dari Jurusan Fisika FMIPA Universitas Andalas tepatnya berada di Kecamatan Harau. Dari informasi yang diperoleh masih terbatasnya sarana dan prasarana seperti jumlah peralatan praktikum. Berdasarkan hal tersebut, tim pengabdian Jurusan Fisika FMIPA Universitas Andalas akan melaksanakan rangkaian kegiatan pengabdian masyarakat di SMA N 2 Harau dengan pemanfaatan media online salah satunya Phet- Simulation. Hasil pengabdian menunjukkan 90 % siswa mengatakan setuju dan sangat setuju bahwa kegiatan seperti ini memberikan manfaat bagi pemahaman materi di bidang Fisika. Kegiatan seperti ini perlu dilakukan lebih banyak oleh Tim Pengabdian sehingga masyarakat merasakan keberadaan perguuruan tinggi yang ada didaerahnya. Kata kunci: PhET Colarado; Simulasi Fisika; dan Pengabdian Masyarakat
SOSIALISASI DAN PEMETAAN POTENSI TANAH LONGSOR MENGGUNAKAN METODE MIKROSEISMIK DAN GEOLISTRIK DI KAWASAN OBJEK WISATA BUKIT NOBITA Marzuki Marzuki; Mutya Vonnisa; Ahmad Fauzi Pohan; Arif Budiman; Imam Taufiq; Trengginas Eka Putra Sutantyo; Elistia Liza Namigo; Dian Milvita; Alimin Mahyudin; Nini Firmawati; Muldarisnur Muldarisnur; Afdal Afdal; Dahyunir Dahlan; M. Ali Shafii; Afdhal Muttaqin; Rico Adrial; Dedi Mardiansyah; Harmadi Harmadi; Zulfi Zulfi; Geby Sri Ayu Oktavia; Fani Anjelina; Nurul Annisa
Jurnal Hilirisasi IPTEKS Vol 6 No 2 (2023)
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jhi.v6i2.655

Abstract

Nobita Hill is one of the areas being developed as a tourist attraction in the city of Padang. Above Nobita Hill is a beautiful view, and you can see the picture of Padang City. However, the hilly topography with steep slopes makes this area prone to landslides. This activity aims to map the potential for landslides on Novita Hill. Activities start from preparation, implementation in the field, and evaluation. Field activities are carried out in two stages. The first stage is an experiment to map the landslide potential. The second stage is socialization. The target audience for this activity is the Village Head of Jua Nan XX Village and its officials and the community around Nobita Hill. The results of the study and mapping were disseminated to the village administration and community leaders involved in the development of the Bukit Nobita tourism area, which was carried out on November 16, 2022. The result of tourist objects often changes land use and cover. However, mitigation of the potential for landslides in this area has never been done. Therefore, the Andalas University Physics Department team mapped the potential for landslides on Novita Hill for six months, using microseismic and geoelectric methods. This activity obtained a map of the distribution of dominant frequencies, a map of the distribution of amplification, and an identification of slip planes concerning the potential for landslides on Nobita Hill. Furthermore, the results of the mapping and mitigation efforts have been disseminated to the village administration and community leaders involved in the development of the Bukit Nobita tourism area. This activity was carried out well. The landslide potential distribution map obtained from this activity is input for the community and stakeholders in developing the Buki Nobita tourist attraction that is safe from disasters.
Co-Authors Adrial, Rico Afdal Afdal Afdal Afdal Afdhal Muttaqin Ahmad Fauzi Pohan Ahmad Rizqy Shubri Ahmad Zul Amal Zaini Alimin Mahyudin Ardian Putra Ariani, Silvi Arif Budiman Arif Budiman Astuti Astuti - Astuti Astuti Astuti Astuti Astuti Astuti Aulya Rahayu Aulya Rahayu, Aulya Ayu Putri Ningsih Ayu Putri Ningsih Dahyunir Dahlan Damayanti, Elok Dea Kurnia Harysandi Dedi Mardiansyah Dian Fitriyani Dian Fitriyani Dian Milvita Dwi Pujiastuti Dwi Pujiastuti Dwi Puryanti Eldiani Arifya Elfira Saufina Elistia Liza Namigo, Elistia Elvaswer Elvaswer Fadilla Monica Fani Anjelina Feriska Handayani Irka, Feriska Handayani Geby Sri Ayu Oktavia Hanifah Azzaura Musyayyadah Hapsoro, Cahyo A. Harmadi Harmadi Harmadi Harmadi Helmi Yusnaini Helmi Yusnaini Hiroyuki Hashiguchi Hiroyuki Hashiguchi Hiroyuki Hashiguchi Hiroyuki Hashiguchi Hiroyuki Hashiguchi Hiroyuki Hashiguchi, Hiroyuki Husnul Ckhotimah Imam Taufik Imam Taufiq Imam Taufiq Indrayani, Wira Iqbal Ramadhan Iqbal Ramadhan L. Luini Lisna Meylani M. Ali Shafii Marzuki Marzuki Marzuki Marzuki Marzuki Marzuki Marzuki, Meqorry Yusfi Meri Yoseva Mohammad Ali Shafii Mora Mora Muhammad Arif Muhammad Arif Muhammad Kahfi Muhammad Kahfi Muldarisnur, Mulda Muzirwan Muzirwan Naela Amalia Zulfa Naela Amalia Zulfa Nini Firmawati Nor Azlan Mohd Aris Novia Dwi Agusri Nurdiana Nurdiana Nurul Annisa Nurul Hasanah Pakhrur Razi Rahmat Rasyid Rahmat Rasyid Ramacos Fardela Ramadani Safitri Ramadhan, Ravidho Ravidho Ramadhan Ravidho Ramadhan Ravidho Ramadhan Rini Oktaviani Saufina, Elfira Shania Ellens Novita Shimomai, Toyoshi Sholihun, Sholihun Silvi Ariani Solly Aryza Sri Handani Sri Oktamuliani Sucy Lestari Wirma Sugeng Nugroho Suryanto, Wiwit Syarifatul Ulfah Toyoshi Shimomai Toyoshi Shimomai Toyoshi Shimomai Toyoshi Shimomai Trengginas Eka Putra Sutantyo Usna, Sri Rahayu Alfitri Veithzal Rivai Zainal Wira Indrayani Yanfatriani, Elsa Yoci Darwita Putri Yusnaini, Helmi Zulfi Zulfi Zulfi Zulkifli Lubis