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All Journal JRST (Jurnal Riset Sains dan Teknologi) Jurnal Inotera JGISE-Journal of Geospatial Information Science and Engineering Journal of Sciencce Technology and Visual Culture
Een Lujainatul Isnaini
Institut Teknologi Sumatera
Arts Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Comparison of Horizontal Displacement from Horizontal Control Network Adjustment Result Using Observation Model and Time-Variant Methods (Case Study : Horizontal Control Network of Borobudur Temple, Epoch 2002, 2003 and 2012) Een Lujainatul Isnaini; Dwi Lestari
Jurnal Geospasial Indonesia Vol 1, No 1 (2018): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jgise.38472

Abstract

Borobudur Temple is the biggest Buddhist Temple in the world protected by UNESCO. Therefore the periodical maintenance of Borobudur temple become important, deformation study through displacement analysis can be applied for it, by conducting Geodetic observation periodically. The design for Borobudur horizontal monitoring network is a relative one, the control point and monitoring points are in the deformation area. Therefore, the effect of position changes of the control point used in the horizontal network for displacement analysis of Borobudur needs to be considered, as it affects the result for the least square adjustment of the monitoring points. Two different adjustment methods used to overcome this problem, Least square adjustment using observation model and time-variant methods. This research aims to compare the horizontal displacement analysis of Borobudur resulted from these two adjustment methods.  First by giving position correction for the control point at each epoch according to its displacement in least square adjustment using observation model. The second by computing position and velocity vector directly using time-variant method. The comparation of 2D horizontal displacement vector analysis was done by using vector velocity of 2D horizontal displacement from the analysis of the two adjustment methods on the interval displacement epochs between 2002 and 2003 and between 2002 and 2012. This research showed the vector magnitude and the accuration of the displacement from the analysis resulted from the two adjustment methods was different. The resulted of least square adjustment using observation model with correction of control point showed that there was significant increase in magnitude of displacement vector of the monitoring points. Displacement analysis between 2002 and 2003 the magnitude in average were 7.97 mm and the analysis between 2002 and 2012 were 37.78 mmwith consistent displacement direction of the both interval displacement to the northwest. The Time-Variant adjustment method showed an increase in the vector velocity of 2D horizontal displacement from 0.29 mm/year to 0.32 mm/year with different displacement direction. The vector magnitude of the displacement from time variant method was smaller than observation model and the standard deviation for the horizontal displacement from time variant method was slightly bigger about 0.5 mm compared to the observation model.
Segmentasi Sesar Semangko Timur menggunakan Pengukuran Fotogrametri Satrio Muhammad Alif; Muhamad Ilvan Ardiansyah; Muhammad Ulin Nuha; Een Lujainatul Isnaini
JRST (Jurnal Riset Sains dan Teknologi) Volume 6 No. 1 Maret 2022: JRST
Publisher : Universitas Muhammadiyah Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1353.624 KB) | DOI: 10.30595/jrst.v6i1.10769

Abstract

Sesar Semangko dengan panjang 65 km merupakan wilayah yang aktif secara tektonik dan terletak di Provinsi Lampung. Sesar Semangko terbagi menjadi dua: Sesar Semangko Barat dan Sesar Semangko Timur. Segmentasi sesar Semangko Timur terlihat terputus dari citra satelit dengan resolusi spasial 30 meter ketika melalui Kota Agung karena terjadi sedimentasi. Penelitian ini bertujuan mendapatkan segmentasi sesar Semangko Timur menggunakan pengukuran fotogrametri dengan resolusi spasial yang jauh lebih baik dibandingkan citra dari satelit. Data yang digunakan adalah data pengukuran fotogrametri dan Global Navigation Satellite System (GNSS) di wilayah dengan luas 100 hektar di lokasi terputusnya sesar Semangko Timur di Kota Agung, Tanggamus. Pengukuran fotogrametri dilakukan dengan menggunakan tinggi terbang sebesar 100 meter. Segmentasi sesar dilakukan dari DSM hasil pengolahan fotogrametri dengan mendefinisikan perbedaan nilai kelerengan di sesar Semangko Timur sebelum terputus dan diterapkan di lokasi penelitian dengan ciri serupa. Nilai kelerengan diperoleh dengan pembuatan kontur dari DSM. Kualitas produk DSM hasil pengukuran fotogrametri mencapai 12,4 cm untuk ketelitian horizontal dan 36 cm untuk ketelitian vertikal. Segmentasi sesar Semangko Timur yang tergambarkan dengan pengukuran fotogrametri yaitu sepanjang 100 meter di tutupan lahan persawahan.
Penentuan Zenith Tropospheric Delay Menggunakan Data CORS GNSS Een Lujainatul Isnaini; Redho Surya Surya Perdana
Journal of Science, Technology, and Visual Culture Vol 1 No 2 (2021): Oktober 2021
Publisher : Jurusan Teknologi Produksi dan Industri, Institut Teknologi Sumatera

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Signal propagation from the GNSS satellite in the form of electromagnetic waves to the receiver through the atmospheric medium causes atmospheric bias, both ionospheric and tropospheric bias caused by changes in the medium in the atmospheric layer, and signal delays. The slowing down of the signal in the troposphere is known as the Zenith Tropospheric Delay (ZTD). The bias or interference must be eliminated to obtain an accurate position. However, this information is useful in meteorological studies to provide an overview of atmospheric conditions. This study determines the estimated value of the ZTD from the observation data of the CORS GNSS station. Data processing is carried out using the PPP method through an online platform. The results of this processing, besides obtaining the CORS station position, the ZTD value and its standard deviation are also obtained. The estimated ZTD value for each CORS station is different due to the different atmospheric conditions (weather) in ​​each station's area.
Analisis Kesesuaian Lahan SPBU di Bandar Lampung Menggunakan Sistem Informasi Geografis Vanisa Aufa Maharani; Meraty Ramadhini; Misfallah Nurhayati; Muhammad Ario Eko Rahadianto; Een Lujainatul Isnaini
Jurnal Inotera Vol. 8 No. 2 (2023): July - December 2023
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31572/inotera.Vol8.Iss2.2023.ID276

Abstract

Bandar Lampung is identified as one of the densely populated urban center in Indonesia. As the population increases, the ownership of motorized vehicles using gasoline is also on the rise. This has led to a growth in the construction of fuel stations, which needs to be examined from various aspects, one of which is land suitability. This research aims to identify the distribution of fuel stations, determine the parameters used, and analyze the level of suitability of fuel stations in Bandar Lampung. The spatial data used in this study includes the National Spatial Plan of Bandar Lampung for the period 2021-2041 and the coordinates of fuel stations in Bandar Lampung. Additionally, non-spatial data such as questionnaire results and field validations are also utilized. The methods applied are the Analytical Hierarchy Process (AHP) and overlay. Based on the results obtained, there are 33 fuel station scattered across 17 out of 20 districts in Bandar Lampung and there are three districts that do not yet have fuel stations namely Tanjung Karang Barat, Tanjung Karang Timur, and Teluk Betung Barat. The parameters used in this study are four: road function, distance between fuel stations, distance of fuel stations to residential areas, and areas prone to landslide disasters. The level of suitability of fuel stations is classified into three categories: highly suitable, suitable, and less suitable. Out of the 33 fuel stations, 32 are classified as very suitable, and 1 is classified as suitable.
Co-Authors Adam Irwansyah Fauzi Dwi Lestari Meraty Ramadhini Misfallah Nurhayati Muhamad Ilvan Ardiansyah Muhammad Ario Eko Rahadianto Muhammad Fikri Muhammad Ulin Nuha Redho Surya Perdana Redho Surya Surya Perdana Satrio Muhammad Alif Vanisa Aufa Maharani