Mukmin, Muchammad Faisal (2025) Analisis Pergerakan Akibat Pasang Surut Bumi Padat Menggunakan Data GNSS 2023 - 2024 Metode Kinematic Precise Point Positioning (Studi Area : Jawa Timur). Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Bumi merupakan planet yang dinamis dan pergerakannya dipengaruhi oleh banyak faktor, salah satunya adalah gaya gravitasi antara bumi dengan bulan dan matahari atau disebut lunisolar gravitational attraction (LGA). Gaya ini menyebabkan terjadinya fenomena pasang surut yang merupakan respon bumi berupa naik turunnya suatu badan permukaan akibat gaya gravitasi benda-benda langit dan memiliki banyak tipe seperti pasang surut bumi (Earth Tides), pasang surut atmosfer (Atmospheric Tides), serta pasang surut air laut (Ocean Tides). Solid earth tides merupakan respon utama dari pergerakan elastis dan variasi lokal kenampakan bumi yang dapat dimanfaatkan untuk menyelidiki struktur bagian dalam bumi. Selain itu, terdapat respon lain berupa pergerakan pada bumi padat yang disebabkan oleh redistribusi massa air terkait dengan pasang surut air laut dan disebut sebagai ocean tides loading (OTL). Walaupun nilai pergerakannya berada di orde sentimeter, pasang surut bumi memiliki dampak yang cukup signifikan terlebih dalam pengukuran menggunakan perangkat geodetik seperti VLBI dan GNSS. Penelitian Tugas Akhir ini memberikan analisis mengenai pasang surut bumi padat yang dihasilkan dari pengolahan data GNSS di 20 stasiun pengamatan InaCORS Jawa Timur menggunakan perangkat lunak saintifik GipsyX-2.1. Untuk menghilangkan efek pergerakan sekuler bumi dilakukan proses detrending data. Uji statistik berupa perhitungan RMSE dilakukan untuk menentukan karakteristik kesesuaian hasil pengolahan berdasarkan KPPP dengan model SET global IERS2010. Dari penelitian ini didapatkan nilai RMSE terbesar untuk perbandingan data dan model berada pada komponen U stasiun CSMN dengan nilai 0,0781 m dan RMSE rata-rata untuk komponen vertikal berada pada angka 0,0553 m. Dari hasil pengolahan koordinat KPPP dilakukan analisis harmonik menggunakan FFT untuk mendapatkan nilai amplitudo dan fase konstanta pasang surut bumi.
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Earth is a dynamic planet and influenced by many factors, one of which is the gravitational force between the Earth, the Moon, and the Sun or commonly referred to as lunisolar gravitational attraction (LGA). This force induces tidal phenomena which are manifested as periodic vertical displacements of the Earth's surface due to celestial gravitational forces These phenomena include different types of tides such as Earth Tides, Atmospheric Tides, and Ocean Tides. Solid earth tides represent the primary response of the Earth's elastic deformation and local surface variations and can be utilized to investigate the internal structure of the planet. Another related phenomenon is the movement of the solid earth caused by the redistribution of oceanic mass, referred to as Ocean Tide Loading (OTL). Although the magnitude of these displacements is typically on the order of centimeters, Earth tides have a significant impact, particularly on geodetic measurements such as those obtained from VLBI and GNSS. This undergraduate thesis presents an analysis of solid Earth tides based on GNSS data processing from 20 InaCORS observation stations across East Java, using the scientific software GipsyX-2.1. To remove the effects of secular terrestrial motion, the data were subjected to a detrending process. A statistical evaluation using Root Mean Square Error (RMSE) was conducted to assess the agreement between the processed Kinematic Precise Point Positioning (KPPP) data and the global standard tidal model IERS2010. The highest RMSE value between the GNSS-derived data and the model was found in the vertical (U) component at station CSMN, with a value of 0.0781 m, while the average RMSE for the vertical component across all stations was 0.0553 m. Furthermore, harmonic analysis was conducted on the KPPP-derived coordinate time series using Fast Fourier Transform (FFT) to extract the amplitude and phase values of the solid Earth tidal constituents.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | GipsyX, InaCORS, Konstanta Pasang Surut, OTL, Pasang Surut Bumi, GipsyX, InaCORS, OTL, Solid Earth Tides, Tidal Constituents |
| Subjects: | G Geography. Anthropology. Recreation > G Geography (General) > G109.5 Global Positioning System G Geography. Anthropology. Recreation > GB Physical geography G Geography. Anthropology. Recreation > GB Physical geography > GB651 Subsidences (Earth movements) |
| Divisions: | Faculty of Civil Engineering and Planning > Geomatics Engineering > 29202-(S1) Undergraduate Thesis |
| Depositing User: | Muchammad Faisal Mukmin |
| Date Deposited: | 25 Jul 2025 03:31 |
| Last Modified: | 25 Jul 2025 03:31 |
| URI: | http://repository.its.ac.id/id/eprint/121464 |
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