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All Journal Indonesian Journal of Geospatial Jurnal Inotera
Dudy Darmawan Wijaya
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Computer Science & IT Earth & Planetary Sciences Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Ketelitian Posisi Pengamatan GNSS Metode Precise Point Positioning dan Metode Penentuan Posisi Relatif Rasyad Al Azis; H. F. Suhandri; Dudy Darmawan Wijaya
Indonesian Journal of Geospatial Vol 7 No 2 (2018)
Publisher : Indonesian Journal of Geospatial

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Abstract

Precise Point Positioning (PPP) adalah metode penentuan posisimenggunakan GNSS yang merupakan pengembangan dari metode penentuanposisi absolut. Penentuan posisi menggunakan GNSS yang sering digunakanuntuk memperoleh posisi teliti adalah metode penentuan posisi relatif. Metoderelatif sangat bergantung pada titik referensi. Hal tersebut menyebabkan metodePPP dapat menjadi alternatif karena hanya membutuhkan satu receiver tanpa adaketerkaitan dengan titik referensi. Maka dari itu, studi ini dimaksudkan untukmengetahui seberapa jauh ketelitian metode PPP terhadap metode relatif yangdianggap teliti. Pengamatan dilakukan pada dua buah titik dengan jarak kira-kira8.5 km. Berdasarkan uji coba yang dilakukan, PPP dapat mendekati ketelitianmetode relatif dengan pengamatan minimal selama 6 jam dan menggunakan dataorbit teliti IGS Final.
Assessment of Geodetic Mission Satellite Altimeter Sea Surface Height Data for Developing Marine Gravity Anomaly Models Akbar Wahyu Nugraha; Dudy Darmawan Wijaya
Jurnal Inotera Vol. 9 No. 2 (2024): July - December 2024
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31572/inotera.Vol9.Iss2.2024.ID370

Abstract

Marine gravity anomalies are critical for various applications, including the analysis of oceanic faults, bathymetry prediction, and the development of marine geoids. These anomalies can be measured using shipborne and airborne gravimetry, both of which offer high accuracy and resolution but are limited by their spatial coverage. Conversely, satellite altimetry provides comprehensive global coverage, making it a valuable tool for studying marine gravity anomalies on a larger scale. This research investigates the effectiveness of satellite altimetry in generating marine gravity anomaly data for the eastern Indonesian seas (6°N-6°S and 115°E-135°E). The study employs spectral analysis of Sea Surface Height (SSH) data to identify dominant components and their spatial resolution. Subsequently, the SSH data is used to calculate marine gravity anomalies via the Inverse Vening Meinesz (IVM) method. The accuracy of these satellite-derived anomalies is validated against shipborne gravimetry measurements. Results indicate that satellite altimetry can produce marine gravity anomalies with an accuracy ranging from 4.130 to 9.547 mGal and a spatial resolution of 11.75 kilometers.
Co-Authors Akbar Wahyu Nugraha H. F. Suhandri Rasyad Al Azis