STUDI AWAL TINGKAT AKURASI DAN RESOLUSI ANOMALI GAYABERAT DI LAUTAN INDONESIA DARI DATA SATELIT ALTIMETRI

• Main Author: Stevanus Fahrezza Pramainant, R
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/40099
• Institution: Institut Teknologi Bandung

Refers to the Peraturan Kepala Badan Informasi Geospasial nomor 15 tahun 2013 tentang Sistem Referensi Geospasial Indonesia (Regulation of the Head of the Geospatial Information Agency Number 15 of 2013 concerning the Indonesian Geospatial Reference System), geoid was designated as a Geospatial Vertical Reference System. In fact, there hasn’t been thorough geoid model yet in Indonesia, leaving an interesting issue to discusss. Geoid model is conventionally preceded by the measurement of gravity anomalies by shipborne, which requires a lot of time and costs. Based on this consideration, altimetry satellites are used, as providers of alternative gravity anomaly data at sea, faster and more efficient, using geoid slope, least-squares collocation, and fast fourier transformation method. CryoSat-2, ERS-1, Jason 1, and SARAL-AltiKa, Geodetic Mission data types, are used in this research. Altimetry satellites are capable of providing gravity anomalies at 11-25 km as optimal spatial resolution. Validation using shipborne gravimeter shows that altimetries provide good spectral resolution, with an average RMS of 5-15 mGal. To improve work effectiveness, the results show that the use of Cryosat-2 (single satellite) produces the same resolution and accuracy as multi-satellite use.