ANALISIS KONTRIBUSI MULTI KONSTELASI GNSS DALAM PENENTUAN POSISI METODE STATIK

• Main Author: Ardi Mahdiyantoro, Ridhwan
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/39201
• Institution: Institut Teknologi Bandung

Global Navigation Satellite System (GNSS) is a satellite-based positioning system used for various applications with high accuracy. In Indonesia, GNSS is used for procuring horizontal control networks by using static method. Over time, GNSS technology has increasingly developed into several constellations i.e the American Global Positioning System (GPS), Russia's GLONASS, Europe's Galileo and China's Beidou. The use of four satellite constellations is expected to improve the performance of GNSS-based static positioning, especially in Indonesia, which is located on the equator which can receive signals from geostationary satellites. This research was conducted with the aim to determine the quality of data and how much the contribution of multi GNSS constellations in positioning static method. This research was conducted by using GNSS observation data with varies baseline lengths (short, medium and long baselines) in the ideal area for measurement. The data is then processed to obtain data quality and coordinates quality from each observation point using various processing schemes. Based on these results it was found that each satellite has the same signal to noise ratio (SNR) value, which ranges from 30-60 dBHz to L1 signal, 20-40 dBHz for L2 signal. GLONASS satellites have multipath value that varies from -2 to 2 from low to high elevations. The use of multi constellation GNSS can increase relative accuracy. The use of multi constellation GNSS can also increase precision by 11-18% for easting, 27-19% for northing and 24-29% for height, but there are satellites that disturb the positioning performance. The satellites are GLONASS and Galileo because of the poor constellation in Indonesia with 4-6 average satellites.