PENENTUAN DINAMIKA VTEC MENGGUNAKAN GNSS MULTI-KONSTELASI : GPS, GLONASS, GALILEO, DAN BDS

• Main Author: Tezar Al Faruq, Muhammad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/39276
• Institution: Institut Teknologi Bandung

Positioning using Global Navigation Satellite System (GNSS) need several corrections which are applied into the observation data to provide precise position. One of those correction is ionospheric bias. This correction applied because of the GNSS signal propagation through the ionosphere. Ionosphere varies temporally and spatially. The main parameter to obtain the ionospheric correction is Total Electron Content (TEC). Nowadays, TEC can be estimated using GNSS observation data. This research aimed to assess spatio-temporal variations of VTEC from multi constellation GNSS data. VTEC determination is applied on IGS stations which are chosen based on the latitude location (equator, medium, high). The three-months GNSS data contains the multi constellation data including GPS, GLONASS, Galileo, and BDS constellation. According to the research, BDS-GPS combination and GPS only scheme are resulting VTEC with the best deviation over the model and valid on the northern hemisphere stations. The addition of the other two constellations (Galileo and GLONASS) is resulting bigger deviation. GPS-BDS is not reliable for VTEC estimation in the southern hemisphere. VTEC varies spatially based on latitude location. VTEC value increasing as well as the latitude is lowering. Three-months VTEC result indicates diurnal and semidiurnal temporal variations at all stations