PERFORMANCE STUDY OF THE PRECISE POINT POSITIONING (PPP) METHOD USING CORRECTIONS BASED ON THE MULTI-GNSS CONSTELLATION IN INDONESIA

• Main Author: Agung Primantaka, Wahyu
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/73730
• Institution: Institut Teknologi Bandung

<p align="justify">One of the survey methods of the Global Navigation Satellite System (GNSS) which has a high level of accuracy is Precise Point Positioning (PPP). This method can produce point coordinates to cm accuracy using a single receiver. These results can be obtained using time and orbit corrections, as well as using ionospheric free linear combinations to eliminate various GNSS observation errors. This study aims to see a comparison of the results of PPP processing coordinates with various combinations of GNSS constellations in Indonesia. These results can be used as a form of evaluating the performance of the PPP method to consider using PPP as an alternative positioning method in Indonesia. Performance tests were carried out using Geospatial Information Agency (BIG) Continuously Operating Reference Station (CORS) data from 16 points spread throughout Indonesia on day of year (DoY) 1-7 in 2022. The processing was carried out using the RTKLib software version 2.4 .3 b34 using time and orbit correction from CNES/CLS. The results of the PPP coordinates of each point will be compared with the CORS BIG coordinates in epoch 2021. The results show that the use of a combination of the GNSS, GPS-GLO, and GPS- GAL constellations will produce the expected accuracy of PPP coordinates (horizontal and vertical), namely 3-5 cm with a constant, both spatially and temporally. The results with the use of a single satellite show quite large coordinate accuracy, namely in the range of dm to m, which varies spatially and temporally. Convergence time for the use of a combination of dual-constellations and a full combination has a relatively fast convergence time range. The use of a single satellite has several test data that does not meet the convergence time. From these results, the performance of using PPP for positioning in Indonesia will be more optimum using a combination of several satellite constellations, especially with the GPS-GLO-GAL combination.