ENHANCEMENT POSITIONING PERFORMANCE USING MODIFIED PRECISE POINT POSITIONING (PPP) SOFTWARE

Abstract

The lack of specialized processing programs for the precise point positioning PPP technique led to not providing optimal solutions for the results. Therefore, the research aims to improve an open-source MATLAB software for processing all available data from the GNSS system constellation in the PPP case. This study applied the modified software to single, dual, and multifrequencies GNSS signals. Fast Fourier Transform (FFT), Butter worth, and Laplace filters are used for frequency separation. The PPP technique improves the absolute position accuracy; the dependence on the control points is unnecessary. The modified software (PPPHE) gives a more significant opportunity for users to use the PPP technique adapting the single-frequency receivers, thus, reducing the cost. Two empirical tests were designed to evaluate the PPPHE performance for the single and dual frequencies. The results assured that integrating the GPS into other GNSS systems (GLONASS, Galileo, and Beido) has significantly improved position accuracy in both single and dual-frequency. Copyright © 2023 by the authors. This article is an open access article distributed under the terms and conditions Creative Commons Attribution-Share Alike 4.0 International Public License (CC BY-SA 4.0)