The application of Precise Point Positioning in Geosciences

Abstract

Precise Point Positioning (PPP), an absolute positioning method, is an alternative for conventional relative positioning. Currently the PPP accuracy, is on the level of few-centimetres for static and decimetre for kinematic positioning respectively. However, long convergence time of PPP results is observed. The main goal of this paper is to estimate the accuracy and convergence time when using PPP, and to compare the results with those obtained by other authors. The idea, model and expected accuracy of PPP is discussed in first part of the paper. Adding GLONASS, using method of real-time and using only single frequency are analysed in the frame of recent publications. Numerical analysis is based on gLAB, open source desktop software written in C. Analysis was performed for globally distributed set of 25 stations with observation period of 50 consecutive days, enough to produce statistically relevant results. Analysis of convergence time was done for accuracies between 10 cm and 1 cm. Statistical analysis of accuracy is performed for observation time between 24 h and 1 h. Both statistical parameters and convergence times for different accuracy reveal exponential nature. Considering observation period of 4 hours, few-centimeter convergence may be expected with no significant biases observed. At current state the method overtakes relative positioning in areas where networks of reference stations are not established. The PPP technique may be attractive not only in geodesy, thus, the application possibility in geosciences is analyzed in context of the results.

The Impact of IGS Precise Products in Aircraft Positioning in Air Navigation

“…Przykładem takiego oprogramowania jest aplikacja nawigacja gLAB stosowana do pozycjonowania satelitarnego GNSS w trybie post-processing [16]. Program gLAB (GNSS-Lab Tool) jest powszechnie stosowany w pozycjonowaniu statycznym GNSS [10], pozycjonowaniu kinematycznym GNSS [12], monitoringu stanu troposfery [1] itp. Program gLAB ma szero-kie spektrum zastosowania badawczego, w tym także może być wykorzystywany w nawigacji lotniczej do odtworzenia pozycji statku powietrznego.…”

The Study of Position Accuracy Using Precise Point Positioning (PPP) In Perspective of Indonesian National Standard of Horizontal Reference Network

“…Relative positioning method quality depends on the distance between receivers. In case of PPP, direct usage of reference station is no longer needed, so that the spatial operating range limit is no longer exist, hence the coverage is global [6].…”

Simulation case study of deformations and landslides using real-time GNSS precise point positioning technique

“…The theoretical basis of PPP consists of determining the position of a single receiver using pseudo-range and carrier phase GNSS measurements, together with precise satellite clocks and orbit state models, signal biases and, if possible, atmospheric propagation models derived from a global network. As a consequence, it is the only possible precise technique in isolated areas and it can be used in a remote location to monitor possible landslides and movements or deformations due to CONTACT Raquel M. Capilla racaro@upv.es natural hazards (De Agostino & Piras 2010;Caissy et al 2013;Kalita et al 2014). This topic is also of interest in previous research works, with post-processing PPP (Wang 2013), or in real-time PPP (RT-PPP) approach with or without integer ambiguity resolution (Chen et al 2009).…”