Next Article in Journal
A 3-Axis Miniature Magnetic Sensor Based on a Planar Fluxgate Magnetometer with an Orthogonal Fluxguide
Next Article in Special Issue
Mass and Force Sensing of an Adsorbate on a Beam Resonator Sensor
Previous Article in Journal
Gaze-Assisted User Intention Prediction for Initial Delay Reduction in Web Video Access
Previous Article in Special Issue
Inertial Sensor-Based Touch and Shake Metaphor for Expressive Control of 3D Virtual Avatars
Article Menu

Export Article

Open AccessArticle
Sensors 2015, 15(6), 14701-14726; doi:10.3390/s150614701

Performance Analysis of Several GPS/Galileo Precise Point Positioning Models

Department of Civil Engineering, Ryerson University, Toronto, ON M5B 2K3, Canada
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M.N. Passaro
Received: 29 April 2015 / Revised: 11 June 2015 / Accepted: 12 June 2015 / Published: 19 June 2015
(This article belongs to the Special Issue Inertial Sensors and Systems)

Abstract

This paper examines the performance of several precise point positioning (PPP) models, which combine dual-frequency GPS/Galileo observations in the un-differenced and between-satellite single-difference (BSSD) modes. These include the traditional un-differenced model, the decoupled clock model, the semi-decoupled clock model, and the between-satellite single-difference model. We take advantage of the IGS-MGEX network products to correct for the satellite differential code biases and the orbital and satellite clock errors. Natural Resources Canada’s GPSPace PPP software is modified to handle the various GPS/Galileo PPP models. A total of six data sets of GPS and Galileo observations at six IGS stations are processed to examine the performance of the various PPP models. It is shown that the traditional un-differenced GPS/Galileo PPP model, the GPS decoupled clock model, and the semi-decoupled clock GPS/Galileo PPP model improve the convergence time by about 25% in comparison with the un-differenced GPS-only model. In addition, the semi-decoupled GPS/Galileo PPP model improves the solution precision by about 25% compared to the traditional un-differenced GPS/Galileo PPP model. Moreover, the BSSD GPS/Galileo PPP model improves the solution convergence time by about 50%, in comparison with the un-differenced GPS PPP model, regardless of the type of BSSD combination used. As well, the BSSD model improves the precision of the estimated parameters by about 50% and 25% when the loose and the tight combinations are used, respectively, in comparison with the un-differenced GPS-only model. Comparable results are obtained through the tight combination when either a GPS or a Galileo satellite is selected as a reference. View Full-Text
Keywords: ambiguity; PPP; GPS; Galileo; BSSD; decoupled clock ambiguity; PPP; GPS; Galileo; BSSD; decoupled clock
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Afifi, A.; El-Rabbany, A. Performance Analysis of Several GPS/Galileo Precise Point Positioning Models. Sensors 2015, 15, 14701-14726.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top