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Related Experiment Video

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A Protocol for Real-time 3D Single Particle Tracking

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Precise Point Positioning Using Triple GNSS Constellations in Various Modes.

Akram Afifi¹, Ahmed El-Rabbany²

¹Department of Civil Engineering, Ryerson University, Toronto, ON M5B 2K3, Canada. akram.afifi@ryerson.ca.

Sensors (Basel, Switzerland)

|May 31, 2016

Summary

This study presents a new dual-frequency precise point positioning (PPP) model combining GPS, Galileo, and BeiDou systems. The between-satellite single-difference (BSSD) model significantly improves convergence time and positioning precision for multi-GNSS applications.

Keywords:

BeiDou GPS Galileo precise point positioning

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Area of Science:

Geodesy and Geomatics Engineering
Satellite Navigation Systems
Geophysical Sciences

Background:

Precise Point Positioning (PPP) is crucial for high-accuracy satellite navigation.
Combining Global Navigation Satellite System (GNSS) constellations like GPS, Galileo, and BeiDou enhances positioning performance.
Inter-system biases and hardware delays present challenges in multi-GNSS PPP models.

Purpose of the Study:

To introduce and validate a novel dual-frequency PPP model integrating GPS, Galileo, and BeiDou observations.
To address and model biases arising from combining multiple GNSS constellations.
To evaluate the performance improvements offered by the new model compared to traditional GPS-only PPP.

Main Methods:

Development of a PPP model based on un-differenced and between-satellite single-difference (BSSD) linear combinations.
Modification of the GPSPace PPP software to handle multi-GNSS data and biases.
Processing of post-processed and real-time data from four IGS stations using IGS-MGEX and IGS RTS products.

Main Results:

The multi-GNSS PPP model improved convergence time by 25% compared to GPS-only solutions.
The BSSD linear combination enhanced positioning parameter precision by approximately 25%.
The BSSD model achieved a 50% reduction in solution convergence time, reaching 10 minutes.

Conclusions:

Combining GPS, Galileo, and BeiDou observations significantly enhances PPP performance.
The BSSD linear combination effectively mitigates receiver-related biases and improves solution quality.
The developed multi-GNSS PPP model offers substantial improvements in convergence speed and positioning accuracy.