Journal ArticleDOI
Assessment of NeQuick ionospheric model for Galileo single-frequency users
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TLDR
The aim of this paper is performance assessment of the ionospheric model NeQuick, adopted by the European GNSS Galileo for single frequency receivers, and the analysis is performed in measurements domain.Abstract:
The ionosphere is the main error source in GNSS measurements and in extreme cases can degrade the positioning significantly, with errors exceeding 100 m; therefore, modelling and predicting of this type of error is crucial and critical. The ionospheric effect can be reduced using different techniques, such as dual-frequency receiver or suitable augmentation system (DGPS, SBAS); the aforesaid approaches involve the use of expensive devices and/or complex architectures. Single frequency stand-alone receivers are the cheapest and most widespread GNSS devices; they can estimate and partially correct the error due to the ionosphere, through adequate algorithms, which use parameters broadcasted by the navigation message. The aim of this paper is performance assessment of the ionospheric model NeQuick, adopted by the European GNSS Galileo for single frequency receivers. The analysis is performed in measurements domain and the data are collected in different geographical locations and in various geomagnetic conditions.read more
Citations
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Journal ArticleDOI
Accuracy of ionospheric models used in GNSS and SBAS: methodology and analysis
TL;DR: The present study proposes a methodology based on the comparison of the predictions of any ionospheric model with actual unambiguous carrier-phase measurements from a global distribution of permanent receivers that appears to be a useful tool to improve current ionsospheric models.
Journal ArticleDOI
Performance evaluation of real-time global ionospheric maps provided by different IGS analysis centers
Xiaodong Ren,Xiaodong Ren,Jun Chen,Jun Chen,Xingxing Li,Xiaohong Zhang,Xiaohong Zhang,Mohamed Freeshah +7 more
TL;DR: In this paper, the authors evaluate the performance of RT-GIMs and 1-day predicted ionospheric products (C1PG GIM) over oceanic regions.
Journal ArticleDOI
Benefit of the NeQuick Galileo Version in GNSS Single-Point Positioning
TL;DR: The aim of this paper is the performance assessment in single point positioning of the NeQuick Galileo version provided by ESA and the comparison with respect to the Klobuchar model used for GPS.
Journal ArticleDOI
Refinement of global ionospheric coefficients for GNSS applications: Methodology and results
TL;DR: The methodology developed here takes the advantage of high-quality ionospheric TECs derived from the global network of GNSS receivers to improve the performance of various single-frequency GNSS applications.
References
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Global Positioning System : Theory and Applications I
TL;DR: Differential GPS and Integrity Monitoring differential GPS Pseudolites Wide Area Differential GPS Wide Area Augmentation System Receiver Autonomous Integrity Monitoring Integrated Navigation Systems Integration of GPS and Loran-C GPS and Inertial Integration Receiver Aut autonomous Integrity Monitoring Availability for GPS Augmented with Barometric Altimeter Aiding and Clock Coasting
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Global positioning system : theory and applications
TL;DR: Differential GPS and Integrity Monitoring Differential GPS Pseudolites Wide Area differential GPS Wide Area Augmentation System Receiver Autonomous Integrity Monitoring Integrated Navigation Systems Integration of GPS and Loran-C GPS and Inertial Integration Receiver Autonomic Integrity Monitoring Availability for GPS Augmented with Barometric Altimeter Aiding and Clock Coasting GPS and Global Navigation Satellite System (GLONASS) GPS Navigation Applications Land Vehicle Navigation and Tracking Marine Applications Applications of the GPS to Air Traffic Control GPS Applications in General Aviation Aircraft Automatic Approach and Landing of Aircraft Using Integrity Beacons Spacecraft Attitude
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TL;DR: In this paper, the origins of GPS are discussed and the development of global surveying techniques are discussed. But the authors focus on the use of global positioning techniques and do not address the issues of accuracy and access of GPS data.