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The Mechanism for GNSS-Based Kinematic Positioning Degradation at High-Latitudes Under the March 2015 Great Storm
(2022-06)
Article
Open AccessIn this study, we focus on the kinematic precise point positioning (PPP) solutions at high-latitudes during the March 2015 great geomagnetic storm. We aim to discover the mechanism behind the positioning degradation from ... -
Network-based ionospheric gradient monitoring to support GBAS
(2021-02-11)
Article
Open AccessLarge ionospheric gradients acting between a Ground Based Augmentation System (GBAS) reference station and an aircraft on approach could lead to hazardous position errors if undetected. Current GBAS stations provide solutions ... -
Cloud-based single-frequency Snapshot RTK positioning
(Multidisciplinary Digital Publishing Institute (MDPI), 2021-05-26)
Article
Open AccessWith great potential for being applied to Internet of Things (IoT) applications, the concept of cloud-based Snapshot Real Time Kinematics (SRTK) was proposed and its feasibility under zero-baseline configuration was confirmed ... -
Effect of the polar cap ionospheric sporadic-E layer on GNSS-based positioning: a case study at Resolute Bay, Canada, September 5, 2012
(2022-04)
Article
Restricted access - publisher's policyWe focus on the impacts of the polar cap ionospheric sporadic-E (Es) layer that occurred at Resolute Bay, Canada, on September 5, 2012, on the quality of the Global Positioning System (GPS) observable and the positioning ... -
A multi-frequency method to improve the long-term estimation of GNSS clock corrections and phase biases
(2021-12)
Article
Open AccessThe space segment of the Global Navigation Satellite System (GNSS) is equipped with highly stable atomic clocks. In order to use these clocks as references, their time offsets must be estimated from ground measurements as ... -
Ionospheric corrections tailored to the Galileo High Accuracy Service
(2021-12)
Article
Open AccessThe Galileo High Accuracy Service (HAS) is a new capability of the European Global Navigation Satellite System that is currently under development. The Galileo HAS will start providing satellite orbit and clock corrections ... -
Analysis of ‘Pre-Fit’ Datasets of gLAB by Robust Statistical Techniques
(MDPI AG, 2021-05-24)
Article
Open AccessThe GNSS LABoratory tool (gLAB) is an interactive educational suite of applications for processing data from the Global Navigation Satellite System (GNSS). gLAB is composed of several data analysis modules that compute the ... -
Galileo broadcast ephemeris and clock errors analysis: 1 January 2017 to 31 July 2020
(Multidisciplinary Digital Publishing Institute (MDPI), 2020-11-29)
Article
Open AccessA preliminary analysis of Galileo F/NAV broadcast Clock and Ephemeris is performed in this paper with 43 months of data. Using consolidated Galileo Receiver Independent Exchange (RINEX) navigation files, automated navigation ... -
Improvement of global ionospheric VTEC maps by using kriging interpolation technique
(2005-07-07)
Article
Open AccessIn this work, a geostatistic interpolation algorithm, called kriging, has been applied to improve the Technical University of Catalonia (UPC) global ionospheric maps (GIMs) computed with GPS data. This new UPC GIM, from ... -
An overview of methodologies for real-time detection, characterisation and tracking of traveling ionospheric disturbances developed in the TechTIDE project
(2020-08-04)
Article
Open AccessThe main objective of the TechTIDE project (warning and mitigation technologies for travelling ionospheric disturbances effects) is the development of an identification and tracking system for travelling ionospheric ... -
Galileo Ionospheric Correction Algorithm Integration into the Open-Source GNSS Laboratory Tool Suite (gLAB)
(Multidisciplinary Digital Publishing Institute (MDPI), 2021-01-07)
Article
Open AccessUsers of the global navigation satellite system (GNSS) operating with a single-frequencyreceiver must use an ionospheric correction algorithm (ICA) to account for the delay introduced onradio waves by the upper atmosphere. ... -
Removing day-boundary discontinuities on GNSS clock estimates: methodology and results
(2021-04)
Article
Open AccessGlobal navigation satellite system (GNSS) satellites are equipped with very stable atomic clocks that can be used for assess-ing the models and strategies involved in the estimation processes, where the clock estimates ...
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