Now showing items 1-20 of 117

• #### A Kinematic campaign to evaluate EGNOS 1046 maritime service ﻿

(ION Publications (The Institute of navigation), 2019)
Conference report
Open Access
Global Navigation Satellite Systems (GNSSs) have improved the efficiency and accuracy of transportation means. In terms of safety, the European Geostationary Navigation Overlay System (EGNOS) is providing vertical and ...
• #### A method for scintillation characterization using geodetic receivers operating at 1 Hz ﻿

(2017-05-08)
Article
Open Access
Ionospheric scintillation produces strong disruptive effects on global navigation satellite system (GNSS) signals, ranging from degrading performances to rendering these signals useless for accurate navigation. The current ...
• #### A methodology to assess ionospheric models for GNSS ﻿

(2015)
Conference lecture
Restricted access - publisher's policy
• #### A multi-frequency method to improve the long-term estimation of GNSS clock corrections and phase biases ﻿

(2021-12)
Article
Open Access
The 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 ...
• #### A new approach to improve satellite clock estimates, removing the inter-day jumps ﻿

(2020)
Conference report
Restricted access - publisher's policy
Time synchronization is one of the main applications of Global Navigation Satellite System (GNSS). Indeed, GNSS satellites are equipped with highly stable atomic clocks, which can be used as clock references. In particular, ...
• #### A real-time world-wide ionospheric model for single and multi-frequency precise navigation ﻿

Conference lecture
Restricted access - publisher's policy
The ionosphere plays an important role in satellite-based navigation, either in standard navigation, with single frequency mass-market receivers, or in precise navigation, with dual frequency receivers. In this work, the ...
• #### A Worldwide ionospheric model for fast precise point positioning ﻿

(Institute of Electrical and Electronics Engineers (IEEE), 2015-03-03)
Article
Open Access
Fast precise point positioning (Fast-PPP) is a satellite-based navigation technique using an accurate real-time ionospheric modeling to achieve high accuracy quickly. In this paper, an end-to-end performance assessment of ...
• #### AATR an ionospheric activity indicator specifically based on GNSS measurements ﻿

(2018-03-01)
Article
Open Access
This work reviews an ionospheric activity indicator useful for identifying disturbed periods affecting the performance of Global Navigation Satellite System (GNSS). This index is based in the Along Arc TEC Rate (AATR) and ...
• #### Accuracy of ionospheric models used in GNSS and SBAS: methodology and analysis ﻿

(2016-03-01)
Article
Restricted access - confidentiality agreement
© 2015, Springer-Verlag Berlin Heidelberg. The characterization of the accuracy of ionospheric models currently used in global navigation satellite systems (GNSSs) is a long-standing issue. The characterization remains a ...
• #### Application of tomographic ionospheric corrections in WADGPS networks for real-time estimation of integrated water vapour ﻿

(Instituto de Navegacion de España, 2021)
Conference report
Open Access
In recent years several authors have developed strategies that estimate the Integrated Water Vapor (IWV), proportional to the Zenith Tropospheric Delay (ZTD), in near real time --i.e. with a delay of one hour or more--. ...
• #### Assessing the quality of ionospheric models through GNSS positioning error: methodology and results ﻿

(2020-01-01)
Article
Open Access
Single-frequency users of the global navigation satellite system (GNSS) must correct for the ionospheric delay. These corrections are available from global ionospheric models (GIMs). Therefore, the accuracy of the GIM is ...
• #### Automated GPS Signal-in-Space anomalies monitoring over more than 11 years ﻿

(ION Publications (The Institute of navigation), 2019)
Conference report
Restricted access - author's decision
• #### Basic Research Utilities for SBAS (BRUS) ﻿

(2003-02)
Conference report
Open Access
The software package BRUS (Basic Research utilities for SBAS) to process WAAS and EGNOS data is being developed by gAGE/UPC. Some of the main characteristics of BRUS are its architecture design and functionalities that ...
• #### Building links between Europe and South-East Asia in the field of EGNSS: the BELS project and the Navis ﻿

(2015)
Conference report
Open Access
South East Asia is growing at an impressive pace with its GDP having increased by about 350% in ten years , ri sing from 650 Billion $in 2002 to about 2300 Billion$ in 2012. Regional governments actively promote ...
• #### Characterization and modelling of the ionosphere for EGNOS development and qualification ﻿

(2013)
Conference lecture
Restricted access - publisher's policy
The availability of representative data samples, models and statistical information derived from the analysis of parameters that adequately describe the state of the ionosphere are key elements for the design, verification ...
• #### Climatology of High and Low Latitude Scintillation in the Last Solar Cycle by Means of the Geodetic Detrending Technique ﻿

(ION Publications (The Institute of navigation), 2020)
Conference report
Restricted access - publisher's policy
Signals from a Global Navigation Satellite System (GNSS) can be disturbed along the propagation ray path from the satellites to the receivers. The presence of irregularities in the electron density in the near-Earth space ...
• #### Cloud-based single-frequency Snapshot RTK positioning ﻿

(Multidisciplinary Digital Publishing Institute (MDPI), 2021-05-26)
Article
Open Access
With 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 ...
• #### Consolidated characterisation of an ionospheric indicator for the definition of EGNOS Ionospheric Conditions ﻿

(2014-04-29)
Research report
Restricted access - confidentiality agreement
• #### D.01. GPS-DF FE characterisation report ﻿

(2018-01-14)
Research report
Restricted access - confidentiality agreement
• #### Data gathering and methodology ﻿

(2018-10-31)
Research report
Open Access
The aim of this WP5 is to specify the impact of TID in EGNOS, N-RTK and HF systems through statistical correlation of the performance data recorded from system operators and of TID detection results. The analysis will be ...