A5052857401- GNSS positioning and interference
- Geophysics and Gravity Measurements
- Ionosphere and magnetosphere dynamics
- Inertial Sensor and Navigation
- Earthquake Detection and Analysis
- Geomagnetism and Paleomagnetism Studies
- Atmospheric Ozone and Climate
- Nuclear Physics and Applications
- Satellite Communication Systems
- Atmospheric and Environmental Gas Dynamics
- Historical Geography and Cartography
- Astronomical Observations and Instrumentation
- Electron and X-Ray Spectroscopy Techniques
- Spacecraft Design and Technology
- Solar and Space Plasma Dynamics
- Statistical and numerical algorithms
- Geophysics and Sensor Technology
- Soil Moisture and Remote Sensing
- Ga2O3 and related materials
- Climate variability and models
- Satellite Image Processing and Photogrammetry
- Calibration and Measurement Techniques
- Geographic Information Systems Studies
- Advanced Frequency and Time Standards
- Atmospheric aerosols and clouds
University of Liège
2014-2023
Laboratoire de Géographie Physique
2006-2016
Centre National d'Études Spatiales
2016
Royal Meteorological Institute of Belgium
2007-2010
The paper reviews the current state of GNSS-based detection, monitoring and forecasting ionospheric perturbations in Europe relation to COST action ES0803 "Developing Space Weather Products Services Europe". weather research related studies require broad international collaboration sharing databases, developing analysis software models providing services. Reviewed is European GNSS data basis including services derived products such as Total Electron Content (TEC) radio scintillation indices....
Abstract Improving and homogenizing time space reference systems on Earth and, more specifically, realizing the Terrestrial Reference Frame (TRF) with an accuracy of 1 mm a long-term stability 0.1 mm/year are relevant for many scientific societal endeavors. The knowledge TRF is fundamental navigation sciences. For instance, quantifying sea level change strongly depends accurate determination geocenter motion but also positions continental island stations, such as those located at tide...
An open-source GNSS software receiver allows to have full access the signal processing and make add-ons source code in order obtain desired reflectometry processing. The direct is processed standard way, its tracking loops replica are tapped a robust of reflected master-slave configuration, with very same carrier used correlate signal. In addition, data bit sign wiped off, which extend coherent integration time (CIT) well beyond usual 20-ms limit on way. This having straightforward accurate...
The Far Ultra Violet (FUV) ultraviolet imager onboard the NASA-ICON mission is dedicated to observation and study of ionosphere dynamics at mid low latitudes. We compare O+ density profiles provided by ICON FUV instrument during nighttime with electron measured COSMIC-2 constellation (C2) ground-based ionosondes. Co-located simultaneous observations are compared, covering period from November 2019 July 2020, which produces several thousands coincidences. Manual scaling ionogram sequences...
The effects of the ionosphere remain one main factors which limit precision and reliability many GNSS applications. It is therefore indispensable on hand to improve existing mitigation techniques other assess their remaining weaknesses. Mitigation depend type application considered. Therefore, specific have be developed. paper summarizes work performed this topic in frame WP 3.2 «Mitigation techniques» COST 296.
This paper presents a statistical study of ionospheric small- scale structures detected at the GPS station Brussels (BRUS) from 1994 to 2008. Two types have been detected: Travelling Ionospheric Disturbances (TID's) and so- called "Noise-Like Structures" due geomagnetic storms. The influence such on differential positioning like Real-Time Kinematic (RTK) explored: error ionosphere is larger during storms than occurrence TID's. Maximum values observed for baseline 11 km are respectively 65 cm 15 cm.
Abstract The National Aeronautics and Space Administration Ionospheric Connection Explorer (ICON) mission will study the close relationship between ionosphere, atmospheric weather, space weather using in situ remote sensing instruments proving plasma density, temperature, ion drift velocity, thermospheric wind velocity over equatorial region. In particular, far ultraviolet (FUV) instrument image terrestrial limb two wavelength channels. During nighttime, only channel characterizing bright...