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Béniguel, Y.
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- PublicationOpen AccessScintillations effects on satellite to Earth links for telecommunication and navigation purposes(2004)
; ; ; ; ; ; ;Béniguel, Y.; IEEA, Courbevoie, France ;Forte, B.; The Abdus Salam International Centre for Theoretical Physics (ICTP), Aeronomy and Radiopropagation Laboratory, Trieste, Italy ;Radicella, S. M.; The Abdus Salam International Centre for Theoretical Physics (ICTP), Aeronomy and Radiopropagation Laboratory, Trieste, Italy ;Strangeways, H. J.; University of Leeds, U.K. ;Gherm, V. E.; University of St. Petersburg, Russia ;Zernov, N. N.; University of St. Petersburg, Russia; ; ; ; ; Radio wave scintillations are rapid fluctuations in both amplitude and phase of signals propagating through the atmosphere. GPS signals can be affected by these disturbances which can lead to a complete loss of lock when the electron density strongly fluctuates around the background ionization level at small spatial scales. This paper will present recent improvements to the theoretical Global Ionospheric Scintillation Model (GISM), particularly tailored for satellite based navigation systems such GPS coupled with Satellite Based Augmentation System (SBAS). This model has been improved in order to take into account GPS constellation, signals, and receiver response to ionospheric scintillation environments. A new modelling technique, able to describe the scintillation derived modifications of transionospheric propagating fields is shown. Results from GPS derived experimental measurements performed at high and low magnetic latitudes will show preliminary assessments of the scintillation impact on real receivers and system operations. Nevertheless, comparisons between theoretical scintillation models, such as WBMOD and GISM, with GPS derived experimental data will be shown.333 1128 - PublicationOpen AccessIonospheric scintillation monitoring and modelling(2009-08)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;Béniguel, Y.; IEEA, Paris, France ;Romano, V.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Alfonsi, Lu.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Aquino, M.; Institute of Engineering Surveying and Space Geodesy, IESSG, Nottingham, UK ;Bourdillon, A.; IETR Université de Rennes 1, France ;Cannon, P.; Qinetiq, Malvern, UK ;De Franceschi, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Dubey, S.; DLR, Neustrelitz, Germany ;Forte, B.; University of Nova Gorica, Slovenia ;Gherm, V.; University of St Petersburg, Russia ;Jakowski, N.; DLR, Neustrelitz, Germany ;Materassi, M.; Institute for Complex Systems, National Council of Researches, Firenze, Italy ;Noack, T.; DLR, Neustrelitz, Germany ;Pozoga, M.; Space Research Center, Warsaw, Poland ;Rogers, N.; Qinetiq, Malvern, UK ;Spalla, P.; Institute for Complex Systems, National Council of Researches, Firenze, Italy ;Strangeways, H. J.; School of Electronic and Electrical Engineering, University of Leeds, UK ;Warrington, E. M.; Department of Engineering, University of Leicester, UK ;Wernik, A.; Space Research Center, Warsaw, Poland ;Wilken, V.; DLR, Neustrelitz, Germany ;Zernov, N.; University of St Petersburg, Russia; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; This paper presents a review of the ionospheric scintillation monitoring and modelling by the European groups involved in COST 296. Several of these groups have organized scintillation measurement campaigns at low and high latitudes. Some characteristic results obtained from the measured data are presented. The paper also addresses the modeling activities: four models, based on phase screen techniques, with different options and application domains are detailed. Finally some new trends for research topics are given. This includes the wavelet analysis, the high latitudes analysis, the construction of scintillation maps and the mitigation techniques.662 1252 - PublicationRestrictedMonitoring, tracking and forecasting ionospheric perturbations using GNSS techniques(2012-12-20)
; ; ; ; ; ; ; ; ; ;Jakowski, N.; German Aerospace Center, Institute of Communications and Navigation, Neustrelitz, Germany ;Béniguel, Y.; IEEA, Paris, Courbevoie, France ;De Franceschi, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Pajares, M. H.; Universitat Politecnica de Catalunya, Res. group of Astronomy and Geomatics, Barcelona, Spain ;Jacobsen, K. S.; Norwegian Mapping Authority, Geodetic Institute, Hønefoss, Norway ;Stanislawska, I.; Space Research Center PAS, Warsaw, Poland ;Tomasik, L.; Space Research Center PAS, Warsaw, Poland ;Warnant, R.; University of Liege, Unit of Geomatics – Geodesy and GNSS, Belgium ;Wautelet, G.; University of Liege, Unit of Geomatics – Geodesy and GNSS, Belgium; ; ; ; ; ; ; ; The paper reviews the current state of GNSS-based detection, monitoring and forecasting of ionospheric perturbations in Europe in relation to the COST action ES0803 ‘‘Developing Space Weather Products and Services in Europe’’. Space weather research and related ionospheric studies require broad international collaboration in sharing databases, developing analysis software and models and providing services. Reviewed is the European GNSS data basis including ionospheric services providing derived data products such as the Total Electron Content (TEC) and radio scintillation indices. Fundamental ionospheric perturbation phenomena covering quite different scales in time and space are discussed in the light of recent achievements in GNSS-based ionospheric monitoring. Thus, large-scale perturbation processes characterized by moving ionization fronts, wave-like travelling ionospheric disturbances and finally small-scale irregularities causing radio scintillations are considered. Whereas ground and space-based GNSS monitoring techniques are well developed, forecasting of ionospheric perturbations needs much more work to become attractive for users who might be interested in condensed information on the perturbation degree of the ionosphere by robust indices. Finally, we have briefly presented a few samples illustrating the space weather impact on GNSS applications thus encouraging the scientific community to enhance space weather research in upcoming years.431 65