Exploració per autor "Hernández Pajares, Manuel"
Ara es mostren els items 101-120 de 202
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Long-baseline (> 400Km) on the fly ambiguity resolution using ionospheric corrections with high geomagnetic activity
(2001)
Comunicació de congrés
Accés obertA procedure for resolving carrier phase ambiguities, even under unfavorable geomagnetic conditions, has been tested. Precise ionospheric corrections have been made using dual-frequency data from control stations. Successful ... -
Long-term comparison of the ionospheric F2 layer electron density peak derived from ionosonde data and Formosat-3/COSMIC occultations
(2015-06-15)
Article
Accés obertElectron density profiles (EDPs) derived from GNSS radio occultation (RO) measurements provide valuable information on the vertical electron density structure of the ionosphere and, among others, allow the extraction of ... -
Looking for efficient and accurate ways of computing the global ionospheric electron density distribution from huge amounts of GNSS observations
(2011)
Presentació
Accés obertIn this work the authors will explore different potential ways of estimating efficiently and accurately the global number density of ionospheric free electrons from the most part of nowadays available GNSS ... -
Mejora de la transformada inversa de Abel: aplicación ocultaciones ionosféricas de COSMIC/FORMOSAT-3
(2008-09-24)
Comunicació de congrés
Accés obert -
Method for forecasting ionospheric electron content fluctuations based on the optical flow algorithm
(2022-01-01)
Article
Accés obertWe present the optical flow algorithm for forecasting the rate of total electron content index (OFROTI). It consists of a method for predicting maps of rapid fluctuations of ionospheric electron content in terms of global ... -
Methodology and consistency of slant and vertical assessments for ionospheric electron content models
(2017-12)
Article
Accés obertA summary of the main concepts on global ionospheric map(s) [hereinafter GIM(s)] of vertical total electron content (VTEC), with special emphasis on their assessment, is presented in this paper. It is based on the experience ... -
Methods and other considerations to correct higher order ionospheric delay terms in GNSS
(2008-06-02)
Presentació
Accés obert -
Midlatitude postsunset plasma bubbles observed over Europe during intense storms in April 2000 and 2001
(2017-09)
Article
Accés obertPlasma bubbles are prevalent features of the equatorial/low-latitude ionosphere which are seldom observed at middle and high latitudes. Understanding the influence of geomagnetic storms on plasma bubbles' migration to ... -
Modelling and assessing ionospheric higher order terms for GNSS signals
(2015)
Text en actes de congrés
Accés obertHigh precision positioning and time transfer are required by a large number of scientific applications: seismic ground deformations, sea level monitoring or land survey applications require sub-centimeter precision in ... -
Models for atmospheric propagation delays
(International Earth Rotation and Reference Systems Service Central Bureau, 2012-08-10)
Capítol de llibre
Accés obertTechniques operated for the realization of the IERS reference systems make use of electromagnetic signals received on the surface of the Earth. During their transit of the atmosphere, the signals experience delays which ... -
MONITOR - Ionospheric Monitoring System: An Analysis of Perturbed Days Affecting SBAS Performance
(2015)
Text en actes de congrés
Accés restringit per política de l'editorialThe Monitor project has been designed to monitor ionospheric events that would allow evaluating its impact on European GNSS Systems. It includes a network of ionospheric scintillation monitoring stations in various locations ... -
MONITOR CCN: TN2230-40-50 update (Appendix L CAPF ICD)
(2014-01-15)
Report de recerca
Accés restringit per acord de confidencialitat -
MONITOR Ionospheric Monitoring System: GNSS performance estimation
(2015)
Text en actes de congrés
Accés obertMONITOR is a project from the European Space Agency’s GNSS Evolutions Programme started in 2010, dedicated to the collection of data and products during active periods of solar activity for later understanding of the impact ... -
MONITOR Ionospheric Network: two case studies on scintillation and electron content variability
(2017-03-13)
Article
Accés obertThe ESA MONITOR network is composed of high-frequency-sampling global navigation satellite systems (GNSS) receivers deployed mainly at low and high latitudes to study ionosphere variability and jointly with global GNSS ... -
Monitoring, tracking and forecasting ionospheric perturbations using GNSS techniques
(2012-12-01)
Article
Accés obertThe 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 ... -
Multi-TID detection and characterization in a dense Global Navigation Satellite System receiver network
(2017-09-01)
Article
Accés obertThe medium-scale traveling ionospheric disturbances (MSTIDs) constitute the most frequent ionospheric wave signatures. We propose a method for detecting the number of simultaneous MSTIDs from a time series of high-pass-filtered ... -
Navegando con satélites : (o cómo posicionarse con GPS y Galileo con errores de pocos centímetros, en tiempo-real y a escala continental)
(Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 2003)
Article
Accés obert -
Network-based High Accuracy Positioning with the GPSTk
(European Space Agency (ESA), 2010)
Text en actes de congrés
Accés obertThis paper presents an implementation of a postprocess kinematic positioning technique similar to PPP (Precise Point Positioning) but based on a network of stations. This technique is independent of precise clock ... -
North-south components of the annual asymmetry in the ionosphere
(2014-07-01)
Article
Accés obertA retrospective study of the asymmetry in the ionosphere during the solstices is made using the different geospace parameters in the North and South magnetic hemispheres. Data of total electron content (TEC) and global ... -
Occurrence of solar flares viewed with GPS: statistics and fractal nature
(2014-11-01)
Article
Accés restringit per política de l'editorialIn this paper we describe the statistical properties of the EUV solar flux sudden variation. The solar flux variation is modeled as a time series characterized by the subsolar Vertical Total Electron Content double difference ...
