Exploració per tema "Ionosfera"
Ara es mostren els items 1-20 de 97
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A method for real-time identification and tracking of traveling ionospheric disturbances using ionosonde data: first results
(2020-01-20)
Article
Accés obertTraveling Ionospheric Disturbances (TIDs) are wave-like propagating irregularities that alter the electron density environment and play an important role spreading radio signals propagating through the ionosphere. A method ... -
A review of higher order ionospheric refraction effects on dual frequency GPS
(2010-11-26)
Article
Accés restringit per política de l'editorialAbstract Higher order ionospheric effects are increasingly relevant as precision requirements on GPS data and products increase. The refractive index of the ionosphere is affected by its electron content and the magnetic ... -
AATR an ionospheric activity indicator specifically based on GNSS measurements
(2018-03-01)
Article
Accés obertThis 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
Accés restringit per acord de confidencialitat© 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 ... -
ADDTID: An alternative tool for studying earthquake/tsunami signatures in the ionosphere. Case of the 2011 Tohoku earthquake
(Multidisciplinary Digital Publishing Institute (MDPI), 2019-09-13)
Article
Accés obertTraveling Ionospheric Disturbances (ADDTID) algorithm. This algorithm automatically detects and characterizes Traveling Ionospheric Disturbances (TIDs) from Global Navigation Satellite System (GNSS) measurements. Applying ... -
An analysis of the correlation between the fast variations in the total electron content of the ionosphere and the carrier phase fluctuations of radio signals from global navigation satellite systems
(Universitat Politècnica de Catalunya, 2021-06-22)
Projecte Final de Màster Oficial
Accés obertonospheric scintillation consists on rapid fluctuations in the amplitude and phase of electromagnetic signals, which includes those of the Global Navigation Satellite System (GNSS), that can lead to cycle slips and even ... -
An overview of methodologies for real-time detection, characterisation and tracking of traveling ionospheric disturbances developed in the TechTIDE project
(2020-08-04)
Article
Accés obertThe 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 ... -
Analysis of ionospheric disruptions in GNSS signals from Tonga eruption
(Universitat Politècnica de Catalunya, 2022-07-13)
Projecte Final de Màster Oficial
Accés obertThe Tonga volcano eruption at 04:15 UT on 2022-01-15 released enormous amounts of energy into the atmosphere, causing very significant geophysical variations not only in the immediate proximity of the epicenter but also ... -
Answer to the comments on “Confirming geomagnetic Sfe by means of a solar flare detector based on GNSS”
(2020-04-20)
Article
Accés obertHernández-Pajares and García-Rigo have written a document criticizing our paper “Confirming geomagnetic Sfe by means of a solar flare detector based on GNSS. J Space Weather Space Clim 9: A42. https://doi.org/10.1051/swsc/2019040” ... -
Applying the geodetic detrending technique for investigating the consistency of GPS L2P(Y) in several receivers
(2022-11)
Article
Accés obertGlobal Navigation Satellite System signals have been used for years to study high-frequency fluctuations (f>0.1Hz)intheionosphere. The customary procedure uses the geometry-free (GF) combination ofL1andL2carriers, for which ... -
Assessing the quality of ionospheric models through GNSS positioning error: methodology and results
(2020-01-01)
Article
Accés obertSingle-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 ... -
Assessment of GRAS ionospheric measurements for ionospheric model assimilation
(Multidisciplinary Digital Publishing Institute (MDPI), 2023-06-15)
Article
Accés obertWe conducted a study to assess the GNSS (Global Navigation Satellite System) Receiver for Atmospheric Sounding (GRAS) ionospheric data quality by processing Radio Occultation (RO) observations of ionospheric products. The ... -
Assessment of Ionospheric Corrections Algorithms Using the GNSS Laboratory Tool Suite (gLAB): From STEC to Navigation Performance
(ION Publications (The Institute of navigation), 2020)
Text en actes de congrés
Accés restringit per política de l'editorialUsers of the Global Navigation Satellite System (GNSS) using a single-frequency receiver need to use an Ionospheric Correction Algorithm (ICA) to compensate the delay introduced by the Ionosphere on radio waves. The European ... -
Assessment of the F2-layer electron density peak inferred from Formosat-3/COSMIC radio occultations over half a Solar Cycle
(2016)
Text en actes de congrés
Accés restringit per política de l'editorialGNSS radio occultation (RO) measurements have become crucial to provide valuable information on the vertical electron density structure of the Ionosphere. Ionospheric key parameters such as the maximum electron density ... -
Characterization and modelling of the ionosphere for EGNOS development and qualification
(2013)
Comunicació de congrés
Accés restringit per política de l'editorialThe 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)
Text en actes de congrés
Accés restringit per política de l'editorialSignals 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 ... -
Comparing performances of seven different global VTEC ionospheric models in the IGS context
(International GNSS Service (IGS), 2016)
Text en actes de congrés
Accés restringit per política de l'editorialA summary of the main concepts on Global Ionospheric Map(s) (hereinafter GIM(s)) of Vertical Electron Content (VTEC), with special emphasis on their assessment, is presented in this paper. It is based on the experience ... -
Comprehensive ionospheric delay modelling for single-frequency GNSS precise positioning: first steps
(International GNSS Service (IGS), 2016)
Comunicació de congrés
Accés restringit per política de l'editorial -
Confirming geomagnetic Sfe by means of a solar flare detector based on GNSS
(2019-11-28)
Article
Accés obertSolar Flares (SF) refer to sudden increases of electromagnetic radiation from the Sun lasting from minutes to hours. Irradiance in the Extremely Ultra-Violet (EUV) or X band is enhanced and it can produce a sudden ... -
Consistency of seven different GNSS global ionospheric mapping techniques during one solar cycle
(2018-06)
Article
Accés obertIn the context of the International GNSS Service (IGS), several IGS Ionosphere Associated Analysis Centers have developed different techniques to provide global ionospheric maps (GIMs) of vertical total electron content ...