Exploració per tema "Ionosphere"
Ara es mostren els items 1-20 de 121
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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 new method for ionospheric tomography and its assessment by ionosonde electron density, GPS TEC, and single-frequency PPP
(Institute of Electrical and Electronics Engineers (IEEE), 2019-01-05)
Article
Accés obertA new tomographic method was developed with the main goal of mapping the ionosphere in the region of Brazil. The ionospheric background was estimated based on ionosonde and radio-occultation measurements to overcome the ... -
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 ... -
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 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 St. Patrick's Day 2015 Geomagnetic storm impact on EGNOS
(European Space Agency (ESA), 2015)
Comunicació 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 ... -
Assessment of the capabilities and applicability of ionospheric perturbation indices provided in Europe
(2020-08-01)
Article
Accés obertPerturbations in the ionosphere are of great interest not only for scientific research, but also for applications using transionospheric radiosignals (e.g. GNSS applications and HF communication), because the transmission ... -
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 ... -
Biomass End-to-End PErformance Simulator: Description of the ionosphere module
(Institute of Electrical and Electronics Engineers (IEEE), 2021)
Text en actes de congrés
Accés obertESA's BIOMASS Earth Explorer mission aims at providing global above ground forest biomass. Its payload is a UHF synthetic aperture radar. At UHF ionospheric effects, notably the group delay and phase advance, the Faraday ... -
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 ... -
Combining Swarm Langmuir probe observations, LEO-POD-based and ground-based GNSS receivers and ionosondes for prompt detection of ionospheric earthquake and tsunami signatures: Case study of 2015 Chile-Illapel event
(2021-12-08)
Article
Accés obertThe study investigates ionospheric electric field responses to the earthquake (EQ) of magnitude 8.3, and the related seismic activity and tsunami triggered by the mainshock in Chile-Illapel region, at 22:54 UTC, in the ... -
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 ...