Results 31 to 40 of about 6,028 (158)
Application of Kalman filter in detecting pre-earthquake ionospheric TEC anomaly
Geodesy and Geodynamics, 2011 : As an attempt, the Kalman filter was used to study the anomalous variations of ionospheric Total Electron Content (TEC) before and after Wenchuan Ms8.0 earthquake, these TEC data were calculated from the GPS data observed by the Crustal Movement ...
Zhu Fuying, Wu Yun, Fu Ningbo
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Precursor analysis of ionospheric GPS-TEC variations before the 2010 M7.2 Baja California earthquake
Geomatics, Natural Hazards & Risk, 2017 Total electron content (TEC) data obtained from receivers of global navigation satellite systems (GNSSs) are increasingly being used to detect pre-earthquake ionospheric anomalies.
Mustafa Ulukavak, Mualla Yalcinkaya
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Harmonic Analysis of Ionospheric Total Electron Content (TEC) Using Kalman Filter
Journal of Physics: Conference Series, 2019 Abstract The ionospheric diurnal variation from TEC Global Ionospheric Maps (GIM) data at the epicenter coordinates of the Lombok earthquake on July 29 2018 (-8.4°, 116.5°) has been analyzed using harmonic function which is the sum of the sine and cosine functions with estimated harmonic coefficients obtained using Kalman Filter (KF ...
Buldan Muslim +2 more
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Total electron content (TEC) forecasting by Cascade Modeling: A possible alternative to the IRI‐2001 [PDF]
Radio Science, 2008 The ionospheric parameter, total electron content (TEC) is one of the key parameters in navigation and telecommunication applications. A small group at METU in Ankara has been developing data driven models in order to forecast the ionospheric parameters since 1990.
Erdem Turker Senalp +2 more
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Geodetski VestnikIn this paper, we presented a comparison of Total Electron Content (TEC) obtained from various sources: ionosondes, the IRI model, the NeQuick model, and Global Navigation Satellite Systems (GNSS).
Stefan Krstić +4 more
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Characterization of GPS total electron content (GPS-TEC) in Antarctica from 2004 to 2011
Annals of Geophysics, 2013 The vertical total electron content (VTEC) obtained from 2004 to 2011 at Comandante Ferraz Brazilian Antarctic Station (62.1°S, 58.4°W) is analyzed to study the mean diurnal, seasonal and annual variations.
Emília Correia +2 more
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A Regional Model of Topside Ionospheric Effective Scale Heights Derived From Ionosonde and GNSS TEC
Space Weather, 2023 Ionospheric scale height is critical for the structure of electron density profile in the ionosphere. However, mostly, the effective scale heights (fitted with mathematical functions) instead of topside ionospheric scale heights were used to reconstruct ...
Chunhua Jiang +6 more
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Variation of Total Electron Content [TEC] and Their Effect on GNSS over Akure, Nigeria
Applied Physics Research, 2012 The effect of Space weather is usually linked to disturbances in the ionosphere (gradients in the Total electron content (TEC)). This has significant effect especially for GPS users causing degradation in range measurements, loss of lock by the receiver of the GPS signal. Knowledge of these TEC gradients is important to various GPS users.
Rufus Sola Fayose +3 more
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Can we detect X/M/C-class solar flares from global navigation satellite system data?
Results in Physics, 2019 Based on the total electron content (TEC) data from global navigation satellite system (GNSS), we analyzed 224 classified solar flares (SFs) occurred in 2014–2017. We suggest an algorithm for SF automatic detection.
Semen V. Syrovatskiy +5 more
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GPS total electron content (TEC) for ionospheric observation
GPS total electron content (TEC) for ionospheric observation[ABSTRACT]Total electron content (TEC) investigation is one of the powerful tools in ionsopheric study. Several case studies and statistical studies on storms, tsunami, earthquakes, and so on have been performed. To understand the mechanism, monitoring of three-dimensional distributions of ionospheric electron density is effective.
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