Results 1 to 10 of about 36,192 (283)

Statistical analysis of ionospheric total electron content (TEC): long-term estimation of extreme TEC in Japan [PDF]

open access: yesEarth, Planets and Space, 2021
Ionospheric total electron content (TEC) is one of the key parameters for users of radio-based systems, such as the Global Navigation Satellite System, high-frequency communication systems, and space-based remote sensing systems, since total ionospheric ...
Michi Nishioka   +5 more
doaj   +2 more sources

Performance of IRI 2016 model in predicting total electron content (TEC) compared with GPS-TEC over East Africa during 2019–2021 [PDF]

open access: yesScientific Reports
This study evaluated the applicability of IRI-2016 model in predicting GPS TEC using the monthly means of the five (5) quiet days for equinoxes and solstices months.
Emmanuel D. Sulungu
doaj   +2 more sources

Isolated ionospheric disturbances as deduced from global GPS network [PDF]

open access: yesAnnales Geophysicae, 2004
We investigate an unusual class of medium-scale traveling ionospheric disturbances of the nonwave type, isolated ionospheric disturbances (IIDs) that manifest themselves in total electron content (TEC) variations in the form of single aperiodic ...
E. L. Afraimovich   +2 more
doaj   +6 more sources

Prediction of Global Ionospheric Total Electron Content (TEC) Based on SAM‐ConvLSTM Model

open access: yesSpace Weather, 2023
This paper first applies a prediction model based on self‐attention memory ConvLSTM (SAM‐ConvLSTM) to predict the global ionospheric total electron content (TEC) maps with up to 1 day of lead time.
Hanze Luo   +7 more
doaj   +2 more sources

Ionospheric Total Electron Content (TEC) Anomalies Associated with Earthquakes through Karhunen-Loeve Transform (KLT)

open access: yesTerrestrial, Atmospheric and Oceanic Sciences, 2010
This research uses eigenvalue characteristics of the Karhunen-Loéve Transform of ionosphereic total electron content (TEC) to investigate precursors for 12 earth quakes of Richter magnitude scale M ³ 5.0 in a local region of latitude 23.00 to 24.00°N and
Jyh-Woei Lin
doaj   +3 more sources

Ionospheric total electron content (TEC) above Ecuador

open access: yesJournal of Physics: Conference Series, 2022
Abstract The equatorial ionosphere over the Ecuadorian territory has not been previously studied, although there are some studies in other equatorial geographical positions, local research is required to characterize the ionospheric magnetoactive plasma in this region.
E D Lopez Izurieta   +2 more
openaire   +1 more source

Double-thin-shell approach to deriving total electron content from GNSS signals and implications for ionospheric dynamics near the magnetic equator

open access: yesEarth, Planets and Space, 2021
A new technique was developed to estimate the ionospheric total electron content (TEC) from Global Navigation Satellite System (GNSS) satellite signals. The vertically distributed electron density was parameterized by two thin-shell layers (double-shell ...
Takashi Maruyama   +5 more
doaj   +1 more source

Forecasting Regional Ionospheric TEC Maps over China Using BiConvGRU Deep Learning

open access: yesRemote Sensing, 2023
In this paper, we forecasted the ionospheric total electron content (TEC) over the region of China using the bidirectional convolutional gated recurrent unit (BiConvGRU) model.
Jun Tang   +3 more
doaj   +1 more source

ScintPi 2.0 and 3.0: low-cost GNSS-based monitors of ionospheric scintillation and total electron content

open access: yesEarth, Planets and Space, 2022
We have devoted efforts to the development and performance evaluation of new low-cost ionospheric instruments for studies that require distributed observations and for educational and citizen science initiatives.
Josemaria Gomez Socola   +1 more
doaj   +1 more source

Investigation of Ionospheric Earthquake Precursors Using US-TEC Data during the Solar Maximum of 2013–2015

open access: yesJournal of Astronomy and Space Sciences, 2020
Recent studies have suggested that detectable ionospheric disturbances precede earthquakes. In the present study, variations in the vertical total electron content (TEC) for eight earthquakes with magnitudes of M ≥ 5.5 in the western United States were
Jeongchan Park, Sun Mie Park
doaj   +1 more source

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