Results 21 to 30 of about 1,149,119 (338)
Annals of Geophysics, 2002 Results derived from analysing the ionosphere response to faint and bright solar flares are presented. The analysis used technology of a global detection of ionospheric effects from solar flares as developed by the authors, on the basis of phase ...
L. A. Leonovich +3 more
doaj +1 more source
The Tropical Total Electron Content Enhancement
, 2023 Abstract Continuous and regional measurements of total electron content (TEC) over the Americas have revealed that the most significant TEC values during the June solstice frequently reside over Central America. These TEC enhancements are observed during the June solstice afternoon hours, last for a few hours, are constrained to regions of ...
Cesar Enrique Valladares +1 more
openaire +1 more source
Electron density profile modeling
Annals of Geophysics, 1996 The Base Point Model (BPM) is used to model the electron density (N) profile in the ionosphere, This model assumes two Chapman profile expressions one for the bottomside and one for the topside, and requires a characteristic point called "F region base ...
T. Heredia +2 more
doaj +1 more source
A New Global Total Electron Content Empirical Model
Remote Sensing, 2019 Research on total electron content (TEC) empirical models is one of the important topics in the field of space weather services. Global TEC empirical models based on Global Ionospheric Maps (GIMs) TEC data released by the International GNSS Service (IGS)
Jiandi Feng +3 more
doaj +1 more source
Ionospheric Total Electron Content Estimation Using IONOLAB Method
2007 IEEE 15th Signal Processing and Communications Applications, 2007 Ionosphere which is an important atmospheric layer for HF and satellite communications, can be investigated through Total Electron Content (TEC). Global Positioning System provides cost-effective means for TEC estimation. Regularized TEC estimation method (D-TEI) is developed to estimate high resolution, robust TEC values.
Nayir, Halil +3 more
openaire +3 more sources
A geoneutrino experiment at Homestake [PDF]
, 2006 A significant fraction of the 44TW of heat dissipation from the Earth's interior is believed to originate from the decays of terrestrial uranium and thorium.
A. A. Kremenetsky +30 more
core +4 more sources
Ionosphere/Plasmasphere sounding with ground and space-based GNSS observations [PDF]
, 2016 Applying a methodology developed and tested in previous studies, the contribution from the ionospheric and plasmaspheric regions to the total electron content (measured by ground receivers) is analyzed.
González Casado, Guillermo +3 more
core +1 more source
Ionospheric total electron content (TEC) above Ecuador
Journal 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
Wave Signatures in Total Electron Content Variations: Filtering Problems
Remote Sensing, 2020 Over recent years, global navigation satellite systems (GNSSs) have been increasingly used to study near-Earth space. The basis for such studies is the total electron content (TEC) data.
Boris Maletckii +2 more
doaj +1 more source
Total electron content at low latitudes
Journal of Earth System Science, 1978 Radio beacon from ATS-6 at 140 MHz was used to measure the changes in the polarization angle (Faraday rotation) at Bombay, Rajkot, Ahmedabad, Udaipur and Patiala during October 1975 to July 1976. In this paper, results of diurnal, seasonal and latitudinal variations in total electron content (TEC) derived from these measurements are reported.
Malkiat Singh +9 more
openaire +2 more sources