Results 21 to 30 of about 1,145,330 (292)

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, Juan Zornoza, José Miguel, Sanz Subirana, Jaume, Shao, Yixie   +3 more
core   +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, Arikan, Few, Erol, Cemil B., Arikan, Orhan   +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, A. Hofmeister, A. Rocholl, A. W. P. Poon, B. K. Fujikawa, C. A. Currat, F. Boehm, F. M. Richter, F. Mantovani, G. Eder, G. Marx, G. Schubert, H. N. Pollack, J. M. Herndon, J. Wang, J. Zschau, K. Eguchi, K. T. Lesko, K. Tolich, M. Apollonio, M. J. Jackson, M. P. Decowski, N. Tolich, R. Davis, R. Henning, R. L. Rudnick, S. R. Taylor, T. Araki, T. Spohn, W. F. McDonough, Y. -D. Chan   +30 more
core   +4 more sources

Global long-term trends in the total electron content [PDF]

Annales Geophysicae
Total electron content (TEC) is an important parameter for ionospheric dynamics, global navigation satellite system/Global Positioning System (GNSS/GPS) signal propagation and related applications of GNSS/GPS signals.
J. Urbář, J. Laštovička
doaj   +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, Yury Yasyukevich, Artem Vesnin   +2 more
doaj   +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, E Toapanta Guamanarca, H Barbier   +2 more
openaire   +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, H S Gurm, M R Deshpande, R G Rastogi, G Sethia, A R Jain, A V Janve, R K Rai, V M Patwari, B S Subbarao   +9 more
openaire   +2 more sources

Geometric total electron content models for topside ionospheric sounding [PDF]

, 2014
The ionosphere is commonly divided into the portion below (bottomside) and above (topside) the region at which peak values of electron density occur. Topside ionospheric modeling is a challenging problem because of the limited data available. Indeed, the
Tancredi, Urbano
core   +1 more source

Gravity waves propagation in the thermosphere observed from electron density profile and total electron content measurements

Annals of Geophysics, 1997
Ionospheric observations with five minute intervals between ionograms were made during a campaign from 19th to 23rd June 1996 at the Rome station (41.8N, 12.5E).
C. Scotto, M. Pezzopane, L. Ciraolo, C. Bianchi, M. Anzidei   +4 more
doaj   +1 more source

Total Electron Content PCA-NN Prediction Model for South-European Middle Latitudes

Atmosphere, 2023
A regression-based model was previously developed to forecast total electron content (TEC) at middle latitudes. We present a more sophisticated model using neural networks (NN) instead of linear regression.
Anna Morozova, Teresa Barata, Tatiana Barlyaeva, Ricardo Gafeira   +3 more
doaj   +1 more source