Results 261 to 270 of about 479,943 (308)

Total electron content measurements in ionospheric physics

Advances in Space Research, 2008
With the advent of modern global networks of dual-frequency Global Positioning System (GPS), total electron content (TEC) measurements along slant paths connecting GPS receivers and satellites at 22,000 km have become the largest data set available to ionospheric scientists.
Thomas L Gaussiran
exaly   +2 more sources

Total electron content of the equatorial ionosphere

Planetary and Space Science, 1973
Total electron content (Nt) variations in the ionosphere above the magnetic equator (Thumba dip 0.6°S) obtained by the Faraday rotation measurements of beacon signals from S66 satellites are described for the period December 1965–August 1968. The Nt value reaches a minimum around 05 hr and a broad maximum between 14–18 hr, the diurnal ratio being more ...
R.G. Rastogi, R.P. Sharma, V. Shodhan
openaire   +1 more source

Pulsations in total columnar electron content

Journal of Geophysical Research: Space Physics, 1981
Radio signals from the ATS 6 beacon received at Boulder reveal small‐amplitude, quasi‐sinusoidal fluctuations with periods in the range of 10 to 50 s. Visual comparison of these data (116 events for October 1974 to April 1975) shows a good correspondence with simultaneous geomagnetic pulsations at Boulder in two thirds of the cases for which Boulder ...
T. Okuzawa, K. Davies
openaire   +1 more source

Comparing Models of Total Electron Content in the Ionosphere for GLONASS

Giroskopiya i Navigatsiya, 2017
Comparative analysis of quality has been performed for the models of total electron content which could be applied in single-frequency navigation receivers of GPS/GLONASS. The analysis is based on the evaluation of total electron content modeling errors versus its experimentally measured values represented by global ionosphere maps (GIM).
V. B. Ivanov, D. A. Zatolokin, O. A. Gorbachev   +2 more
openaire   +1 more source

Towards Reliable Ionospheric Total Electron Content Nowcasting

2018 12th International Conference on Sensing Technology (ICST), 2018
Robust functioning of the global navigation satellite systems (GNSS) heavily depends upon nonlinear dynamics of ionospheric parameters. Nowcasting the dynamics of ionospheric parameters is challenging problem. Informative parameters selection for the accurate predictive models construction is considered as part of the novel approach based on the ...
Aleksei V. Zhukov, Denis N. Sidorov, Yury Yasyukevich, Anna Mylnikova   +3 more
openaire   +1 more source

Latitudinal effect on Total Electron Content variations

2014 International Symposium on Antennas and Propagation Conference Proceedings, 2014
This work focuses on the latitudinal effect on the ionospheric parameters, in particular the Total Electron Content (TEC). Data of two IGS stations at Libreville, Gabon (9.6721°E, 0.3539°N), and at Ny-Alesund, Norway (11.8653°E, 78.9296°N) during February 2008 and July 2008 were analysed.
openaire   +1 more source

TEC (Total Electron Content) Models

1989
Abstract : Models of the ionosphere were developed and utilized to evaluate Total Electron Content for various specified transmission paths from the ground into space. Keywords: Ionosphere; Total electron content.
null Peter, Dickson Kevin P., Larson Andrew J., Jr. Mazzella   +3 more
openaire   +1 more source

Total Electron Content Modelling and Mapping

2013
Although the main purpose of the Global Positioning System (GPS) was to provide accurate positional location at any point on or above the Earth’s surface at all times, for defence and civilian purposes, GPS also had a major impact on ionospheric science during the last decade of the twentieth century.
Bruno Zolesi, Ljiljana R. Cander
openaire   +1 more source

Forecasting of the Total Electron Content at a Single Location

Cosmic Research, 2003
The autocovariance prediction method previously used for the forecast of VI derived ionospheric characteristics has been used for forecast of one of the most important ionospheric—the total electron content (TEC)—at single locations. Quiet and disturbed conditions at different European stations were studied in regard to clarify the forecasting ...
I. Stanisławska, Z. Zbyszynski
openaire   +1 more source