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The variation of foF2 in the equatorial ionosphere
2004 Asia-Pacific Radio Science Conference, 2004. Proceedings., 2005The ionospheric variation plays an important role in high frequency (HF) propagation. HF radio waves emitted by a transmitter at a given elevation angle may travel and reach the designated receiver via reflection off the ionosphere in a given circuit.
null Zhang Rui Xue, null Teo Kien Boon
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The Equatorial Ionospheric Anomaly and the Equatorial Electrojet
Radio Science, 1969It is shown that for the American zone the F‐region equatorial anomaly and the equatorial electrojet are highly correlated, whereas the anomaly and the Sq current system correlate poorly. A suggested explanation for the correlation is that the eastward electric field which drives the electrojet is also present in the F‐region and there causes upward ...
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Variability of foF2 in the equatorial ionosphere
Advances in Space Research, 2004Abstract We have used data from two equatorial stations in the African longitude sector to study the monthly variability of foF2. Diurnal, seasonal, and solar activity effects were investigated. The data established by this study are proposed as equatorial input values for the development of a variability model for the International Reference ...
D. Bilitza +3 more
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Equatorial ionospheric drift and the electrojet
Planetary and Space Science, 1971The results of the horizontal drift measurements at Thumba (0.6°S dip), a station situated at the magnetic equator, are studied in relation to the equatorial electrojet currents estimated from the variations of H component of the geomagnetic field. The daily, seasonal, and latitudinal variations of drift show a close similarity between the drift and ...
H. Chandra, R.K. Misra, R.G. Rastogi
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Space Weather in the Equatorial Ionosphere
Space Science Reviews, 2003The’ scintillations’ observed on signals received in the equatorial region from GPS satellites are due to plasma instabilities in the F region of the ionosphere, also detected as spread F These instabilities give rise to depletions of ionisation or ‘bubbles’.
R J Stening
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Ionisation ledges in the equatorial ionosphere
Nature, 1974A cusp formation on topside ionograms recorded at equatorial latitudes by means of the satellite Alouette I, has been discussed by earlier workers1, 2. The cusps are associated with an ionisation ledge lying along the magnetic field line passing through the peaks of the equatorial anomaly.
R. RAGHAVARAO, M. R. SIVARAMAN
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Electric fields in the equatorial ionosphere
Journal of Atmospheric and Terrestrial Physics, 1977Abstract During a Commonwealth Collaborative Campaign between India and the U.K., artificial ion and neutral clouds were released at altitudes between 150 km and 160 km, using Petrel rockets launched from the TERLS range, Thumba, India. The experiments were conducted at local dusk, and the magnitude of the electric field components and neutral wind ...
B.G. Anandarao +5 more
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Temperature and composition of the equatorial ionosphere
Journal of Geophysical Research, 1967Equatorial ionosphere charged particle composition and ion and electron temperatures using incoherent scattering autocorrelation ...
D. T. Farley +3 more
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Electromagnetic resonances in the equatorial ionosphere
Space Science Reviews, 1982The diagnostic and communication possibilities, based on resonant properties of ionospheric magnetoplasma near the Equator, are discussed for a wide spectral range of electromagnetic waves. The utilization of geometrical resonances of both natural and artificial origin and plasma eigenmodes are considered for a model of anisotropic heterogeneous ...
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Study of the Equatorial Ionosphere.
1976Abstract : Data from five years' daily records of the amplitude and Faraday rotation angle of the 136.47 MHz beacon on ATS-3 are analyzed to give the dependence of scintillation on sunspot number. The seasonal variation is then found. Finally, correlation among scintillation index (SI), total electron content (TEC) and magnetic activity (KP) is ...
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