Results 151 to 160 of about 373,009 (204)

20 March 2015 solar eclipse influence on sporadic E layer

Advances in Space Research, 2015
Abstract This paper shows how the solar eclipse occurred on 20 March 2015 influenced the sporadic E (Es) layer as recorded by the Advanced Ionospheric Sounder by Istituto Nazionale di Geofisica e Vulcanologia (AIS-INGV) ionosondes installed at Rome (41.8°N, 12.5°E) and Gibilmanna (37.9°N, 14.0°E), Italy. In these locations, the solar eclipse was only
Pezzopane, M, Pietrella, M., PIGNALBERI, ALESSIO, Tozzi, R.   +3 more
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Is there a conclusive evidence on lightning-related effects on sporadic E layers?

Journal of Atmospheric and Solar-Terrestrial Physics, 2018
In recent years, there have been a few studies claiming that thunderstorm cloud-to-ground lightning discharges affect sporadic E layers existing over the storm.
C. Haldoupis
semanticscholar   +1 more source

The formation of the sporadic-E layer

Journal of Atmospheric and Terrestrial Physics, 1964
Abstract It is assumed that sporadic -E is caused by the vertical movement of ionisation to form a layer of enhanced ionisation, the limiting width of such a layer being determined by the effects of diffusion. Thus since the diffusion constant varies markedly with geomagnetic latitude it is predicted that layer formation will be more likely near to ...
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Lunar tidal variations in the equatorial sporadic-E-layer

Journal of Atmospheric and Terrestrial Physics, 1970
Abstract In this paper, noon values of f 0 E s at Kodaikanal are studied to find lunar tidal variations in the equatorial sporadic- E -layer ( E sq type). It is shown that the phases of lunar diurnal and semidiurnal variations in f 0 E s and f b E s are in agreement with those of the H -component of the Earth's magnetic ...
B.K. Joshi, K.M. Kotadia
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A study of the sporadic-E layer over Waltair

Journal of Atmospheric and Terrestrial Physics, 1964
Abstract From the ƒfE s data, manually observed at Waltair, during February 1956 to February 1957 and November 1961 to October 1962, the diurnal and seasonal variation of the occurrence of Es is studied. An attempt is made to explain the obtained results. The diurnal and seasonal variations of ƒE s are studied and the results are
M.Mukunda Rao, B.Ramachandra Rao
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56-Megacycle Reception via Sporadic-E-Layer Reflections

Proceedings of the IRE, 1939
A theory that 56-megacycle transmission at a distance of 400 to 1200 miles takes place via sporadic-E-layer reflections has been investigated by comparing numerous reports of such reception with ionosphere data provided by the National Bureau of Standards. Simultaneous transmission conditions on lower frequencies are also considered.
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Lunar tides in the equatorial sporadic-E layer

Journal of Atmospheric and Terrestrial Physics, 1965
Abstract A determination of the lunar tides in the sporadic E -layer is made, using data for nine years from Ibadan and seven years from Huancayo. The large amount of data makes possible separate analyses for seasonal effects and for the “luni-solar” tides.
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The gradient instability in Gaussian sporadic E-layers

Journal of Atmospheric and Terrestrial Physics, 1973
The stability of ionospheric layers is investigated. A bounded layer, represented mathematically by a Gaussian layer plus background, is adopted as a model ionization density. Such a model is a good representation of the ionospheric situation and allows an unambiguous interpretation of positive growths of the instability.
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The equatorial sporadic-E layer and the electrojet

Journal of Atmospheric and Terrestrial Physics, 1962
Abstract In this paper, an analysis is made of E s data from three chains of ionospheric stations near the magnetic equator in three different longitudes. Some of the stations were set up during the I.G.Y. period. The analysis shows that the electrojet as judged by the diurnal range of H , extends up to ±7° magnetic dip from the magnetic ...
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Magnetic field variations in temperate zone sporadic-E layers

Planetary and Space Science, 1966
Geomagnetic field variations in temperate zone sporadic E layer according to wind-shear ...
W.I. Axford, D.M. Cunnold, L.J. Gleeson
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