Results 161 to 170 of about 373,009 (204)

The sporadicElayer at Kodaikanal

Journal of Geophysical Research, 1954
An examination of the ionospheric records at Kodaikanal, which is located almost on the geomagnetic equator, reveals that the sporadic E layer here has some regular features not observed at other latitudes. It occurs in nearly 93 per cent of the half-hourly records during the daytime.
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Distribution function of the sporadic E-layer screening frequency

Radiophysics and Quantum Electronics, 1991
The distribution function of the sporadic E-layer screening frequency is derived using the techniques of mathematical statistics and the physical theory of sporadic E-layer formation. The function is compared to the empirical distribution functions known from literature. The best correlation of the obtained distribution and experimental data is shown.
A. N. Lukin, S. N. Moiseev
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Lunar tides in the sporadic E-layer at Ibadan

Journal of Atmospheric and Terrestrial Physics, 1959
Abstract An analysis of the lunar semi-diurnal tides in fEs and h ' Es is made for Ibadan. The results are presented in the form of harmonic dials. Comparisons are made between these results and those of other stations.
R.W. Weight, N.J. Skinner
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Wave activity, F1-layer disturbance and a sporadic E-layer over EISCAT

Journal of Atmospheric and Terrestrial Physics, 1989
Abstract During July 1987 the EISCAT radars were used to study thin layers in the ionospheric E -region. This paper outlines the observing campaign, describes the GEN-type radar program used for the UHF experiments, and discusses the ‘descending’ or ‘sequential’ layer observed on the afternoon of 12 July during a period of strong wave activity ...
B.S. Lanchester, H. Rishbeth, T. Nygrén, L. Jalonen, T. Turunen   +4 more
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Sporadic-E and the F2-layer at middle latitudes

Journal of Atmospheric and Terrestrial Physics, 1968
Abstract Data are presented which show that the diurnal variations of f0F2 and fE8 at middle latitudes in summer during sunspot minimum conditions are frequently very similar. Both variations are anomalous in that maxima occur near 08.00 and 20.00 L.M.T. with a minimum near 14.00 L.M.T.
J.W. King, R. Pratt, W.S. Newman
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The reflection characteristics of a patchy sporadic-E layer

Journal of Atmospheric and Terrestrial Physics, 1962
In the temperate zones, it is known that ƒ0Es and ƒbEs are insensitive to gain changes of the ionosonde used to measure them even when ƒbEs is much less than ƒ0Es. Such insensitivity may be accounted for if the sporadic-E layer has a peak electron density which varies rapidly horizontally such that the corresponding critical frequencies within an area ...
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Detection of sporadic E layers over the Eastern Mediterranean

2013 IEEE International Geoscience and Remote Sensing Symposium - IGARSS, 2013
Sporadic E layer is an ionospheric phenomenon which has been classified as an E region (90-150 km) irregularity described by thin layers of extremely dense ionization patches which can significantly affect radio wave propagation. Especially in the case of Cyprus complete blocking of HF signals emanating from short and long-distance HF signals has been ...
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Formation of sporadic E layers at low magnetic latitudes

Planetary and Space Science, 1986
Abstract Rocket observations of the electron density and neutral winds conducted during the morning, evening and night-times show that the sporadic E layers observed over an equatorial station, Thumba, cannot be explained in terms of the currently available version of the wind shear theory. These observations also suggest, strongly, that the modified
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Thunderstorms and sporadic-E layer ionization over Ottawa, Canada

Journal of Atmospheric and Terrestrial Physics, 1962
Abstract Vertical incidence ionospheric sounding records at Ottawa during the passage of isolated thunderstorms in 1959 are studied. During thunderstorms, an increase ƒE s and an increase in the number of multiple radio reflections from the Es are detected.
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Characterizing global equatorial sporadic-E layers through COSMIC GNSS radio occultation measurements

Astrophysics and Space Science
Aramesh Seif, S. Panda
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