Results 271 to 280 of about 139,585 (296)

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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Sporadic E layer formation time

Radiophysics and Quantum Electronics, 1968
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Thunderstorms and Sporadic E-layer Ionization

Nature, 1957
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Connexin-26 mutations in sporadic and inherited sensorineural deafness

Lancet, The, 1998
Xavier Estivill, Paolo Fortina, Raquel Rabionet   +2 more
exaly  

Molecular analysis of APC mutations in familial adenomatous polyposis and sporadic colon carcinomas

Lancet, The, 1992
W F Bodmer
exaly  

Hallmarks of 'BRCAness' in sporadic cancers

Nature Reviews Cancer, 2004
Nicholas Turner, Andrew N J Tutt, Alan Ashworth   +2 more
exaly