Results 191 to 200 of about 475 (211)

On the planetary ionospheric vortex electric fields

Advances in Space Research, 2008
Abstract The paper presents a physical mechanism of large-scale vortex electric field generation in the ionospheric E- and F-layers. It shows that the planetary-scale, synoptic short-period (from several second to several hours) and fast processes (with propagation velocity higher than 1 km/s) produce a planetary-scale internal vortex electric field.
G.D. Aburjania, L.S. Alperovich, A.G. Khantadze, O.A. Kharshiladze   +3 more
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Traveling planetary scale waves in the ionosphere

Journal of Atmospheric and Terrestrial Physics, 1975
Abstract From an analysis of long distance received daytime VLF phase data over three transmission paths spanning a total of 160° of longitude, and from lower stratospheric radiance data from the SIRS instrument on the Nimbus IV weather satellite, traveling planetary scale waves are shown to exist at about 70 km for the 1970/1971 winter.
D.J Cavalier, R.J Deland
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Ionospheric Irregularities Initiated by Planetary Waves

Cosmic Research, 2001
The nonstationary process of the accumulation of ions of meteoric origin, which is caused by propagation of planetary waves at altitudes of the lower ionosphere, is considered. Based on horizontal and vertical ion drift in planetary waves, a possibility of plasma density increases by a factor of 10–20 in comparison with the background concentration is ...
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Thermal Structure of Planetary Ionospheres

1973
Electrons released in the photoionization process due to the absorption of solar XUV radiation in planetary atmospheres may have initially kinetic energies of one to 100 eV. The energy E of photoelectrons resulting from photons of energy h v interacting with an atmospheric constituent whose ionization potential is IP is given by $$E = hv - IP ...
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Planetary wave effect on ionospheric absorption

Journal of Atmospheric and Solar-Terrestrial Physics, 1998
Abstract A relationship is examined between quasi-periodic fluctuations in absorption data at ionospheric altitudes and wave perturbations in wind data at tropospheric, stratospheric and lower mesospheric heights at Indian latitudes. The spectral analyses using Maximum Entropy Method (MEM) reveal almost the same band of periodicities in both the ...
Saji Abraham, S.K. Dhaka, K.D. Praveen, N. Nath, O.P. Nagpal, K.L. Baluja   +5 more
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Observed Properties of Planetary Ionospheres

1973
Information on the ionosphere of Earth has accumulated for the past four decades. Originally, electron density was the only primary quantity observable by groundbased radio techniques. During the last two decades information on other physical parameters of the ionosphere, such as charged particle temperature (T e , T i and ion composition (m i ), as ...
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Beaming of electromagnetic radiation by planetary ionospheres

Icarus, 1970
Abstract Use is made of elementary analytical and experimental results to predict an increased directivity from sources radiating inside or outside plasma layers. It is found that the directivity enhancement is higher when the source is between two plasma layers.
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Physics of Planetary Ionospheres

Physics Today, 1975
S. J. Bauer, A. Dalgarno
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Planetary Ionospheres and Ionospheric Instabilities

International Astronomy and Astrophysics Research Journal
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IONOSPHERE PROBED FOR PLANETARY COMMUNICATIONS

School Science and Mathematics, 1962
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