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Dynamics, chemistry, and modeling studies in the aviation and aerospace transition zone. [PDF]
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Advances in Space Research, 2004
Abstract Photometers monitoring oxygen night airglow emissions and a Canadian advanced digital ionosonde (CADI) have given a complementary view of the polar ionosphere over Eureka, Canada (80°N, 86°W) through each winter since 1991. The 630 nm [O] emission intensity, in particular, is seen to be directly proportional to the f o F2 critical ...
D.J. McEwen +3 more
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Abstract Photometers monitoring oxygen night airglow emissions and a Canadian advanced digital ionosonde (CADI) have given a complementary view of the polar ionosphere over Eureka, Canada (80°N, 86°W) through each winter since 1991. The 630 nm [O] emission intensity, in particular, is seen to be directly proportional to the f o F2 critical ...
D.J. McEwen +3 more
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Journal of Geophysical Research: Space Physics, 1978
An unusually comprehensive set of ionospheric, particle, optical, and magnetic measurements were made during simultaneous Isis 1 and 2 passes on December 14, 1971, at about 0520 and 0720 UT, when the northern magnetic polar ionosphere was in darkness to almost the maximum possible extent. During the first part of the day, magnetic activity was very low,
J. H. Whitteker +6 more
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An unusually comprehensive set of ionospheric, particle, optical, and magnetic measurements were made during simultaneous Isis 1 and 2 passes on December 14, 1971, at about 0520 and 0720 UT, when the northern magnetic polar ionosphere was in darkness to almost the maximum possible extent. During the first part of the day, magnetic activity was very low,
J. H. Whitteker +6 more
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A snapshot of the polar ionosphere
Planetary and Space Science, 1976This paper presents a picture of the north polar F layer and topside ionosphere obtained primarily from three satellites (Alouette 2, ISIS 1, ISIS 2) that passed over the region within a time interval of about 50 min on a magnetically quiet day. The horizontal distribution of electron densities at the peak of the F layer is found to be similar to ...
J.H. Whitteker +5 more
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The dynamic ionospheric polar hole
Radio Science, 1993At a time when most polar cap ionospheric studies are focused on electron density enhancements caused by patches or arcs, this paper discusses an F region depletion known as the ionospheric polar hole. Statistically, polar holes tend to develop on the nightside from 2100–0600 MLT between 70°–80°Λ.
G. Crowley +5 more
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Irregularity motions in the polar ionosphere
Radio Science, 1973The frequency spectrum of a CW HF radio signal transmitted from an aircraft and propagated over a 1‐hop path inside the polar cap was recorded for about 50 nighttime hr during August 1967. Two different general types of disturbance were observed in these records: (a) a diffuse spectral broadening which was always present to some extent, even under ...
Roy P. Basler +2 more
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Reviews of Geophysics, 1982
During the International Magnetospheric Study period our understanding of phenomena in the polar ionosphere and the role of this region in the coupling between the ionopshere and the magnetosphere has progressed to a point where many self‐consistent pictures are emerging. In many cases the required relationships between electric currents, conductivity,
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During the International Magnetospheric Study period our understanding of phenomena in the polar ionosphere and the role of this region in the coupling between the ionopshere and the magnetosphere has progressed to a point where many self‐consistent pictures are emerging. In many cases the required relationships between electric currents, conductivity,
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Phase scintillations at the polar ionosphere
2013 IEEE International Conference on Space Science and Communication (IconSpace), 2013A dual-frequency GPS Ionospheric Scintillation and TEC Monitor (GISTM) receiver, GSV4004B, has been installed at Alert, Canada (82.48° N, 297.75° E, corresponding to 86.95° N, 155.77° E geomagnetic coordinate) since May 2008 to study the ionospheric variability at a high-latitude location.
M.J. Homam +2 more
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ARCTIC, 1969
Defines the ionsphere and describes its three horizontal layers or regions, distinguished by physical characteristics and ionization processes: as quiet D, E and F regions and as disturbed D, E and F regions when there is a disturbed sun (sunspot magma).
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Defines the ionsphere and describes its three horizontal layers or regions, distinguished by physical characteristics and ionization processes: as quiet D, E and F regions and as disturbed D, E and F regions when there is a disturbed sun (sunspot magma).
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The Lorentz “polarization”‐correction in the ionosphere
Terrestrial Magnetism and Atmospheric Electricity, 1939The authors discuss criticisms by Appleton, Farmer, and Ratcliffe, and by Booker and Berkner of their former conclusion that the Lorentz polarization‐term is zero in the ionosphere. They advance further experimental facts in support of their viewpoint, and criticize the views of AFR in detail.
D. F. Martyn, G. H. Munro
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