Results 121 to 130 of about 77,336 (163)
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An ionospheric E-region nighttime model
Journal of Atmospheric and Terrestrial Physics, 1971Abstract A series of five rocket flights was launched from Wallops Island during a 6-hr period on the morning of 22 February 1968. Electron density profiles were measured with a Langmuir probe during ascent and glowing vapor was released for wind measurements during descent.
W.M Chen, R.D Harris
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Middle-Latitudinal Band Structure Observed in the Nighttime Ionosphere
Journal of Geophysical Research: Space Physics, 2019AbstractIn this study, the Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) electron densities (Ne) from 200 to 800 km during 2006–2017 are used to investigate the middle‐latitudinal band structure of the nighttime ionosphere. The main results are as follows.
Jiahao Zhong, Dou Xiankang, Jiuhou Lei
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Far ultraviolet nighttime ionospheric photometer
Astrophysics and Space Science, 2014Far Ultraviolet Nighttime Ionopsheric Photometer (FNIP) is a newly-designed instrument for low earth orbit missions, observing the earth night airglow nadir at OI 135.6 nm emission produced by ionospheric O++e recombination and receiving the horizontal information on nighttime ionosphere with a spatial resolution of about 1.6∘×3.8∘. This simple, highly
Liping Fu +8 more
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Dynamical behaviour of the nighttime ionosphere at Arecibo
Journal of Atmospheric and Terrestrial Physics, 1971Abstract A survey of 130 nights of incoherent scatter data collected at Arecibo between October 1965 and June 1969 has revealed the presence of two persistent dynamical features in the night-time ionosphere. The first general characteristic is a downward motion of the F -layer which commences near midnight on 85 per cent of the nights and results in
G.J. Nelson, L.L. Cogger
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Initial nighttime ionospheric observations with advanced ionospheric probe onboard FORMOSAT-5
Advances in Space Research, 2020Abstract FORMOSAT-5 satellite was launched into a sun-synchronous orbit at 720 km altitude with 98.28° inclination on 25 August 2017. The onboard scientific payload, Advanced Ionospheric Probe (AIP) is capable of measuring topside ionospheric ion density, cross-track flow velocities, ion composition and temperature, and electron temperature.
C.-K. Chao, S.-Y. Su, C.H. Liu
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The distribution of electrons in the nighttime ionosphere
Journal of Geophysical Research, 1962The mean nighttime electron density all over the world at a series of heights below the peak of the F2 layer in the quiet ionosphere has been deduced from an analysis of ionosonde data. The results are considerably more accurate than any that have hitherto been available, since a method of analysis has been used in which the low-lying ionization ...
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Nighttime changes of the ionosphere during geomagnetic storms
Journal of Atmospheric and Terrestrial Physics, 1972Abstract Electron density profiles below the maximum of the ionosphere have been computed for quiet and disturbed conditions during three geomagnetic storms. The profiles were computed for several stations of different latitude along the 75°W meridian and were compared at specific nighttime hours when significant changes in height make necessary the ...
A.H Katz, M.D Papagiannis
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Nighttime response of the topside ionosphere to magnetic storms
Journal of Geophysical Research, 1970Study of the topside ionosphere during magnetic storms by using simultaneous measurements of electron density and electron temperature has revealed that the behavior of the topside ionosphere is entirely different from that of either the bottomside ionosphere or the magnetosphere.
D. R. Lakshmi, B. M. Reddy
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Nighttime changes in the electron content of the ionosphere
Journal of Geophysical Research, 1968The total electron content of the ionosphere was determined at Auckland (37°S) and at Invercargill (46°S) throughout each night from June 1965 to December 1966. Increases in total content were observed on nearly half the nights in winter but not in summer. Comparison with northern hemisphere results shows that this is a true seasonal change.
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Signal statistics of equatorial nighttime ionospheric scintillations
Radio Science, 1980Cumulative probability distribution functions of equatorial nighttime ionospheric scintillations are studied and are found to agree well with the Nakagami m distribution. Relationship between percentage occurrence of scintillations and S4 index has been established on a monthly mean basis, facilitating the conversion of the scintillation data in analog
C. Raghava Reddi +2 more
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