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Periodic disturbances in the ionosphere
Journal of Geophysical Research, 1968Total electron content measurements, at latitudes of 34°S and 42°S, showed that 30–50% of all large-scale irregularities in the ionosphere are periodic in space and in time. The observed wavelengths were generally between 40 and 160 km. The periods ranged from about 60 minutes down to a sharply defined lower limit of 15 minutes.
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Ionospheric disturbances and gravity waves
Journal of Geophysical Research, 1976The response of ionization to a gravity wave moving through the ionosphere is studied. Hydrodynamic equations are used, and local thermodynamic equilibrium is imposed for simplicity. The treatment involves a perturbation analysis, and the background medium is assumed to be time stationary, horizontally stratified, and known. It is shown that ionization
H. Eun, S. H. Gross
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Ionospheric disturbances detected by MEXART
Advances in Space Research, 2012Abstract The radio telescope MEXART was developed to make observations of interplanetary scintillation (IPS) produced by large scale disturbances associated with solar events. In this work it is shown that on occasion there are disturbances in the ionosphere that are related with these events and which cannot only contaminate the IPS but actually be ...
A. Carrillo-Vargas +5 more
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Ionospheric disturbance forecasting
Journal of the British Institution of Radio Engineers, 1953The paper reviews the methods adopted to forecast the ionospheric disturbances that occasionally interrupt short-wave communication circuits. The normal characteristics of the ionosphere and their regular variations are briefly described. The causes and effects of the various types of ionospheric disturbances are examined and methods of predicting ...
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Determination of travelling ionospheric disturbances
Journal of Atmospheric and Terrestrial Physics, 1978A total of 35 days of Faraday rotation data was obtained from the ATS-6 radio beacon experiment operating with the closely spaced network of Elbert, Table Mountain, and Fort Morgan. The 140-MHz Faraday bandpass data are uncorrelated in the transmission range from 8 to 45 minutes. There are distinct, well correlated, and time-displaced maxima and minima
W. Degenhardt, G.K. Hartmann, K. Davies
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Tsunami Ionospheric Disturbances
2019Big earthquakes and tsunamis can excite acoustic resonance between the land or ocean surface and the lower atmosphere. The wave amplitude increases against the decrease of the atmosphere density, making the upper atmosphere a good medium to propagate the gravity waves.
Shuanggen Jin, R. Jin, X. Liu
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Ionospheric disturbances due to thunderstorms†
International Journal of Electronics, 1973Abstract The paper gives an account of the disturbances in the ionosphere due to the acoustic gravity waves produced by thunderstorms. It explains the phenomena that the ionospheric disturbances in the F-region are numerous and much more pronounced than in the E-region. It describes the mode of travelling of ionospheric disturbances due to horizontally
JAGDISH RAI +2 more
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Ionospheric disturbances in Canada
Journal of Geophysical Research, 1952Detailed analysis has been made of variations of F region ionization and of abnormally high absorption taking place during ionospherically disturbed periods at northern latitudes. It was found that the disturbance effect appears first in one part of the auroral zone and moves around the earth with the sun for several days. The effect of the disturbance
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Wave-like Disturbances in the Ionosphere
Nature, 1973BEER1 has recently suggested that atmospheric gravity waves could be expected to exist in the ionosphere as a result of the supersonic motion of the terminator. He reached this conclusion by drawing an analogy between the proposed production of gravity waves by the supersonic motion of the Moon's shadow on the Earth's atmosphere during a solar eclipse2,
W. J. RAITT, D. H. CLARK
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Continental maps of four ionospheric disturbances
Journal of Geophysical Research, 1952Measurements of ƒ°F2 at 13 North American ionospheric stations are used to study the geographical distribution of ƒ°F2 deviations from normal and the changes with time during four ionospheric disturbances. In two of these, storm centers can be identified which appear to move across the maps during the disturbance.
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