Results 181 to 190 of about 6,222 (212)
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Plasma bubbles and irregularities in the equatorial ionosphere
Journal of Geophysical Research, 1977The Atmosphere Explorer satellite observed large-scale (10 to 200-km) irregular biteouts of up to three orders of magnitude in the ion concentration in the nighttime equatorial F region associated with small-scale inhomogeneities in the ion concentration.
J. P. McClure +2 more
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Statistical characterization of equatorial plasma bubbles over East Africa
Journal of Atmospheric and Solar-Terrestrial Physics, 2020Abstract Bubble-like structures that grow in the post-sunset F-region of the equatorial ionosphere have continued to raise concern and research interest among scientists. These structures, commonly referred to as Equatorial Plasma Bubbles (EPBs), have depleted electron densities surrounded by a denser plasma.
Faustine Abiriga +3 more
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Unstable density distribution associated with equatorial plasma bubble
Physics of Plasmas, 2016In this work, we present a simulation study of equatorial plasma bubble (EPB) in the evening time ionosphere. The fluid simulation is performed with a high grid resolution, enabling us to probe the steepened updrafting density structures inside EPB. Inside the density depletion that eventually evolves as EPB, both density and updraft are functions of ...
E. A. Kherani +4 more
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Equatorial Plasma Bubbles: Occurrence Probability versus Local Time
Geomagnetism and Aeronomy, 2020The character of the variability of the LT distributions of the equatorial plasma bubble occurrence probability with an increase of the recording altitude is under consideration. The conditions of the high and maximal solar activity, when the generation of the plasma bubbles is the most active, are examined.
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Observation of equatorial ionospheric plasma bubbles at peninsular Malaysia
2012 International Symposium on Computer Applications and Industrial Electronics (ISCAIE), 2012The research on observation of equatorial plasma bubbles (EPBs) ionospheric at peninsular Malaysia by using Malaysian Real Time Kinematic Global Positioning System Network (MyRTKnet). Plasma bubbles which usually occur during midnight. This determination is made for satellites in Peninsular Malaysia in the September period of 2007 at Universiti Utara ...
Norsuzila Ya'acob +5 more
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Equatorial ionospheric plasma density bubbles observed by ESRO-4
Planetary and Space Science, 1979Abstract It is shown that the ESRO-4 satellite, in a polar orbit, was able to observe equatorial plasma bubbles using the fixed-bias total ion current probe. Experimental conditions were suitable for observations during a period at the vernal equinox 1973, when 21 plasma density depletion events were identified, extending across the equator ...
M.L. Heron, E.B. Dorling
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Statistical Analysis of Separation Distance between Equatorial Plasma Bubbles
2017 IEEE 13th International Symposium on Autonomous Decentralized System (ISADS), 2017Equatorial plasma bubbles in the low-latitude regions can cause loss-of-lock resulting to the availability of ground-based augmentation system (GBAS) due to increased ionospheric gradients. For realistic simulation, distances between adjacent bubbles need to be determined.
Acharaporn Bumrungkit, Pornchai Supnithi
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Transequatorial propagation through equatorial plasma bubbles—Discrete events
Radio Science, 1980The discrete nature of VHF transequatorial propagation path openings is pointed out. These events are shown to be consistent with the concept of guided propagation inside equatorial plasma bubbles. The important prediction of this work is that observations on discrete transequatorial VHF links may be used to track the production and development of ...
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Equatorial plasma bubbles at altitudes of the topside ionosphere
Geomagnetism and Aeronomy, 2008A consistent patter, indicating that subtroughs in the He+ density and plasma bubbles can be considered as phenomena of the same origin, has been obtained within the scope of the existent model of equatorial plasma bubbles. The study has been performed based on the measurements of the ISS-b satellite, which flew during the period of high solar activity.
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