Results 1 to 10 of about 77,336 (163)
Propagation of a whistler wave incident from above on the lower nighttime ionosphere [PDF]
Annales Geophysicae, 2017 The problems of reflection and transmission of a whistler wave incident in the nighttime ionosphere from above are considered. Numerical solution of the wave equations for a typical condition of the lower ionosphere is found.
P. Bespalov, P. Bespalov, V. Mizonova
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On the nature of nighttime ionisation enhancements observed with the Athens Digisonde [PDF]
Annales Geophysicae, 2002 True height electron density profiles observed with the Athens Digisonde were analyzed together with geomagnetic data indices for six magnetic storms in September and October 2000 in an effort to define the ionospheric structure during events of ...
I. Tsagouri, I. Tsagouri, A. Belehaki
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On the mechanism of the post-midnight winter NmF2 enhancements: dependence on solar activity [PDF]
Annales Geophysicae, 2000 The mechanism of the NmF2 peak formation at different levels of solar activity is analyzed using Millstone Hill IS radar observations. The hmF2 nighttime increase due to thermospheric winds and the downward plasmaspheric fluxes are the key ...
A. V. Mikhailov +2 more
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Earth and Space ScienceTweek atmospherics are ELF/VLF pulse signals with frequency dispersion characteristics that originate from lightning discharges. Previous research has employed tweek atmospherics to examine long‐term trends in the lower ionosphere; however, their utility
Steven A. Cummer +2 more
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Some investigations of ionospheric diurnal variation
地球与行星物理论评, 2021 The most significant and fundamental feature of the ionospheric variations is the diurnal pattern of the ionosphere, which has very interesting and complicated phenomenon.
Libo Liu +4 more
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Український антарктичний журнал, 2021 Ionospheric Weddell Sea anomaly is an inversion of diurnal variation of the electron density in the ionosphere over Antarctic Peninsula, Weddell Sea, and neighbor territories observed during Antarctic summer.
A. Zalizovski +3 more
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Numerical study of the generation and propagation of ultralow-frequency waves by artificial ionospheric F region modulation at different latitudes [PDF]
Annales Geophysicae, 2016 Powerful high-frequency (HF) radio waves can be used to efficiently modify the upper-ionospheric plasmas of the F region. The pressure gradient induced by modulated electron heating at ultralow-frequency (ULF) drives a local oscillating diamagnetic ...
X. Xu +5 more
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Study of mid-latitude nighttime enhancement in F-region electron density using tomographic images over the UK [PDF]
Annales Geophysicae, 2003 Nighttime enhancements in ionospheric electron content (IEC)/peak electron density (NmF2) have been studied by various workers in the equatorial anomaly and mid-latitude regions.
R. S. Dabas, L. Kersley
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Remote Sensing, 2021 This study presents observations of nighttime spread F/ionospheric irregularities and spread Es at low and middle latitudes in the South East Asia longitude of China sectors during the recovery phase of the 7–9 September 2017 geomagnetic storm.
Lehui Wei +7 more
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Atmosphere, 2023 We present the first report of global ionospheric disturbances due to the most powerful Gamma Ray Burst GRB221009A occurred on 9 October 2022. Very Low Frequency (VLF) and Low Frequency (LF) sub-ionospheric radio signals are used to diagnose the effect ...
Sujay Pal +5 more
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