Results 1 to 10 of about 3,568,047 (295)
Geomagnetic storm and equatorial spread-F [PDF]
Annales Geophysicae, 2004 In August 2000, a new ionospheric sounding station was established at Sao Jose dos Campos (23.2° S, 45.9° W; dip latitude 17.6° S), Brazil, by the University of Vale do Paraiba (UNIVAP). Another ionospheric sounding station was established
F. Becker-Guedes +6 more
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Upwelling coherent backscatter plumes observed with ionosondes in low-latitude region
Journal of Space Weather and Space Climate, 2022 Investigations of upwelling backscatter plumes are mostly from observations of VHF radars. This study reports the first observation of upwelling backscatter plumes (backscatter echoes beyond the critical frequency of the F2 layer, foF2) recorded by ...
Jiang Chunhua +9 more
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Universe, 2022 By using ionosonde data recorded at Chiang Mai (18.8° N, 98.9° E, magnetic latitude is 9.1° N), Puer (22.7° N, 101.1° E, magnetic latitude is 12.9° N), and Leshan (29.6° N, 103.7° E, magnetic latitude is 19.8° N), the statistical features of different ...
Ting Lan +5 more
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Topside equatorial spread F-related field-aligned Poynting flux: observations and simulations
Earth, Planets and Space, 2022 Electric and magnetic field data from the Swarm constellation mission are used to report on the Poynting flux associated with postsunset topside equatorial spread F.
J. Rodríguez-Zuluaga +3 more
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Remote Sensing, 2021 In the current study, we investigated the mechanism of medium-scale traveling ionospheric disturbance (MSTID) triggering spread-F in the low latitude ionosphere using ionosonde observation and Global Navigation Satellite System-Total Electron Content ...
Zhongxin Deng +8 more
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Resolution of the equatorial spread F problem: Revisited
Frontiers in Astronomy and Space Sciences, 2023 An overview of recent advances made in understanding the phenomenon of equatorial spread F (ESF) is presented and a discussion of unresolved issues that need to be addressed. The focus is on research that has occurred in the last decade.
J. D. Huba
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Gravity wave and tidal influences on equatorial spread F based on observations during the Spread F Experiment (SpreadFEx) [PDF]
Annales Geophysicae, 2008 The Spread F Experiment, or SpreadFEx, was performed from September to November 2005 to define the potential role of neutral atmosphere dynamics, primarily gravity waves propagating upward from the lower atmosphere, in seeding equatorial spread F (ESF)
D. C. Fritts +10 more
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Equatorial spread F fossil plumes [PDF]
Annales Geophysicae, 2010 Behaviour of equatorial spread F (ESF) fossil plumes, i.e., ESF plumes that have stopped rising, is examined using the NRL SAMI3/ESF three-dimensional simulation code.
J. Krall +3 more
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The Effect of Equatorial Spread F on Relative Orbit Determination of GRACE Using Differenced GPS Observations [PDF]
Journal of Astronomy and Space Sciences, 2009 In this paper, relative orbit of Low Earth Orbit satellites is determined using only GPS measurements and the effects of Equatorial Spread-F (ESF), that is one of biggest ionospheric irregularities, are investigated.
Kyoung-Min Roh +3 more
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Letter to the Editor: Post-midnight onset of spread-F at Kodaikanal during the June solstice of solar minimum [PDF]
Annales Geophysicae, 1999 At dip equatorial stations in the Indian zone, spread-F conditions are known to develop preferentially around midnight during the June solstice (northern summer) months of low solar activity, in association with a distinct increase in F layer height ...
J. H. Sastri
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