Possible ionospheric preconditioning by shear flow leading to equatorial spread F [PDF]
Annales Geophysicae, 2005 Vertical shear in the zonal plasma drift speed is apparent in incoherent and coherent scatter radar observations of the bottomside F region ionosphere made at Jicamarca from about 1600–2200 LT.
D. L. Hysell, E. Kudeki, J. L. Chau
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Interaction of plasma drifts: A hypothesis for equatorial spread F occurrence
Journal of Space Weather and Space ClimateStudies on the generation mechanisms of post-sunset ionospheric irregularities, which constitute a threat to trans-ionospheric radio propagation, particularly at the African sector, are quite sparse.
Oyeyemi Elijah Oyedola +5 more
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Impact of meridional winds on the development of equatorial plasma bubbles: a review
Frontiers in Astronomy and Space SciencesThe impact of meridional winds on the onset and evolution of equatorial plasma bubbles (EPBs) is reviewed. The conventional wisdom had been that transequatorial meridional winds have a stabilizing effect on the development of EPBs during equatorial ...
J. D. Huba
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A minimum in the latitude variation of spread-F at March equinox
Progress in Earth and Planetary Science, 2018 This short paper presents the statistics of spread-F occurrence at four low-mid latitude locations (17.0° N, 21.2° N, 26.5° N and 36.5° N mag. lat.) in Japan longitude sector (~ 135° E) in March to April 2002, 2003 and 2006 (high, medium and low solar ...
N. Balan +3 more
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Investigation of the possible relationship between the occurrences of atmospheric gravity waves and equatorial Spread-F. [PDF]
Heliyon, 2023 Olawepo AO, Olagunju OE, Ajani OV.
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Statistical analysis of low-latitude spread F observed over Puer, China, during 2015–2016
Earth, Planets and Space, 2019 Statistical analysis of spread F (SF), recorded at Puer (PUR, 22.7° N, 101.05° E, Dip Latitude 12.9° N) during 2015–2016, was carried out to reveal its characteristics at the northern equatorial ionization anomaly.
Ting Lan +5 more
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Seasonal variations of equatorial spread-F
Annales GeophysicaeThe occurrence of spread-F at Trivandrum (8.5°N, 77°E, dip 0.5°N) has been investigated on a seasonal basis in sunspot maximum and minimum years in terms of the growth rate of irregularities by the generalized collisional Rayleigh-Taylor (GRT ...
B. V. Krishna Murthy, K. S. V. Subbarao
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HF radar observations of equatorial spread-F over West Africa
Annales GeophysicaeNew experimental data depicting equatorial spread-F were taken during an HF radar sounding campaign in Korhogo (Ivory Coast, 9°24N, 5°37W, dip 4°S). Range-time-intensity maps of the radar echoes have been analyzed to identify the signatures of density ...
J.-F. Cécile, P. Vila, E. Blanc
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Predicting Equatorial Spread F at JICAMARCA Sector Via Supervised Machine Learning
Space WeatherThe nighttime equatorial spread‐F (ESF) occurrence is essential to cause disturbances of the trans‐ionospheric radio wave signals. Previous research has successfully modeled the probability or growth rate of ESF, but remains deficient in distinguishing ...
Shunzu Gao +6 more
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Learned Regularizations for Multi‐Parameter Elastic Full Waveform Inversion Using Diffusion Models
Journal of Geophysical Research: Machine Learning and ComputationElastic full waveform inversion (EFWI) promises to account for the Earth's elastic nature and corresponding reflectivity, which is often disregarded in the commonly used acoustic FWI.
Mohammad H. Taufik +2 more
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