Results 31 to 40 of about 474,530 (188)
Density enhancements associated with equatorial spread F [PDF]
Annales Geophysicae, 2010 Forces governing the three-dimensional structure of equatorial spread-F (ESF) plumes are examined using the NRL SAMI3/ESF three-dimensional simulation code.
J. Krall +3 more
doaj +1 more source
Atmosphere, 2023 Plasma irregularity in the equatorial and low-latitude ionosphere, which leads to ionospheric scintillation, can threaten the operation of radio-based communication and navigation systems. A method for forecasting scintillation activity is still pending.
Guodong Jia +4 more
doaj +1 more source
Earth, Planets and Space, 2019 The response of equatorial ionosphere–thermosphere system to the X3.8 solar flare of January 17, 2005 has been studied using the coordinated measurements of GPS-derived Total Electron Content (TEC), OI 630.0 nm dayglow and magnetic field measurements ...
S. G. Sumod, Tarun Kumar Pant
doaj +1 more source
Remote Sensing, 2021 Ground-based GNSS (Global Navigation Satellite System) reference stations lack the capacity to provide data for ocean regions with sufficient spatial-temporal resolution, limiting the detailed study of the equatorial ionization anomaly (EIA).
Xiaowen Luo +8 more
doaj +1 more source
Prediction of the thermospheric and ionospheric responses to the 21 June 2020 annular solar eclipse
Earth and Planetary Physics, 2020 On 21 June 2020, an annular solar eclipse will traverse the low latitudes from Africa to Southeast Asia. The highest latitude of the maximum eclipse obscuration is approximately 30°.
Tong Dang +5 more
doaj +1 more source
Transition of Interhemispheric Asymmetry of Equatorial Ionization Anomaly During Solstices [PDF]
Journal of Geophysical Research: Space Physics, 2018 AbstractThe magnitudes of the two crests of equatorial ionization anomaly (EIA) vary with local time. During the solstices, EIA crest in the winter hemisphere is larger than that in the summer hemisphere before noon/early afternoon. Whereafter, the crest in the summer hemisphere becomes intensified, and the stronger EIA crest transits to the summer ...
He Huang +4 more
openaire +1 more source
The combined effects of electrojet strength and the geomagnetic activity (Kp-index) on the post sunset height rise of the F-layer and its role in the generation of ESF during high and low solar activity periods [PDF]
Annales Geophysicae, 2007 Several investigations have been carried out to identify the factors that are responsible for the day-to-day variability in the occurrence of equatorial spread-F (ESF). But the precise forecasting of ESF on a day-to-day basis is still far from reality.
S. Tulasi Ram +7 more
doaj +1 more source
Theoretical simulation of O+ and H+ densities in the Indian low latitude F-region and comparison with observations [PDF]
Annales Geophysicae, 2002 The O+ and H+ ion density distributions in the Indian low latitude F-region, within ± 15° magnetic latitudes, are simulated using a time dependent model developed on the basis of solution of the plasma continuity equation.
P. K. Bhuyan +4 more
doaj +1 more source
Early Morning Equatorial Ionization Anomaly From GOLD Observations
Journal of Geophysical Research: Space Physics, 2020 AbstractDuring geomagnetically quiet and solar minimum conditions, spatial variations of the early morning thermosphere‐ionosphere (TI) system are expected to be mainly governed by wave dynamics. To study the postmidnight dynamical coupling, we investigated the early morning equatorial ionization anomaly (EIA) using Global‐scale Observations of the ...
F. I. Laskar +12 more
openaire +2 more sources
Electrojet control of ambient ionization near the crest of the equatorial anomaly in the Indian zone [PDF]
, 2009 A long-term (1978–1990) database of total electron content (TEC) from a location (Calcutta: 22.58° N, 88.38° E geographic, dip: 32° N) near the northern crest of the equatorial ionization anomaly has extensively been studied to ...
R. Hajra, S. K. Chakraborty
core +2 more sources