Results 171 to 180 of about 5,760 (194)
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Journal of Atmospheric and Solar-Terrestrial Physics, 2018
Abstract The effect of the geomagnetic storm on the equatorial ionization anomaly (EIA) and equatorial temperature anomaly (ETA) has been studied using the atomic oxygen dayglow emissions at 577.7 nm (OI 557.7 nm) and 732.0 nm (OII 732.0 nm). For the purpose of this study, four intense geomagnetic storms during the ascending phase of solar cycle 24 ...
Gaurav Bharti +2 more
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Abstract The effect of the geomagnetic storm on the equatorial ionization anomaly (EIA) and equatorial temperature anomaly (ETA) has been studied using the atomic oxygen dayglow emissions at 577.7 nm (OI 557.7 nm) and 732.0 nm (OII 732.0 nm). For the purpose of this study, four intense geomagnetic storms during the ascending phase of solar cycle 24 ...
Gaurav Bharti +2 more
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Recent developments in the understanding of equatorial ionization anomaly: A review
Journal of Atmospheric and Solar-Terrestrial Physics, 2018Abstract A brief review of the recent developments in the understanding of the equatorial plasma fountain (EPF) and equatorial ionization anomaly (EIA) under quiet and active conditions is presented. It is clarified that (1) the EPF is not upward ExB plasma drift at the equator followed by downward plasma diffusion, but it is field perpendicular ExB ...
N. Balan, J. Souza, G.J. Bailey
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Journal of Atmospheric and Solar-Terrestrial Physics, 2008
Abstract Measurements from ground-based receiver chains of the global positioning system (GPS) and magnetometers of the Circum-pan Pacific Magnetometer Network (CPMN) in the west Pacific region during 1999–2003 are examined. The ionospheric total electron content (TEC) derived from the GPS receivers is used to observe the strength, location, and ...
C.H. Chen +4 more
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Abstract Measurements from ground-based receiver chains of the global positioning system (GPS) and magnetometers of the Circum-pan Pacific Magnetometer Network (CPMN) in the west Pacific region during 1999–2003 are examined. The ionospheric total electron content (TEC) derived from the GPS receivers is used to observe the strength, location, and ...
C.H. Chen +4 more
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Six‐Day Periodic Variation in Equatorial Ionization Anomaly Region
Journal of Geophysical Research: Space Physics, 2020AbstractUsing the location of equatorial ionization anomaly (EIA) crest derived from GPS observations and CHAllenging Minisatellite Payload (CHAMP) satellite measurement, along with the F2 layer peak height (hmF2), critical frequency (foF2), and the equatorial electrojet (EEJ) in India and China longitudinal sectors, we found the obvious 6‐day ...
X. H. Mo, D. H. Zhang
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Role of equatorial ionization anomaly in the initiation of equatorial spread F
Journal of Geophysical Research: Space Physics, 1988A comparative study is made of the changes in the latitudinal structure of the F region electron density at fixed altitudes in the Indian equatorial region on days with and without postsunset onset of equatorial spread F, using (N‐h) profile data of Ahmedabad (dip latitude 18.6°N), Waltair (dip latitude 10.6°N), and Kodaikanal (dip latitude 1.5°N).
R. Raghavarao +4 more
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Toward prediction of L band scintillations in the equatorial ionization anomaly region
Journal of Geophysical Research: Space Physics, 2011G. Manju +3 more
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Long-Term Trends in the Equatorial Ionization Anomaly 
2022<p>Due to the special geometry of the electric and magnetic fields at the equator, the vertical ExB drift removes plasma from the geomagnetic equator via an equatorial plasma fountain. This process forms the equatorial ionization anomaly (EIA) by creating the crests at/around 20&#176; latitudes on either side of the geomagnetic ...
Sovit Khadka, Andrew Gerrard
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Two‐day oscillation of the equatorial ionization anomaly
Journal of Geophysical Research: Space Physics, 1992The day‐to‐day variability of the equatorial ionization anomaly (EIA), especially the 2‐day oscillation of the EIA, has recently been studied in China. We suggest that the main driving source of the 2‐day oscillation (or the day‐to‐day variation) of the EIA is a planetary wave with a 2‐day period (or the superposition of planetary waves with different ...
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Advances in Space Research, 2018
Abstract We study the relationship of equatorial ionization anomaly (EIA) to the occurrence of nighttime equatorial spread F (ESF) using data from ground-based GPS stations and a horizontal meridional neutral wind model for the East African sector. Anomaly strength, symmetry of anomaly crests, horizontal meridional wind magnitude and direction, and ...
Ephrem Beshir Seba +2 more
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Abstract We study the relationship of equatorial ionization anomaly (EIA) to the occurrence of nighttime equatorial spread F (ESF) using data from ground-based GPS stations and a horizontal meridional neutral wind model for the East African sector. Anomaly strength, symmetry of anomaly crests, horizontal meridional wind magnitude and direction, and ...
Ephrem Beshir Seba +2 more
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Advances in Space Research, 2021
Abstract In this study, the association of Equatorial Ionization Anomaly (EIA) with various post sunset ionospheric irregularity manifestations are brought out empirically using Global Positioning System derived Total Electron Content (GPS - TEC) data from five stations centered around 77° E longitude as well as ionosonde data at a dip equatorial ...
R.P Aswathy, G. Manju
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Abstract In this study, the association of Equatorial Ionization Anomaly (EIA) with various post sunset ionospheric irregularity manifestations are brought out empirically using Global Positioning System derived Total Electron Content (GPS - TEC) data from five stations centered around 77° E longitude as well as ionosonde data at a dip equatorial ...
R.P Aswathy, G. Manju
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