Results 11 to 20 of about 5,760 (194)

Equatorial Ionization Anomaly Discontinuity Observed by GOLD, COSMIC‐2, and Ground‐Based GPS Receivers' Network

Geophysical Research Letters, 2023
We report a new ionosphere phenomenon: Equatorial ionization anomaly (EIA) discontinuity (EIAD), based on OI 135.6 nm radiance observations from the Global Observations of Limb and Disk (GOLD), ground‐based total electron content maps and in‐situ ion ...
Xuguang Cai, Wenbin Wang, Richard W. Eastes, Liying Qian, Nicholas.M. Pedatella, Ercha Aa, Shunrong Zhang, Anthea Coster, Robert E. Daniell, William E. McClintock   +9 more
doaj   +2 more sources

Quiet Time Ionopheric Irregularities Over the African Equatorial Ionization Anomaly Region [PDF]

Radio Science, 2020
AbstractThis paper investigated variations of quiet time ionospheric irregularities over the African equatorial ionization anomaly using the rate of change of total electron content index. Irregularities were quantified in terms of percentage occurrence and examined along with parameter of the anomaly, mainly its strength and the asymmetry of the ...
Paul O. Amaechi, Elijah O. Oyeyemi, Andrew O. Akala, Elijah O. Falayi, Mohamed Kaab, Zouhair Benkhaldoun, Christine‐Amory Mazaudier   +6 more
openaire   +4 more sources

GOLD Mission's Observation About the Geomagnetic Storm Effects on the Nighttime Equatorial Ionization Anomaly (EIA) and Equatorial Plasma Bubbles (EPB) During a Solar Minimum Equinox

Space Weather, 2023
The nighttime ionospheric response to a geomagnetic storm that occurred on 23–29 September 2020 is investigated over the South American, Atlantic, and West African longitude sectors using NASA's Global‐scale Observations of the Limb and Disk measurements.
Deepak Kumar Karan, Richard W. Eastes, Robert E. Daniell, Carlos R. Martinis, William E. McClintock   +4 more
doaj   +2 more sources

Estimating the daytime Equatorial Ionization Anomaly strength from electric field proxies [PDF]

Journal of Geophysical Research: Space Physics, 2008
The Equatorial Ionization Anomaly (EIA) is a significant feature of the low‐latitude ionosphere. During daytime, the eastward electric field drives a vertical plasma fountain at the magnetic equator creating the EIA. Since the eastward electric field is also the driving force for the Equatorial Electrojet (EEJ), the latter is positively correlated with
Stolle, C., Manoj, C., Lühr, H., Maus, S., Alken, P.   +4 more
openaire   +6 more sources

Super plasma fountain and equatorial ionization anomaly during penetration electric field [PDF]

Journal of Geophysical Research: Space Physics, 2009
Relative importance of diffusion, electric field, and neutral wind on equatorial plasma fountain and equatorial ionization anomaly (EIA) during a strong daytime eastward prompt penetration electric field (PPEF) event are evaluated using the Sheffield University Plasmasphere Ionosphere Model and the recorded PPEF during the super geomagnetic storm of 9 ...
N. Balan, K. Shiokawa, Y. Otsuka, S. Watanabe, G. J. Bailey   +4 more
openaire   +3 more sources

Investigation of the response time of the equatorial ionosphere in context of the equatorial electrojet and equatorial ionization anomaly [PDF]

Annales Geophysicae, 2011
Equatorial Electrojet (EEJ) and Equatorial Ionization Anomaly (EIA) are two large-scale processes in the equatorial/low latitude ionosphere, driven primarily by the eastward electric field during daytime.
L. Jose, S. Ravindran, C. Vineeth, T. K. Pant, S. Alex   +4 more
doaj   +3 more sources

Characterizations of the diurnal shapes of OI 630.0 nm dayglow intensity variations: inferences [PDF]

Annales Geophysicae, 2002
Measurements of OI 630.0 nm thermospheric dayglow emission by means of the Dayglow Photometer (DGP) at Mt. Abu (24.6° N, 73.7° E, dip lat 19.09° N), a station under the crest of Equatorial Ionization Anomaly (EIA), reveal day-to-day changes in the ...
D. Chakrabarty, D. Chakrabarty, R. Sekar, H. Chandra, R. Narayanan, B. M. Pathan, K. S. V. Subbarao   +6 more
doaj   +5 more sources

Variation of the Hemispheric Asymmetry of the Equatorial Ionization Anomaly with Solar Cycle

Journal of Astronomy and Space Sciences, 2019
In solstices during the solar minimum, the hemispheric difference of the equatorial ionization anomaly (EIA) intensity (hereafter hemispheric asymmetry) is understood as being opposite in the morning and afternoon.
Young-Sil Kwak, Hyosub Kil, Woo Kyoung Lee   +2 more
doaj   +2 more sources

Motions of the equatorial ionization anomaly crests imaged by FORMOSAT‐3/COSMIC

Geophysical Research Letters, 2007
The equatorial ionization anomaly (EIA) structures and evolutions are imaged using radio occultation observation of the newly launched FORMOSAT‐3/COSMIC (F3/C) satellite constellation. Three‐dimensional ionospheric images provide unprecedented detail of the EIA structure globally. This paper presents images of the EIA structures during July–August 2006
C. H. Lin, J. Y. Liu, T. W. Fang, P. Y. Chang, H. F. Tsai, C. H. Chen, C. C. Hsiao   +6 more
openaire   +3 more sources

GOLD Observations of the Merging of the Southern Crest of the Equatorial Ionization Anomaly and Aurora During the 10 and 11 May 2024 Mother's Day Super Geomagnetic Storm

Geophysical Research Letters
Using NASA's Global‐scale Observations of the Limb and Disk (GOLD) imager, we report nightside ionospheric changes during the G5 super geomagnetic storm of 10 and 11 May 2024.
Deepak Kumar Karan, Carlos R. Martinis, Robert E. Daniell, Richard W. Eastes, Wenbin Wang, William E. McClintock, Robert G. Michell, Scott England   +7 more
doaj   +2 more sources