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Characterization and Climatological Modeling of Equatorial Ionization Anomaly (EIA) Crest Position

Nigussie, Melessew and Jakowski, Norbert and Hoque, Mohammed Mainul (2022) Characterization and Climatological Modeling of Equatorial Ionization Anomaly (EIA) Crest Position. Journal of Geophysical Research: Space Physics, 127, pp. 1-10. Wiley. doi: 10.1029/2022JA030798. ISSN 2169-9380.

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The Equatorial Ionization Anomaly (EIA) is characterized by strong ionospheric gradients that complicate ionospheric modeling and mitigation of ionospheric impact on Global Navigation Satellite System applications. In this study, the variation of EIA crest locations as a function of longitude and solar radio flux index F10.7 has been derived and modeled. Seven years (2013–2019) of ionospheric NmF2 and insitu ion density data from Constellation Observing System for Meteorology Ionosphere and Climate and Swarm-A satellites have been used. We find that the distance between the northern and southern crest of EIA grows slightly with increase of solar flux. The position of the crests of EIA follows a wave number 4 structure with peak values at around −130°, 0°, and 100°E. At the altitude of Swarm-A (about 460 km), the equatorial crests are found closer to the geomagnetic dip equator than they are at the peak density height hmF2 (about 310 km) which may be due to the spatial variations of geomagnetic field strength. Accordingly, two Crest Position climatological Models have been developed, one for the F2 Peak height (CPM-F2P) and the other one for Swarm-A height (CPM-SAH).

Item URL in elib:https://elib.dlr.de/191629/
Document Type:Article
Title:Characterization and Climatological Modeling of Equatorial Ionization Anomaly (EIA) Crest Position
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Nigussie, MelessewBahir Dar Universityhttps://orcid.org/0000-0001-7827-5117UNSPECIFIED
Jakowski, NorbertUNSPECIFIEDhttps://orcid.org/0000-0003-3174-2624UNSPECIFIED
Date:November 2022
Journal or Publication Title:Journal of Geophysical Research: Space Physics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1-10
Keywords:ionosphere, Equatorial Ionization Anomaly (EIA), crest, Electron density, total electron content
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication, Navigation, Quantum Technology
DLR - Research area:Raumfahrt
DLR - Program:R KNQ - Communication, Navigation, Quantum Technology
DLR - Research theme (Project):R - Ionosphere
Location: Neustrelitz
Institutes and Institutions:Institute for Solar-Terrestrial Physics
Deposited By: Jakowski, Dr.rer.nat. Norbert
Deposited On:05 Dec 2022 12:28
Last Modified:28 Feb 2023 14:45

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