Swarm SCARF equatorial electric field inversion chain

The day-time eastward equatorial electric field (EEF) in the ionospheric E -region plays a crucial role in equatorial ionospheric dynamics. It is responsible for driving the equatorial electrojet (EEJ) current system, equatorial vertical ion drifts, and the equatorial ionization anomaly (EIA). Due t...

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Vydáno v:	Earth, planets, and space Ročník 65; číslo 11; s. 1309 - 1317
Hlavní autoři:	Alken, Patrick, Maus, Stefan, Vigneron, Pierre, Sirol, Olivier, Hulot, Gauthier
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	Berlin/Heidelberg Springer Berlin Heidelberg 01.01.2013 Springer Nature B.V Springer / Terra Scientific Publishing Company
Témata:	Earth and Environmental Science Earth Sciences Electric fields Geology Geomagnetic field Geophysics Geophysics/Geodesy Ionization Ionosphere Latitude Sciences of the Universe Swarm electric fields space magnetometry Equatorial ionosphere
ISSN:	1343-8832, 1880-5981
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Abstract	The day-time eastward equatorial electric field (EEF) in the ionospheric E -region plays a crucial role in equatorial ionospheric dynamics. It is responsible for driving the equatorial electrojet (EEJ) current system, equatorial vertical ion drifts, and the equatorial ionization anomaly (EIA). Due to its importance, there is much interest in accurately measuring and modeling the EEF for both climatological and near real-time studies. The Swarm satellite mission offers a unique opportunity to estimate the equatorial electric field from measurements of the geomagnetic field. Due to the near-polar orbits of each satellite, the on-board magnetometers record a full profile in latitude of the ionospheric current signatures at satellite altitude. These latitudinal magnetic profiles are then modeled using a first principles approach with empirical climatological inputs specifying the state of the ionosphere. Since the EEF is the primary driver of the low-latitude ionospheric current system, the observed magnetic measurements can then be inverted for the EEF. This paper details the algorithm for recovering the EEF from Swarm geomagnetic field measurements. The equatorial electric field estimates are an official Swarm level-2 product developed within the Swarm SCARF (Satellite Constellation Application Research Facility). They will be made freely available by ESA after the commissioning phase.
AbstractList	The daytime eastward equatorial electric field (EEF) in the ionospheric E-region plays a crucial role in equatorial ionospheric dynamics. It is responsible for driving the equatorial electrojet (EEJ) current system, equatorial vertical ion drifts, and the equatorial ionization anomaly (EIA). Due to its importance, there is much interest in accurately measuring and modeling the EEF for both climatological and near real-time studies. The Swarm satellite mission offers a unique opportunity to estimate the equatorial electric field from measurements of the geomagnetic field. Due to the near-polar orbits of each satellite, the on-board magnetometers record a full profile in latitude of the ionospheric current signatures at satellite altitude. These latitudinal magnetic profiles are then modeled using a first principles approach with empirical climatological inputs specifying the state of the ionosphere. Since the EEF is the primary driver of the low-latitude ionospheric current system, the observed magnetic measurements can then be inverted for the EEF. This paper details the algorithm for recovering the EEF from Swarm geomagnetic field measurements. The equatorial electric field estimates are an official Swarm level-2 product developed within the Swarm SCARF (Satellite Constellation Application Research Facility). They will be made freely available by ESA after the commissioning phase. The day-time eastward equatorial electric field (EEF) in the ionospheric E -region plays a crucial role in equatorial ionospheric dynamics. It is responsible for driving the equatorial electrojet (EEJ) current system, equatorial vertical ion drifts, and the equatorial ionization anomaly (EIA). Due to its importance, there is much interest in accurately measuring and modeling the EEF for both climatological and near real-time studies. The Swarm satellite mission offers a unique opportunity to estimate the equatorial electric field from measurements of the geomagnetic field. Due to the near-polar orbits of each satellite, the on-board magnetometers record a full profile in latitude of the ionospheric current signatures at satellite altitude. These latitudinal magnetic profiles are then modeled using a first principles approach with empirical climatological inputs specifying the state of the ionosphere. Since the EEF is the primary driver of the low-latitude ionospheric current system, the observed magnetic measurements can then be inverted for the EEF. This paper details the algorithm for recovering the EEF from Swarm geomagnetic field measurements. The equatorial electric field estimates are an official Swarm level-2 product developed within the Swarm SCARF (Satellite Constellation Application Research Facility). They will be made freely available by ESA after the commissioning phase. The day-time eastward equatorial electric field (EEF) in the ionospheric E-region plays a crucial role in equatorial ionospheric dynamics. It is responsible for driving the equatorial electrojet (EEJ) current system, equatorial vertical ion drifts, and the equatorial ionization anomaly (EIA). Due to its importance, there is much interest in accurately measuring and modeling the EEF for both climatological and near real-time studies. The Swarm satellite mission offers a unique opportunity to estimate the equatorial electric field from measurements of the geomagnetic field. Due to the near-polar orbits of each satellite, the on-board magnetometers record a full profile in latitude of the ionospheric current signatures at satellite altitude. These latitudinal magnetic profiles are then modeled using a first principles approach with empirical climatological inputs specifying the state of the ionosphere. Since the EEF is the primary driver of the low-latitude ionospheric current system, the observed magnetic measurements can then be inverted for the EEF. This paper details the algorithm for recovering the EEF from Swarm geomagnetic field measurements. The equatorial electric field estimates are an official Swarm level-2 product developed within the Swarm SCARF (Satellite Constellation Application Research Facility). They will be made freely available by ESA after the commissioning phase.
Author	Vigneron, Pierre Maus, Stefan Sirol, Olivier Alken, Patrick Hulot, Gauthier
Author_xml	– sequence: 1 givenname: Patrick surname: Alken fullname: Alken, Patrick email: patrick.alken@noaa.gov organization: National Geophysical Data Center, NOAA, Equipe de Géomagnétisme, Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot – sequence: 2 givenname: Stefan surname: Maus fullname: Maus, Stefan organization: National Geophysical Data Center, NOAA – sequence: 3 givenname: Pierre surname: Vigneron fullname: Vigneron, Pierre organization: Equipe de Géomagnétisme, Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot – sequence: 4 givenname: Olivier surname: Sirol fullname: Sirol, Olivier organization: Equipe de Géomagnétisme, Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot – sequence: 5 givenname: Gauthier surname: Hulot fullname: Hulot, Gauthier organization: Equipe de Géomagnétisme, Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot
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Cites_doi	10.1186/BF03351933 10.1029/2004SW000095 10.1029/2009GL041989 10.1016/0021-9169(77)90020-4 10.1016/j.jastp.2008.04.021 10.1029/2008JA013541 10.1016/j.jastp.2004.01.034 10.1016/0021-9169(76)90118-5 10.1016/0021-9169(73)90007-X 10.1016/j.jastp.2004.07.030 10.1029/97GL00373 10.5047/eps.2013.09.007 10.5047/eps.2013.08.006 10.1029/2008GL033580 10.1029/2009EO250002 10.1029/2010RS004557 10.1016/j.jastp.2009.02.006 10.5047/eps.2013.07.008 10.1016/0021-9169(81)90051-9 10.1007/s00190-010-0427-x 10.5047/eps.2013.07.005 10.1029/RG019i003p00469 10.1029/91JA01951 10.5194/angeo-24-1305-2006 10.5047/eps.2013.07.001 10.1029/JA095iA01p00189 10.1029/2008JA013668 10.5636/jgg.47.191 10.1029/JA074i016p04025 10.1029/2007JA012801 10.1007/978-3-540-38366-6 10.1029/2002JA009430 10.1029/2006GC001269 10.1016/j.proche.2009.07.158 10.1029/2004GL020800 10.1029/2012JA018314 10.1029/2002JA009656
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Copyright	The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences; TERRAPUB 2013 The Society of Geomagnetism and Earth, Planetary and Space Sciences, The Seismological Society of Japan 2013 Distributed under a Creative Commons Attribution 4.0 International License
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Snippet	The day-time eastward equatorial electric field (EEF) in the ionospheric E -region plays a crucial role in equatorial ionospheric dynamics. It is responsible... The day-time eastward equatorial electric field (EEF) in the ionospheric E-region plays a crucial role in equatorial ionospheric dynamics. It is responsible... The daytime eastward equatorial electric field (EEF) in the ionospheric E-region plays a crucial role in equatorial ionospheric dynamics. It is responsible for...
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SubjectTerms	Earth and Environmental Science Earth Sciences Electric fields Geology Geomagnetic field Geophysics Geophysics/Geodesy Ionization Ionosphere Latitude Sciences of the Universe
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Title	Swarm SCARF equatorial electric field inversion chain
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