[en] We provide the first comparison of the ICON-EUV O+ density profile with radio wave datasets coming from GNSS radio-occultation, ionosondes and incoherent scatter radar. The peak density and height deduced from those different observation techniques are compared. It is found that the EUV-deduced peak density is smaller than that from other techniques by 50 to 60%, while the altitude of the peak is retrieved with a slight bias of 10 to 20 km on average. These average values are found to vary between November 2019 and March 2021. Magnetic latitude and local time are not factors significantly influencing this variability. In contrast, the EUV density is closer to that deduced from radio-wave techniques in the mid latitude region, i.e. where the ionospheric crests do not play a role. The persistent very low solar activity conditions prevailing during the studied time interval challenge the EUV O+ density profile retrieval technique. These values are consistent, both in magnitude and direction, with a systematic error on the order of 10% in the data or the forward model, or a combination of both. Ultimately, the EUV instrument on-board ICON provides the only known technique capable of precisely monitoring the ionospheric peak properties at daytime from a single space platform, on a global scale and at high cadence. This feature paves the way to transpose the technology to the study of the ionosphere surrounding other planets.
Disciplines :
Earth sciences & physical geography Space science, astronomy & astrophysics Physical, chemical, mathematical & earth Sciences: Multidisciplinary, general & others
Author, co-author :
Wautelet, Gilles ; Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR)
Hubert, Benoît ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Gérard, Jean-Claude ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Immel, Thomas; UCB - University of California Berkeley [US] > Space Sciences Laboratory
Sirk, Martin; UCB - University of California Berkeley [US] > Space Sciences Laboratory
Korpela, Eric; UCB - University of California Berkeley [US] > Space Sciences Laboratory
Stephan, Andrew; U.S. Naval Research Laboratory
Mende, Stephen; UCB - University of California Berkeley [US] > Space Sciences Laboratory
England, Scott; Virginia Tech > Aerospace & Ocean Engineering
Erickson, Philip; MIT - Massachusetts Institute of Technology [US] > Haystack Observatory
Language :
English
Title :
Comparison of ICON-EUV F-peak characteristic parameters with external data sources
Publication date :
November 2022
Journal title :
Space Science Reviews
ISSN :
0038-6308
eISSN :
1572-9672
Publisher :
Kluwer Academic Publishers, Netherlands
Special issue title :
The Ionospheric Connection Explorer (ICON) Mission: First Results
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