Self-consistent modelling of the daytime electron density profile in the ionospheric F region
A theoretical self-consistent method for the description of daytime Ne(h) profiles in the ionospheric F region measured by EISCAT is proposed. It is based on the use of a theoretical F-region model and measured electron density, Ne(h), electron, Te(h), and ion temperature, Ti(h), and field-aligned p...
Published in: | Annales Geophysicae |
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Language: | English |
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Springer Verlag
1997
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Online Access: | https://doi.org/10.1007/s00585-997-0314-9 https://noa.gwlb.de/receive/cop_mods_00037617 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00037571/angeo-15-314-1997.pdf https://angeo.copernicus.org/articles/15/314/1997/angeo-15-314-1997.pdf |
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00037617 2023-05-15T16:04:32+02:00 Self-consistent modelling of the daytime electron density profile in the ionospheric F region Mikhailov, A. Schlegel, K. 1997-03 electronic https://doi.org/10.1007/s00585-997-0314-9 https://noa.gwlb.de/receive/cop_mods_00037617 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00037571/angeo-15-314-1997.pdf https://angeo.copernicus.org/articles/15/314/1997/angeo-15-314-1997.pdf eng eng Springer Verlag Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.1007/s00585-997-0314-9 https://noa.gwlb.de/receive/cop_mods_00037617 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00037571/angeo-15-314-1997.pdf https://angeo.copernicus.org/articles/15/314/1997/angeo-15-314-1997.pdf https://open-access.net/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 1997 ftnonlinearchiv https://doi.org/10.1007/s00585-997-0314-9 2022-02-08T22:43:25Z A theoretical self-consistent method for the description of daytime Ne(h) profiles in the ionospheric F region measured by EISCAT is proposed. It is based on the use of a theoretical F-region model and measured electron density, Ne(h), electron, Te(h), and ion temperature, Ti(h), and field-aligned plasma drift Vl(h) profiles. The method describes the observed Ne(h) profile with high accuracy for quiet and disturbed conditions. Two versions of the method are considered: in the first the exospheric temperature Tex is derived from a procedure minimizing [log(Ne(h)obs / Ne(h)cal]2, in the second Tex is deduced from the ion energy conservation in the F region. The method allows us to infer from the incoherent-scatter observations: concentrations of atomic oxygen, [O], molecular oxygen, [O2], molecular nitrogen, [N2] the vertical plasma drift, W, the exospheric temperature. Tex, and the shape parameter S in the neutral temperature profile. The ratio ([O+]/Ne) calculated by the theoretical model is used to correct Te(h), Ti(h) and Ne(h) profiles routinely measured with EISCAT which are known to depend strongly on the actual applied ion-composition model. Such a correction is especially important for geomagnetically disturbed periods when the F region is strongly enriched with molecular ions. We conclude that four of the six thermospheric parameters, namely [O], [N2], W and Tex can be confidently inferred from the EISCAT observations, while the other two derived parameters, [O2] ans S are less reliable. The method can be used for the analysis of long-term (seasonal, solar cycle) as well as for day-to-day variations of the thermospheric parameters and the F-region ion composition using daytime incoherent-scatter observations. Article in Journal/Newspaper EISCAT Niedersächsisches Online-Archiv NOA Annales Geophysicae 15 3 314 326 |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Mikhailov, A. Schlegel, K. Self-consistent modelling of the daytime electron density profile in the ionospheric F region |
topic_facet |
article Verlagsveröffentlichung |
description |
A theoretical self-consistent method for the description of daytime Ne(h) profiles in the ionospheric F region measured by EISCAT is proposed. It is based on the use of a theoretical F-region model and measured electron density, Ne(h), electron, Te(h), and ion temperature, Ti(h), and field-aligned plasma drift Vl(h) profiles. The method describes the observed Ne(h) profile with high accuracy for quiet and disturbed conditions. Two versions of the method are considered: in the first the exospheric temperature Tex is derived from a procedure minimizing [log(Ne(h)obs / Ne(h)cal]2, in the second Tex is deduced from the ion energy conservation in the F region. The method allows us to infer from the incoherent-scatter observations: concentrations of atomic oxygen, [O], molecular oxygen, [O2], molecular nitrogen, [N2] the vertical plasma drift, W, the exospheric temperature. Tex, and the shape parameter S in the neutral temperature profile. The ratio ([O+]/Ne) calculated by the theoretical model is used to correct Te(h), Ti(h) and Ne(h) profiles routinely measured with EISCAT which are known to depend strongly on the actual applied ion-composition model. Such a correction is especially important for geomagnetically disturbed periods when the F region is strongly enriched with molecular ions. We conclude that four of the six thermospheric parameters, namely [O], [N2], W and Tex can be confidently inferred from the EISCAT observations, while the other two derived parameters, [O2] ans S are less reliable. The method can be used for the analysis of long-term (seasonal, solar cycle) as well as for day-to-day variations of the thermospheric parameters and the F-region ion composition using daytime incoherent-scatter observations. |
format |
Article in Journal/Newspaper |
author |
Mikhailov, A. Schlegel, K. |
author_facet |
Mikhailov, A. Schlegel, K. |
author_sort |
Mikhailov, A. |
title |
Self-consistent modelling of the daytime electron density profile in the ionospheric F region |
title_short |
Self-consistent modelling of the daytime electron density profile in the ionospheric F region |
title_full |
Self-consistent modelling of the daytime electron density profile in the ionospheric F region |
title_fullStr |
Self-consistent modelling of the daytime electron density profile in the ionospheric F region |
title_full_unstemmed |
Self-consistent modelling of the daytime electron density profile in the ionospheric F region |
title_sort |
self-consistent modelling of the daytime electron density profile in the ionospheric f region |
publisher |
Springer Verlag |
publishDate |
1997 |
url |
https://doi.org/10.1007/s00585-997-0314-9 https://noa.gwlb.de/receive/cop_mods_00037617 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00037571/angeo-15-314-1997.pdf https://angeo.copernicus.org/articles/15/314/1997/angeo-15-314-1997.pdf |
genre |
EISCAT |
genre_facet |
EISCAT |
op_relation |
Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.1007/s00585-997-0314-9 https://noa.gwlb.de/receive/cop_mods_00037617 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00037571/angeo-15-314-1997.pdf https://angeo.copernicus.org/articles/15/314/1997/angeo-15-314-1997.pdf |
op_rights |
https://open-access.net/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1007/s00585-997-0314-9 |
container_title |
Annales Geophysicae |
container_volume |
15 |
container_issue |
3 |
container_start_page |
314 |
op_container_end_page |
326 |
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1766400112440901632 |