Ion composition measurements and modelling at altitudes from 140 to 350 km using EISCAT measurements
This work aims at processing the data of CP1 and CP2 programs of EISCAT ionospheric radar from 1987 to 1994 using the "full profile" method which allows to solve the "temperature-composition" ambiguity problem in the lower F region. The program of data analysis was developed in t...
Published in: | Annales Geophysicae |
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00037210 2023-05-15T16:04:29+02:00 Ion composition measurements and modelling at altitudes from 140 to 350 km using EISCAT measurements Litvin, A. Kofman, W. Cabrit, B. 1998-10 electronic https://doi.org/10.1007/s00585-998-1159-6 https://noa.gwlb.de/receive/cop_mods_00037210 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00037164/angeo-16-1159-1998.pdf https://angeo.copernicus.org/articles/16/1159/1998/angeo-16-1159-1998.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/s00585-998-1159-6 https://noa.gwlb.de/receive/cop_mods_00037210 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00037164/angeo-16-1159-1998.pdf https://angeo.copernicus.org/articles/16/1159/1998/angeo-16-1159-1998.pdf https://open-access.net/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 1998 ftnonlinearchiv https://doi.org/10.1007/s00585-998-1159-6 2022-02-08T22:43:37Z This work aims at processing the data of CP1 and CP2 programs of EISCAT ionospheric radar from 1987 to 1994 using the "full profile" method which allows to solve the "temperature-composition" ambiguity problem in the lower F region. The program of data analysis was developed in the CEPHAG in 1995–1996. To improve this program, we implemented another analytical function to model the ion composition profile. This new function better reflects the real profile of the composition. Secondly, we chose the best method to select the initial conditions for the "full profile" procedure. A statistical analysis of the results was made to obtain the averages of various parameters: electron concentration and temperature, ion temperature, composition and bulk velocity. The aim is to obtain models of the parameter behaviour defining the ion composition profiles : z50 (transition altitude between atomic and molecular ions) and dz (width of the profile), for various seasons and for high and low solar activities. These models are then compared to other models. To explain the principal features of parameters z50 and dz, we made an analysis of the processes leading to composition changes and related them to production and electron density profile. A new experimental model of ion composition is now available. Key words. Auroral ionosphere · Ion chemistry and composition · Instruments and techniques · EISCAT Article in Journal/Newspaper EISCAT Niedersächsisches Online-Archiv NOA Annales Geophysicae 16 10 1159 1168 |
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article Verlagsveröffentlichung Litvin, A. Kofman, W. Cabrit, B. Ion composition measurements and modelling at altitudes from 140 to 350 km using EISCAT measurements |
topic_facet |
article Verlagsveröffentlichung |
description |
This work aims at processing the data of CP1 and CP2 programs of EISCAT ionospheric radar from 1987 to 1994 using the "full profile" method which allows to solve the "temperature-composition" ambiguity problem in the lower F region. The program of data analysis was developed in the CEPHAG in 1995–1996. To improve this program, we implemented another analytical function to model the ion composition profile. This new function better reflects the real profile of the composition. Secondly, we chose the best method to select the initial conditions for the "full profile" procedure. A statistical analysis of the results was made to obtain the averages of various parameters: electron concentration and temperature, ion temperature, composition and bulk velocity. The aim is to obtain models of the parameter behaviour defining the ion composition profiles : z50 (transition altitude between atomic and molecular ions) and dz (width of the profile), for various seasons and for high and low solar activities. These models are then compared to other models. To explain the principal features of parameters z50 and dz, we made an analysis of the processes leading to composition changes and related them to production and electron density profile. A new experimental model of ion composition is now available. Key words. Auroral ionosphere · Ion chemistry and composition · Instruments and techniques · EISCAT |
format |
Article in Journal/Newspaper |
author |
Litvin, A. Kofman, W. Cabrit, B. |
author_facet |
Litvin, A. Kofman, W. Cabrit, B. |
author_sort |
Litvin, A. |
title |
Ion composition measurements and modelling at altitudes from 140 to 350 km using EISCAT measurements |
title_short |
Ion composition measurements and modelling at altitudes from 140 to 350 km using EISCAT measurements |
title_full |
Ion composition measurements and modelling at altitudes from 140 to 350 km using EISCAT measurements |
title_fullStr |
Ion composition measurements and modelling at altitudes from 140 to 350 km using EISCAT measurements |
title_full_unstemmed |
Ion composition measurements and modelling at altitudes from 140 to 350 km using EISCAT measurements |
title_sort |
ion composition measurements and modelling at altitudes from 140 to 350 km using eiscat measurements |
publisher |
Springer Verlag |
publishDate |
1998 |
url |
https://doi.org/10.1007/s00585-998-1159-6 https://noa.gwlb.de/receive/cop_mods_00037210 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00037164/angeo-16-1159-1998.pdf https://angeo.copernicus.org/articles/16/1159/1998/angeo-16-1159-1998.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/s00585-998-1159-6 https://noa.gwlb.de/receive/cop_mods_00037210 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00037164/angeo-16-1159-1998.pdf https://angeo.copernicus.org/articles/16/1159/1998/angeo-16-1159-1998.pdf |
op_rights |
https://open-access.net/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1007/s00585-998-1159-6 |
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Annales Geophysicae |
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16 |
container_issue |
10 |
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1159 |
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