Ion composition measurements and modelling at altitudes from 140 to 350 km using EISCAT measurements
International audience 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 anal...
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ftccsdartic:oai:HAL:hal-00329103v1 2023-11-12T04:16:36+01:00 Ion composition measurements and modelling at altitudes from 140 to 350 km using EISCAT measurements Litvin, A. Kofman, W. Cabrit, B. Centre d'Etude des Phénomènes Aléatoires et Géophysiques Université Joseph Fourier - Grenoble 1 (UJF) 1998 https://hal.science/hal-00329103 https://hal.science/hal-00329103/document https://hal.science/hal-00329103/file/angeo-16-1159-1998.pdf en eng HAL CCSD European Geosciences Union hal-00329103 https://hal.science/hal-00329103 https://hal.science/hal-00329103/document https://hal.science/hal-00329103/file/angeo-16-1159-1998.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00329103 Annales Geophysicae, 1998, 16 (10), pp.1159-1168 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 1998 ftccsdartic 2023-10-21T23:03:22Z International audience 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 : z 50 (transition altitude between atomic and molecular ions) and d z (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 z 50 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. Article in Journal/Newspaper EISCAT Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Litvin, A. Kofman, W. Cabrit, B. Ion composition measurements and modelling at altitudes from 140 to 350 km using EISCAT measurements |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience 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 : z 50 (transition altitude between atomic and molecular ions) and d z (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 z 50 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. |
author2 |
Centre d'Etude des Phénomènes Aléatoires et Géophysiques Université Joseph Fourier - Grenoble 1 (UJF) |
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 |
HAL CCSD |
publishDate |
1998 |
url |
https://hal.science/hal-00329103 https://hal.science/hal-00329103/document https://hal.science/hal-00329103/file/angeo-16-1159-1998.pdf |
genre |
EISCAT |
genre_facet |
EISCAT |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00329103 Annales Geophysicae, 1998, 16 (10), pp.1159-1168 |
op_relation |
hal-00329103 https://hal.science/hal-00329103 https://hal.science/hal-00329103/document https://hal.science/hal-00329103/file/angeo-16-1159-1998.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782333657988464640 |