An optimised method for calculating the O + -O collision parameter from aeronomical measurements
A study has been made of the interaction between the thermosphere and the ionosphere at high latitudes, with particular regard to the value of the O + -O collision parameter. The European incoherent scatter radar (EISCAT) was used to make tristatic measurements of plasma parameters at F-region altit...
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Copernicus Publications
1995
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Online Access: | https://doi.org/10.1007/s00585-995-0541-x https://doaj.org/article/c33c0305a9c447c9bcb15d25ca3122bf |
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ftdoajarticles:oai:doaj.org/article:c33c0305a9c447c9bcb15d25ca3122bf 2023-05-15T16:04:46+02:00 An optimised method for calculating the O + -O collision parameter from aeronomical measurements C. J. Davis A. D. Farmer A. Aruliah 1995-05-01T00:00:00Z https://doi.org/10.1007/s00585-995-0541-x https://doaj.org/article/c33c0305a9c447c9bcb15d25ca3122bf EN eng Copernicus Publications https://www.ann-geophys.net/13/541/1995/angeo-13-541-1995.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.1007/s00585-995-0541-x 0992-7689 1432-0576 https://doaj.org/article/c33c0305a9c447c9bcb15d25ca3122bf Annales Geophysicae, Vol 13, Pp 541-550 (1995) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 1995 ftdoajarticles https://doi.org/10.1007/s00585-995-0541-x 2022-12-30T23:17:35Z A study has been made of the interaction between the thermosphere and the ionosphere at high latitudes, with particular regard to the value of the O + -O collision parameter. The European incoherent scatter radar (EISCAT) was used to make tristatic measurements of plasma parameters at F-region altitudes while simultaneous measurements of the neutral wind were made by a Fabry-Perot interferometer (FPI). The radar data were used to derive the meridional neutral winds in a way similar to that used by previous authors. The accuracy of this technique at high latitudes is reduced by the dynamic nature of the auroral ionosphere and the presence of significant vertical winds. The derived winds were compared with the meridional winds measured by the FPI. For each night, the value of the O + -O collision parameter which produced the best agreement between the two data sets was found. The precision of the collision frequency found in this way depends on the accuracy of the data. The statistical method was critically examined in an attempt to account for the variability in the data sets. This study revealed that systematic errors in the data, if unaccounted for by the analysis, have a tendency to increase the value of the derived collision frequency. Previous analyses did not weight each data set in order to account for the quality of the data; an improved method of analysis is suggested. Article in Journal/Newspaper EISCAT Directory of Open Access Journals: DOAJ Articles Annales Geophysicae 13 5 541 550 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 C. J. Davis A. D. Farmer A. Aruliah An optimised method for calculating the O + -O collision parameter from aeronomical measurements |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
A study has been made of the interaction between the thermosphere and the ionosphere at high latitudes, with particular regard to the value of the O + -O collision parameter. The European incoherent scatter radar (EISCAT) was used to make tristatic measurements of plasma parameters at F-region altitudes while simultaneous measurements of the neutral wind were made by a Fabry-Perot interferometer (FPI). The radar data were used to derive the meridional neutral winds in a way similar to that used by previous authors. The accuracy of this technique at high latitudes is reduced by the dynamic nature of the auroral ionosphere and the presence of significant vertical winds. The derived winds were compared with the meridional winds measured by the FPI. For each night, the value of the O + -O collision parameter which produced the best agreement between the two data sets was found. The precision of the collision frequency found in this way depends on the accuracy of the data. The statistical method was critically examined in an attempt to account for the variability in the data sets. This study revealed that systematic errors in the data, if unaccounted for by the analysis, have a tendency to increase the value of the derived collision frequency. Previous analyses did not weight each data set in order to account for the quality of the data; an improved method of analysis is suggested. |
format |
Article in Journal/Newspaper |
author |
C. J. Davis A. D. Farmer A. Aruliah |
author_facet |
C. J. Davis A. D. Farmer A. Aruliah |
author_sort |
C. J. Davis |
title |
An optimised method for calculating the O + -O collision parameter from aeronomical measurements |
title_short |
An optimised method for calculating the O + -O collision parameter from aeronomical measurements |
title_full |
An optimised method for calculating the O + -O collision parameter from aeronomical measurements |
title_fullStr |
An optimised method for calculating the O + -O collision parameter from aeronomical measurements |
title_full_unstemmed |
An optimised method for calculating the O + -O collision parameter from aeronomical measurements |
title_sort |
optimised method for calculating the o + -o collision parameter from aeronomical measurements |
publisher |
Copernicus Publications |
publishDate |
1995 |
url |
https://doi.org/10.1007/s00585-995-0541-x https://doaj.org/article/c33c0305a9c447c9bcb15d25ca3122bf |
genre |
EISCAT |
genre_facet |
EISCAT |
op_source |
Annales Geophysicae, Vol 13, Pp 541-550 (1995) |
op_relation |
https://www.ann-geophys.net/13/541/1995/angeo-13-541-1995.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.1007/s00585-995-0541-x 0992-7689 1432-0576 https://doaj.org/article/c33c0305a9c447c9bcb15d25ca3122bf |
op_doi |
https://doi.org/10.1007/s00585-995-0541-x |
container_title |
Annales Geophysicae |
container_volume |
13 |
container_issue |
5 |
container_start_page |
541 |
op_container_end_page |
550 |
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1766400408009310208 |