Difference spectrum fitting of the ion–neutral collision frequency from dual-frequency EISCAT measurements
The plasma–neutral coupling in the mesosphere–lower thermosphere strongly depends on the ion–neutral collision frequency across that region. Most commonly, the collision frequency profile is calculated from the climatologies of atmospheric models. However, previous measurements indicated that the co...
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ftdoajarticles:oai:doaj.org/article:0a9d3e9598154cec8be25b02d8d61608 2024-01-07T09:42:59+01:00 Difference spectrum fitting of the ion–neutral collision frequency from dual-frequency EISCAT measurements F. Günzkofer G. Stober D. Pokhotelov Y. Miyoshi C. Borries 2023-12-01T00:00:00Z https://doi.org/10.5194/amt-16-5897-2023 https://doaj.org/article/0a9d3e9598154cec8be25b02d8d61608 EN eng Copernicus Publications https://amt.copernicus.org/articles/16/5897/2023/amt-16-5897-2023.pdf https://doaj.org/toc/1867-1381 https://doaj.org/toc/1867-8548 doi:10.5194/amt-16-5897-2023 1867-1381 1867-8548 https://doaj.org/article/0a9d3e9598154cec8be25b02d8d61608 Atmospheric Measurement Techniques, Vol 16, Pp 5897-5907 (2023) Environmental engineering TA170-171 Earthwork. Foundations TA715-787 article 2023 ftdoajarticles https://doi.org/10.5194/amt-16-5897-2023 2023-12-10T01:37:44Z The plasma–neutral coupling in the mesosphere–lower thermosphere strongly depends on the ion–neutral collision frequency across that region. Most commonly, the collision frequency profile is calculated from the climatologies of atmospheric models. However, previous measurements indicated that the collision frequency can deviate notably from the climatological average. Direct measurement of the ion–neutral collision frequency with multifrequency incoherent scatter radar (ISR) measurements has been discussed before, though actual measurements have been rare. The previously applied multifrequency analysis method requires a special simultaneous fit of the two incoherent scatter spectra, which is not possible with standard ISR analysis software. The difference spectrum method allows us to infer ion–neutral collision frequency profiles from multifrequency ISR measurements based on standard incoherent scatter analysis software, such as the Grand Unified Incoherent Scatter Design and Analysis Package (GUISDAP) software. In this work, we present the first results by applying the difference spectrum method. Ion–neutral collision frequency profiles obtained from several multifrequency EISCAT ISR campaigns are presented. The profiles obtained with the difference spectrum method are compared to previous collision frequency measurements, both from multifrequency ISR and other measurements, as well as results from empirical and comprehensive atmosphere models. Ion–neutral collision frequency measurements can be applied to improve first-principle ionospheric models. Article in Journal/Newspaper EISCAT Directory of Open Access Journals: DOAJ Articles Atmospheric Measurement Techniques 16 23 5897 5907 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental engineering TA170-171 Earthwork. Foundations TA715-787 |
spellingShingle |
Environmental engineering TA170-171 Earthwork. Foundations TA715-787 F. Günzkofer G. Stober D. Pokhotelov Y. Miyoshi C. Borries Difference spectrum fitting of the ion–neutral collision frequency from dual-frequency EISCAT measurements |
topic_facet |
Environmental engineering TA170-171 Earthwork. Foundations TA715-787 |
description |
The plasma–neutral coupling in the mesosphere–lower thermosphere strongly depends on the ion–neutral collision frequency across that region. Most commonly, the collision frequency profile is calculated from the climatologies of atmospheric models. However, previous measurements indicated that the collision frequency can deviate notably from the climatological average. Direct measurement of the ion–neutral collision frequency with multifrequency incoherent scatter radar (ISR) measurements has been discussed before, though actual measurements have been rare. The previously applied multifrequency analysis method requires a special simultaneous fit of the two incoherent scatter spectra, which is not possible with standard ISR analysis software. The difference spectrum method allows us to infer ion–neutral collision frequency profiles from multifrequency ISR measurements based on standard incoherent scatter analysis software, such as the Grand Unified Incoherent Scatter Design and Analysis Package (GUISDAP) software. In this work, we present the first results by applying the difference spectrum method. Ion–neutral collision frequency profiles obtained from several multifrequency EISCAT ISR campaigns are presented. The profiles obtained with the difference spectrum method are compared to previous collision frequency measurements, both from multifrequency ISR and other measurements, as well as results from empirical and comprehensive atmosphere models. Ion–neutral collision frequency measurements can be applied to improve first-principle ionospheric models. |
format |
Article in Journal/Newspaper |
author |
F. Günzkofer G. Stober D. Pokhotelov Y. Miyoshi C. Borries |
author_facet |
F. Günzkofer G. Stober D. Pokhotelov Y. Miyoshi C. Borries |
author_sort |
F. Günzkofer |
title |
Difference spectrum fitting of the ion–neutral collision frequency from dual-frequency EISCAT measurements |
title_short |
Difference spectrum fitting of the ion–neutral collision frequency from dual-frequency EISCAT measurements |
title_full |
Difference spectrum fitting of the ion–neutral collision frequency from dual-frequency EISCAT measurements |
title_fullStr |
Difference spectrum fitting of the ion–neutral collision frequency from dual-frequency EISCAT measurements |
title_full_unstemmed |
Difference spectrum fitting of the ion–neutral collision frequency from dual-frequency EISCAT measurements |
title_sort |
difference spectrum fitting of the ion–neutral collision frequency from dual-frequency eiscat measurements |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/amt-16-5897-2023 https://doaj.org/article/0a9d3e9598154cec8be25b02d8d61608 |
genre |
EISCAT |
genre_facet |
EISCAT |
op_source |
Atmospheric Measurement Techniques, Vol 16, Pp 5897-5907 (2023) |
op_relation |
https://amt.copernicus.org/articles/16/5897/2023/amt-16-5897-2023.pdf https://doaj.org/toc/1867-1381 https://doaj.org/toc/1867-8548 doi:10.5194/amt-16-5897-2023 1867-1381 1867-8548 https://doaj.org/article/0a9d3e9598154cec8be25b02d8d61608 |
op_doi |
https://doi.org/10.5194/amt-16-5897-2023 |
container_title |
Atmospheric Measurement Techniques |
container_volume |
16 |
container_issue |
23 |
container_start_page |
5897 |
op_container_end_page |
5907 |
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1787424233451683840 |