Alternating-code experiment for plasma-line studies
We present results of the first plasma-line measurement of the incoherent spectrum using the alternating-code technique with the EISCAT VHF radar. This technique, which has earlier mostly been used to measure high-resolution E-region ion-line spectra, turned out to be a very good alternative to othe...
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ftdoajarticles:oai:doaj.org/article:e0f79abc56e2497fac3bc5923eb86c36 2023-05-15T16:04:45+02:00 Alternating-code experiment for plasma-line studies P. Guio N. Bjørnå W. Kofman 1996-12-01T00:00:00Z https://doi.org/10.1007/s00585-996-1473-9 https://doaj.org/article/e0f79abc56e2497fac3bc5923eb86c36 EN eng Copernicus Publications https://www.ann-geophys.net/14/1473/1996/angeo-14-1473-1996.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.1007/s00585-996-1473-9 0992-7689 1432-0576 https://doaj.org/article/e0f79abc56e2497fac3bc5923eb86c36 Annales Geophysicae, Vol 14, Pp 1473-1479 (1996) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 1996 ftdoajarticles https://doi.org/10.1007/s00585-996-1473-9 2022-12-30T23:16:00Z We present results of the first plasma-line measurement of the incoherent spectrum using the alternating-code technique with the EISCAT VHF radar. This technique, which has earlier mostly been used to measure high-resolution E-region ion-line spectra, turned out to be a very good alternative to other techniques for plasma-line measurements. The experiment provides simultaneous measurement of the ion line and downshifted and upshifted plasma-line spectra with an altitude resolution of 3 km and a temporal resolution of 10 s. The measurements are taken around the peak of the F region, but not necessarily at the peak itself, as is the case with the long-pulse technique. The condition for success is that the scale height should be large enough such that the backscattered signal from the range extent of one gate falls inside the receiver filter. The data are analysed and the results are combined with the results of the ion-line data analysis to estimate electron mean drift velocity and thereafter electric currents along the line of sight of the radar using both the standard dispersion relation assuming a Maxwellian electron velocity distribution and the more recent model including a heat-flow correction term. Article in Journal/Newspaper EISCAT Directory of Open Access Journals: DOAJ Articles Annales Geophysicae 14 12 1473 1479 |
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 P. Guio N. Bjørnå W. Kofman Alternating-code experiment for plasma-line studies |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
We present results of the first plasma-line measurement of the incoherent spectrum using the alternating-code technique with the EISCAT VHF radar. This technique, which has earlier mostly been used to measure high-resolution E-region ion-line spectra, turned out to be a very good alternative to other techniques for plasma-line measurements. The experiment provides simultaneous measurement of the ion line and downshifted and upshifted plasma-line spectra with an altitude resolution of 3 km and a temporal resolution of 10 s. The measurements are taken around the peak of the F region, but not necessarily at the peak itself, as is the case with the long-pulse technique. The condition for success is that the scale height should be large enough such that the backscattered signal from the range extent of one gate falls inside the receiver filter. The data are analysed and the results are combined with the results of the ion-line data analysis to estimate electron mean drift velocity and thereafter electric currents along the line of sight of the radar using both the standard dispersion relation assuming a Maxwellian electron velocity distribution and the more recent model including a heat-flow correction term. |
format |
Article in Journal/Newspaper |
author |
P. Guio N. Bjørnå W. Kofman |
author_facet |
P. Guio N. Bjørnå W. Kofman |
author_sort |
P. Guio |
title |
Alternating-code experiment for plasma-line studies |
title_short |
Alternating-code experiment for plasma-line studies |
title_full |
Alternating-code experiment for plasma-line studies |
title_fullStr |
Alternating-code experiment for plasma-line studies |
title_full_unstemmed |
Alternating-code experiment for plasma-line studies |
title_sort |
alternating-code experiment for plasma-line studies |
publisher |
Copernicus Publications |
publishDate |
1996 |
url |
https://doi.org/10.1007/s00585-996-1473-9 https://doaj.org/article/e0f79abc56e2497fac3bc5923eb86c36 |
genre |
EISCAT |
genre_facet |
EISCAT |
op_source |
Annales Geophysicae, Vol 14, Pp 1473-1479 (1996) |
op_relation |
https://www.ann-geophys.net/14/1473/1996/angeo-14-1473-1996.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.1007/s00585-996-1473-9 0992-7689 1432-0576 https://doaj.org/article/e0f79abc56e2497fac3bc5923eb86c36 |
op_doi |
https://doi.org/10.1007/s00585-996-1473-9 |
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Annales Geophysicae |
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14 |
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12 |
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1473 |
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1479 |
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1766400372862091264 |