Alternating-code experiment for plasma-line studies
International audience 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 g...
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ftunivnantes:oai:HAL:hal-00329061v1 2023-05-15T16:04:45+02:00 Alternating-code experiment for plasma-line studies Guio, P. Bjørnå, N. Kofman, W. The Auroral Observatory University of Tromsø (UiT) Centre d'Études des Phénomènes Aléatoires et Géophysiques (CEPHAG) École Nationale Supérieure d'Ingénieurs Électriciens de Grenoble (ENSIEG)-Centre National de la Recherche Scientifique (CNRS) 1996 https://hal.science/hal-00329061 https://hal.science/hal-00329061/document https://hal.science/hal-00329061/file/angeo-14-1473-1996.pdf en eng HAL CCSD European Geosciences Union hal-00329061 https://hal.science/hal-00329061 https://hal.science/hal-00329061/document https://hal.science/hal-00329061/file/angeo-14-1473-1996.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00329061 Annales Geophysicae, 1996, 14 (12), pp.1473-1479 [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 1996 ftunivnantes 2023-02-08T04:20:08Z International audience 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 Université de Nantes: HAL-UNIV-NANTES |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
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 Guio, P. Bjørnå, N. Kofman, W. Alternating-code experiment for plasma-line studies |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience 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. |
author2 |
The Auroral Observatory University of Tromsø (UiT) Centre d'Études des Phénomènes Aléatoires et Géophysiques (CEPHAG) École Nationale Supérieure d'Ingénieurs Électriciens de Grenoble (ENSIEG)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Guio, P. Bjørnå, N. Kofman, W. |
author_facet |
Guio, P. Bjørnå, N. Kofman, W. |
author_sort |
Guio, P. |
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 |
HAL CCSD |
publishDate |
1996 |
url |
https://hal.science/hal-00329061 https://hal.science/hal-00329061/document https://hal.science/hal-00329061/file/angeo-14-1473-1996.pdf |
genre |
EISCAT |
genre_facet |
EISCAT |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00329061 Annales Geophysicae, 1996, 14 (12), pp.1473-1479 |
op_relation |
hal-00329061 https://hal.science/hal-00329061 https://hal.science/hal-00329061/document https://hal.science/hal-00329061/file/angeo-14-1473-1996.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766400373040349184 |