EISCAT measurements of solar wind velocity and the associated level of interplanetary scintillation
A relative scintillation index can be derived from EISCAT observations of Interplanetary Scintillation (IPS) usually used to study the solar wind velocity. This provides an ideal opportunity to compare reliable measurements of the solar wind velocity derived for a number of points along the line-of-...
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Online Access: | https://doi.org/10.5194/angeo-20-1279-2002 https://angeo.copernicus.org/articles/20/1279/2002/ |
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ftcopernicus:oai:publications.copernicus.org:angeo34982 2023-05-15T16:04:28+02:00 EISCAT measurements of solar wind velocity and the associated level of interplanetary scintillation Fallows, R. A. Williams, P. J. S. Breen, A. R. 2018-09-27 application/pdf https://doi.org/10.5194/angeo-20-1279-2002 https://angeo.copernicus.org/articles/20/1279/2002/ eng eng doi:10.5194/angeo-20-1279-2002 https://angeo.copernicus.org/articles/20/1279/2002/ eISSN: 1432-0576 Text 2018 ftcopernicus https://doi.org/10.5194/angeo-20-1279-2002 2020-07-20T16:27:49Z A relative scintillation index can be derived from EISCAT observations of Interplanetary Scintillation (IPS) usually used to study the solar wind velocity. This provides an ideal opportunity to compare reliable measurements of the solar wind velocity derived for a number of points along the line-of-sight with measurements of the overall level of scintillation. By selecting those occasions where either slow- or fast-stream scattering was dominant, it is shown that at distances from the Sun greater than 30 R S , in both cases the scintillation index fell with increasing distance as a simple power law, typically as R -1.7 . The level of scintillation for slow-stream scattering is found to be 2.3 times the level for fast-stream scattering. Key words. Interplanetary physics (solar wind plasma) Text EISCAT Copernicus Publications: E-Journals Annales Geophysicae 20 9 1279 1289 |
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Open Polar |
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Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
A relative scintillation index can be derived from EISCAT observations of Interplanetary Scintillation (IPS) usually used to study the solar wind velocity. This provides an ideal opportunity to compare reliable measurements of the solar wind velocity derived for a number of points along the line-of-sight with measurements of the overall level of scintillation. By selecting those occasions where either slow- or fast-stream scattering was dominant, it is shown that at distances from the Sun greater than 30 R S , in both cases the scintillation index fell with increasing distance as a simple power law, typically as R -1.7 . The level of scintillation for slow-stream scattering is found to be 2.3 times the level for fast-stream scattering. Key words. Interplanetary physics (solar wind plasma) |
format |
Text |
author |
Fallows, R. A. Williams, P. J. S. Breen, A. R. |
spellingShingle |
Fallows, R. A. Williams, P. J. S. Breen, A. R. EISCAT measurements of solar wind velocity and the associated level of interplanetary scintillation |
author_facet |
Fallows, R. A. Williams, P. J. S. Breen, A. R. |
author_sort |
Fallows, R. A. |
title |
EISCAT measurements of solar wind velocity and the associated level of interplanetary scintillation |
title_short |
EISCAT measurements of solar wind velocity and the associated level of interplanetary scintillation |
title_full |
EISCAT measurements of solar wind velocity and the associated level of interplanetary scintillation |
title_fullStr |
EISCAT measurements of solar wind velocity and the associated level of interplanetary scintillation |
title_full_unstemmed |
EISCAT measurements of solar wind velocity and the associated level of interplanetary scintillation |
title_sort |
eiscat measurements of solar wind velocity and the associated level of interplanetary scintillation |
publishDate |
2018 |
url |
https://doi.org/10.5194/angeo-20-1279-2002 https://angeo.copernicus.org/articles/20/1279/2002/ |
genre |
EISCAT |
genre_facet |
EISCAT |
op_source |
eISSN: 1432-0576 |
op_relation |
doi:10.5194/angeo-20-1279-2002 https://angeo.copernicus.org/articles/20/1279/2002/ |
op_doi |
https://doi.org/10.5194/angeo-20-1279-2002 |
container_title |
Annales Geophysicae |
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20 |
container_issue |
9 |
container_start_page |
1279 |
op_container_end_page |
1289 |
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1766400057240715264 |