Aspect sensitivity of polar mesosphere summer echoes based on ESRAD MST radar measurements in Kiruna, Sweden in 1997–2010
Aspect sensitivities of polar mesosphere summer echoes (PMSE) measured with the ESRAD 50 MHz radar in 1997–2010 are studied using the full correlation analysis technique. Half of PMSE detected each year are found to be highly aspect sensitive. Yearly median values of the aspect sensitivity parameter...
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ftdoajarticles:oai:doaj.org/article:fc4ee7c75062444cb2059fabece75a26 2023-05-15T17:04:15+02:00 Aspect sensitivity of polar mesosphere summer echoes based on ESRAD MST radar measurements in Kiruna, Sweden in 1997–2010 M. Smirnova E. Belova S. Kirkwood 2012-03-01T00:00:00Z https://doi.org/10.5194/angeo-30-457-2012 https://doaj.org/article/fc4ee7c75062444cb2059fabece75a26 EN eng Copernicus Publications https://www.ann-geophys.net/30/457/2012/angeo-30-457-2012.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-30-457-2012 0992-7689 1432-0576 https://doaj.org/article/fc4ee7c75062444cb2059fabece75a26 Annales Geophysicae, Vol 30, Pp 457-465 (2012) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2012 ftdoajarticles https://doi.org/10.5194/angeo-30-457-2012 2022-12-31T03:16:13Z Aspect sensitivities of polar mesosphere summer echoes (PMSE) measured with the ESRAD 50 MHz radar in 1997–2010 are studied using the full correlation analysis technique. Half of PMSE detected each year are found to be highly aspect sensitive. Yearly median values of the aspect sensitivity parameter θ s , characterising the half-width of the scatterers' polar diagram, are 2.9–3.7° depending on the year. The other half of the PMSE have θ s values larger than 9–11° and cannot be evaluated using the ESRAD vertical beam only. PMSE aspect sensitivity reveals an altitude dependence, namely, the scatter becomes more isotropic with increasing height. This result is consistent with that reported in other studies. No dependence of PMSE aspect sensitivity on backscattered power for any year was identified. In the paper the limitations of the in-beam and off-vertical beam methods for estimation of PMSE aspect sensitivity are discussed. We conclude that both methods should be combined in order to get complete information about PMSE aspect sensitivity and to estimate correctly PMSE absolute strength. Article in Journal/Newspaper Kiruna Directory of Open Access Journals: DOAJ Articles Kiruna Annales Geophysicae 30 3 457 465 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
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Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 M. Smirnova E. Belova S. Kirkwood Aspect sensitivity of polar mesosphere summer echoes based on ESRAD MST radar measurements in Kiruna, Sweden in 1997–2010 |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
Aspect sensitivities of polar mesosphere summer echoes (PMSE) measured with the ESRAD 50 MHz radar in 1997–2010 are studied using the full correlation analysis technique. Half of PMSE detected each year are found to be highly aspect sensitive. Yearly median values of the aspect sensitivity parameter θ s , characterising the half-width of the scatterers' polar diagram, are 2.9–3.7° depending on the year. The other half of the PMSE have θ s values larger than 9–11° and cannot be evaluated using the ESRAD vertical beam only. PMSE aspect sensitivity reveals an altitude dependence, namely, the scatter becomes more isotropic with increasing height. This result is consistent with that reported in other studies. No dependence of PMSE aspect sensitivity on backscattered power for any year was identified. In the paper the limitations of the in-beam and off-vertical beam methods for estimation of PMSE aspect sensitivity are discussed. We conclude that both methods should be combined in order to get complete information about PMSE aspect sensitivity and to estimate correctly PMSE absolute strength. |
format |
Article in Journal/Newspaper |
author |
M. Smirnova E. Belova S. Kirkwood |
author_facet |
M. Smirnova E. Belova S. Kirkwood |
author_sort |
M. Smirnova |
title |
Aspect sensitivity of polar mesosphere summer echoes based on ESRAD MST radar measurements in Kiruna, Sweden in 1997–2010 |
title_short |
Aspect sensitivity of polar mesosphere summer echoes based on ESRAD MST radar measurements in Kiruna, Sweden in 1997–2010 |
title_full |
Aspect sensitivity of polar mesosphere summer echoes based on ESRAD MST radar measurements in Kiruna, Sweden in 1997–2010 |
title_fullStr |
Aspect sensitivity of polar mesosphere summer echoes based on ESRAD MST radar measurements in Kiruna, Sweden in 1997–2010 |
title_full_unstemmed |
Aspect sensitivity of polar mesosphere summer echoes based on ESRAD MST radar measurements in Kiruna, Sweden in 1997–2010 |
title_sort |
aspect sensitivity of polar mesosphere summer echoes based on esrad mst radar measurements in kiruna, sweden in 1997–2010 |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/angeo-30-457-2012 https://doaj.org/article/fc4ee7c75062444cb2059fabece75a26 |
geographic |
Kiruna |
geographic_facet |
Kiruna |
genre |
Kiruna |
genre_facet |
Kiruna |
op_source |
Annales Geophysicae, Vol 30, Pp 457-465 (2012) |
op_relation |
https://www.ann-geophys.net/30/457/2012/angeo-30-457-2012.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-30-457-2012 0992-7689 1432-0576 https://doaj.org/article/fc4ee7c75062444cb2059fabece75a26 |
op_doi |
https://doi.org/10.5194/angeo-30-457-2012 |
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Annales Geophysicae |
container_volume |
30 |
container_issue |
3 |
container_start_page |
457 |
op_container_end_page |
465 |
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1766058306830336000 |