Aspect sensitivity measurements of polar mesosphere summer echoes using coherent radar imaging
The Esrange VHF radar (ESRAD), located in northern Sweden (67.88° N, 21.10° E), has been used to investigate polar mesosphere summer echoes (PMSE). During July and August of 1998, coherent radar imaging (CRI) was used to study the dynamic evolution of PMSE with high temporal and spatial resolution....
Published in: | Annales Geophysicae |
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2002
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Online Access: | https://doi.org/10.5194/angeo-20-213-2002 https://noa.gwlb.de/receive/cop_mods_00036096 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00036050/angeo-20-213-2002.pdf https://angeo.copernicus.org/articles/20/213/2002/angeo-20-213-2002.pdf |
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00036096 2023-05-15T17:44:48+02:00 Aspect sensitivity measurements of polar mesosphere summer echoes using coherent radar imaging Chilson, P. B. Yu, T.-Y. Palmer, R. D. Kirkwood, S. 2002-02 electronic https://doi.org/10.5194/angeo-20-213-2002 https://noa.gwlb.de/receive/cop_mods_00036096 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00036050/angeo-20-213-2002.pdf https://angeo.copernicus.org/articles/20/213/2002/angeo-20-213-2002.pdf eng eng Copernicus Publications Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-20-213-2002 https://noa.gwlb.de/receive/cop_mods_00036096 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00036050/angeo-20-213-2002.pdf https://angeo.copernicus.org/articles/20/213/2002/angeo-20-213-2002.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2002 ftnonlinearchiv https://doi.org/10.5194/angeo-20-213-2002 2022-02-08T22:44:09Z The Esrange VHF radar (ESRAD), located in northern Sweden (67.88° N, 21.10° E), has been used to investigate polar mesosphere summer echoes (PMSE). During July and August of 1998, coherent radar imaging (CRI) was used to study the dynamic evolution of PMSE with high temporal and spatial resolution. A CRI analysis provides an estimate of the angular brightness distribution within the radar’s probing volume. The brightness distribution is directly related to the radar reflectivity. Consequently, these data are used to investigate the aspect sensitivity of PMSE. In addition to the CRI analysis, the full correlation analysis (FCA) is used to derive estimates of the prevailing three-dimensional wind associated with the observed PMSE. It is shown that regions within the PMSE with enhanced aspect sensitivity have a correspondingly high signal-to-noise ratio (SNR). Although this relationship has been investigated in the past, the present study allows for an estimation of the aspect sensitivity independent of the assumed scattering models and avoids the complications of comparing echo strengths from vertical and off-vertical beams over large horizontal separations, as in the Doppler Beam Swinging (DBS) method. Regions of enhanced aspect sensitivity were additionally shown to correlate with the wave-perturbation induced downward motions of air parcels embedded in the PMSE. Key words. Ionosphere (polar ionosphere) Meteorology and Atmospheric Dynamics (middle atmosphere dynamics) Radio Science (Interferometry) Article in Journal/Newspaper Northern Sweden Niedersächsisches Online-Archiv NOA Esrange ENVELOPE(21.117,21.117,67.883,67.883) Annales Geophysicae 20 2 213 223 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Chilson, P. B. Yu, T.-Y. Palmer, R. D. Kirkwood, S. Aspect sensitivity measurements of polar mesosphere summer echoes using coherent radar imaging |
topic_facet |
article Verlagsveröffentlichung |
description |
The Esrange VHF radar (ESRAD), located in northern Sweden (67.88° N, 21.10° E), has been used to investigate polar mesosphere summer echoes (PMSE). During July and August of 1998, coherent radar imaging (CRI) was used to study the dynamic evolution of PMSE with high temporal and spatial resolution. A CRI analysis provides an estimate of the angular brightness distribution within the radar’s probing volume. The brightness distribution is directly related to the radar reflectivity. Consequently, these data are used to investigate the aspect sensitivity of PMSE. In addition to the CRI analysis, the full correlation analysis (FCA) is used to derive estimates of the prevailing three-dimensional wind associated with the observed PMSE. It is shown that regions within the PMSE with enhanced aspect sensitivity have a correspondingly high signal-to-noise ratio (SNR). Although this relationship has been investigated in the past, the present study allows for an estimation of the aspect sensitivity independent of the assumed scattering models and avoids the complications of comparing echo strengths from vertical and off-vertical beams over large horizontal separations, as in the Doppler Beam Swinging (DBS) method. Regions of enhanced aspect sensitivity were additionally shown to correlate with the wave-perturbation induced downward motions of air parcels embedded in the PMSE. Key words. Ionosphere (polar ionosphere) Meteorology and Atmospheric Dynamics (middle atmosphere dynamics) Radio Science (Interferometry) |
format |
Article in Journal/Newspaper |
author |
Chilson, P. B. Yu, T.-Y. Palmer, R. D. Kirkwood, S. |
author_facet |
Chilson, P. B. Yu, T.-Y. Palmer, R. D. Kirkwood, S. |
author_sort |
Chilson, P. B. |
title |
Aspect sensitivity measurements of polar mesosphere summer echoes using coherent radar imaging |
title_short |
Aspect sensitivity measurements of polar mesosphere summer echoes using coherent radar imaging |
title_full |
Aspect sensitivity measurements of polar mesosphere summer echoes using coherent radar imaging |
title_fullStr |
Aspect sensitivity measurements of polar mesosphere summer echoes using coherent radar imaging |
title_full_unstemmed |
Aspect sensitivity measurements of polar mesosphere summer echoes using coherent radar imaging |
title_sort |
aspect sensitivity measurements of polar mesosphere summer echoes using coherent radar imaging |
publisher |
Copernicus Publications |
publishDate |
2002 |
url |
https://doi.org/10.5194/angeo-20-213-2002 https://noa.gwlb.de/receive/cop_mods_00036096 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00036050/angeo-20-213-2002.pdf https://angeo.copernicus.org/articles/20/213/2002/angeo-20-213-2002.pdf |
long_lat |
ENVELOPE(21.117,21.117,67.883,67.883) |
geographic |
Esrange |
geographic_facet |
Esrange |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_relation |
Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-20-213-2002 https://noa.gwlb.de/receive/cop_mods_00036096 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00036050/angeo-20-213-2002.pdf https://angeo.copernicus.org/articles/20/213/2002/angeo-20-213-2002.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/angeo-20-213-2002 |
container_title |
Annales Geophysicae |
container_volume |
20 |
container_issue |
2 |
container_start_page |
213 |
op_container_end_page |
223 |
_version_ |
1766147082917249024 |