Aspect sensitivity measurements of polar mesosphere summer echoes using coherent radar imaging
International audience 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 a...
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ftccsdartic:oai:HAL:hal-00316938v1 2023-11-12T04:23:23+01:00 Aspect sensitivity measurements of polar mesosphere summer echoes using coherent radar imaging Chilson, P. B. Yu, T.-Y. Palmer, R. D. Kirkwood, S. Swedish Institute of Space Physics Kiruna (IRF) Department of Electrical Engineering and Center for Electro-Optics University of Nebraska System 2002 https://hal.science/hal-00316938 https://hal.science/hal-00316938/document https://hal.science/hal-00316938/file/angeo-20-213-2002.pdf en eng HAL CCSD European Geosciences Union hal-00316938 https://hal.science/hal-00316938 https://hal.science/hal-00316938/document https://hal.science/hal-00316938/file/angeo-20-213-2002.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00316938 Annales Geophysicae, 2002, 20 (2), pp.213-223 [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 2002 ftccsdartic 2023-10-21T23:07:59Z International audience 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. Article in Journal/Newspaper Northern Sweden Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Esrange ENVELOPE(21.117,21.117,67.883,67.883) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
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 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 |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience 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. |
author2 |
Swedish Institute of Space Physics Kiruna (IRF) Department of Electrical Engineering and Center for Electro-Optics University of Nebraska System |
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 |
HAL CCSD |
publishDate |
2002 |
url |
https://hal.science/hal-00316938 https://hal.science/hal-00316938/document https://hal.science/hal-00316938/file/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_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00316938 Annales Geophysicae, 2002, 20 (2), pp.213-223 |
op_relation |
hal-00316938 https://hal.science/hal-00316938 https://hal.science/hal-00316938/document https://hal.science/hal-00316938/file/angeo-20-213-2002.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782338176482803712 |