Probabilistic analysis of ambiguities in radar echo direction of arrival from meteors
Meteors and hard targets produce coherent radar echoes. If measured with an interferometric radar system, these echoes can be used to determine the position of the target through finding the direction of arrival (DOA) of the incoming echo onto the radar. Depending on the spatial configuration of rad...
Published in: | Atmospheric Measurement Techniques |
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Copernicus Publications
2020
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Online Access: | https://doi.org/10.5194/amt-13-6813-2020 https://noa.gwlb.de/receive/cop_mods_00055066 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054717/amt-13-6813-2020.pdf https://amt.copernicus.org/articles/13/6813/2020/amt-13-6813-2020.pdf |
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00055066 2024-09-15T17:42:40+00:00 Probabilistic analysis of ambiguities in radar echo direction of arrival from meteors Kastinen, Daniel Kero, Johan 2020-12 electronic https://doi.org/10.5194/amt-13-6813-2020 https://noa.gwlb.de/receive/cop_mods_00055066 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054717/amt-13-6813-2020.pdf https://amt.copernicus.org/articles/13/6813/2020/amt-13-6813-2020.pdf eng eng Copernicus Publications Atmospheric Measurement Techniques -- http://www.bibliothek.uni-regensburg.de/ezeit/?2505596 -- http://www.atmospheric-measurement-techniques.net/ -- 1867-8548 https://doi.org/10.5194/amt-13-6813-2020 https://noa.gwlb.de/receive/cop_mods_00055066 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054717/amt-13-6813-2020.pdf https://amt.copernicus.org/articles/13/6813/2020/amt-13-6813-2020.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2020 ftnonlinearchiv https://doi.org/10.5194/amt-13-6813-2020 2024-06-26T04:43:09Z Meteors and hard targets produce coherent radar echoes. If measured with an interferometric radar system, these echoes can be used to determine the position of the target through finding the direction of arrival (DOA) of the incoming echo onto the radar. Depending on the spatial configuration of radar-receiving antennas and their individual gain patterns, there may be an ambiguity problem when determining the DOA of an echo. Radars that are theoretically ambiguity-free are known to still have ambiguities that depend on the total radar signal-to-noise ratio (SNR). In this study, we investigate robust methods which are easy to implement to determine the effect of ambiguities on any hard target DOA determination by interferometric radar systems. We apply these methods specifically to simulate four different radar systems measuring meteor head and trail echoes, using the multiple signal classification (MUSIC) DOA determination algorithm. The four radar systems are the Middle And Upper Atmosphere (MU) radar in Japan, a generic Jones 2.5λ specular meteor trail radar configuration, the Middle Atmosphere Alomar Radar System (MAARSY) radar in Norway and the Program of the Antarctic Syowa Mesosphere Stratosphere Troposphere Incoherent Scatter (PANSY) radar in the Antarctic. We also examined a slightly perturbed Jones 2.5λ configuration used as a meteor trail echo receiver for the PANSY radar. All the results are derived from simulations, and their purpose is to grant understanding of the behaviour of DOA determination. General results are as follows: there may be a region of SNRs where ambiguities are relevant; Monte Carlo simulation determines this region and if it exists; the MUSIC function peak value is directly correlated with the ambiguous region; a Bayesian method is presented that may be able to analyse echoes from this region; the DOA of echoes with SNRs larger than this region are perfectly determined; the DOA of echoes with SNRs smaller than this region completely fail to be determined; the location of this ... Article in Journal/Newspaper Antarc* Antarctic Niedersächsisches Online-Archiv NOA Atmospheric Measurement Techniques 13 12 6813 6835 |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Kastinen, Daniel Kero, Johan Probabilistic analysis of ambiguities in radar echo direction of arrival from meteors |
topic_facet |
article Verlagsveröffentlichung |
description |
Meteors and hard targets produce coherent radar echoes. If measured with an interferometric radar system, these echoes can be used to determine the position of the target through finding the direction of arrival (DOA) of the incoming echo onto the radar. Depending on the spatial configuration of radar-receiving antennas and their individual gain patterns, there may be an ambiguity problem when determining the DOA of an echo. Radars that are theoretically ambiguity-free are known to still have ambiguities that depend on the total radar signal-to-noise ratio (SNR). In this study, we investigate robust methods which are easy to implement to determine the effect of ambiguities on any hard target DOA determination by interferometric radar systems. We apply these methods specifically to simulate four different radar systems measuring meteor head and trail echoes, using the multiple signal classification (MUSIC) DOA determination algorithm. The four radar systems are the Middle And Upper Atmosphere (MU) radar in Japan, a generic Jones 2.5λ specular meteor trail radar configuration, the Middle Atmosphere Alomar Radar System (MAARSY) radar in Norway and the Program of the Antarctic Syowa Mesosphere Stratosphere Troposphere Incoherent Scatter (PANSY) radar in the Antarctic. We also examined a slightly perturbed Jones 2.5λ configuration used as a meteor trail echo receiver for the PANSY radar. All the results are derived from simulations, and their purpose is to grant understanding of the behaviour of DOA determination. General results are as follows: there may be a region of SNRs where ambiguities are relevant; Monte Carlo simulation determines this region and if it exists; the MUSIC function peak value is directly correlated with the ambiguous region; a Bayesian method is presented that may be able to analyse echoes from this region; the DOA of echoes with SNRs larger than this region are perfectly determined; the DOA of echoes with SNRs smaller than this region completely fail to be determined; the location of this ... |
format |
Article in Journal/Newspaper |
author |
Kastinen, Daniel Kero, Johan |
author_facet |
Kastinen, Daniel Kero, Johan |
author_sort |
Kastinen, Daniel |
title |
Probabilistic analysis of ambiguities in radar echo direction of arrival from meteors |
title_short |
Probabilistic analysis of ambiguities in radar echo direction of arrival from meteors |
title_full |
Probabilistic analysis of ambiguities in radar echo direction of arrival from meteors |
title_fullStr |
Probabilistic analysis of ambiguities in radar echo direction of arrival from meteors |
title_full_unstemmed |
Probabilistic analysis of ambiguities in radar echo direction of arrival from meteors |
title_sort |
probabilistic analysis of ambiguities in radar echo direction of arrival from meteors |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/amt-13-6813-2020 https://noa.gwlb.de/receive/cop_mods_00055066 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054717/amt-13-6813-2020.pdf https://amt.copernicus.org/articles/13/6813/2020/amt-13-6813-2020.pdf |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
Atmospheric Measurement Techniques -- http://www.bibliothek.uni-regensburg.de/ezeit/?2505596 -- http://www.atmospheric-measurement-techniques.net/ -- 1867-8548 https://doi.org/10.5194/amt-13-6813-2020 https://noa.gwlb.de/receive/cop_mods_00055066 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054717/amt-13-6813-2020.pdf https://amt.copernicus.org/articles/13/6813/2020/amt-13-6813-2020.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/amt-13-6813-2020 |
container_title |
Atmospheric Measurement Techniques |
container_volume |
13 |
container_issue |
12 |
container_start_page |
6813 |
op_container_end_page |
6835 |
_version_ |
1810489312822689792 |