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...
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2020
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ftdoajarticles:oai:doaj.org/article:a1dbd6f011684c3c8d9a1dd5d18d5d04 2023-05-15T14:00:18+02:00 Probabilistic analysis of ambiguities in radar echo direction of arrival from meteors D. Kastinen J. Kero 2020-12-01T00:00:00Z https://doi.org/10.5194/amt-13-6813-2020 https://doaj.org/article/a1dbd6f011684c3c8d9a1dd5d18d5d04 EN eng Copernicus Publications https://amt.copernicus.org/articles/13/6813/2020/amt-13-6813-2020.pdf https://doaj.org/toc/1867-1381 https://doaj.org/toc/1867-8548 doi:10.5194/amt-13-6813-2020 1867-1381 1867-8548 https://doaj.org/article/a1dbd6f011684c3c8d9a1dd5d18d5d04 Atmospheric Measurement Techniques, Vol 13, Pp 6813-6835 (2020) Environmental engineering TA170-171 Earthwork. Foundations TA715-787 article 2020 ftdoajarticles https://doi.org/10.5194/amt-13-6813-2020 2022-12-31T06:00:24Z 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 2.5 λ 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 2.5 λ 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 Directory of Open Access Journals: DOAJ Articles Alomar ENVELOPE(-67.083,-67.083,-68.133,-68.133) Antarctic Norway The Antarctic Atmospheric Measurement Techniques 13 12 6813 6835 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental engineering TA170-171 Earthwork. Foundations TA715-787 |
spellingShingle |
Environmental engineering TA170-171 Earthwork. Foundations TA715-787 D. Kastinen J. Kero Probabilistic analysis of ambiguities in radar echo direction of arrival from meteors |
topic_facet |
Environmental engineering TA170-171 Earthwork. Foundations TA715-787 |
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 2.5 λ 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 2.5 λ 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 |
D. Kastinen J. Kero |
author_facet |
D. Kastinen J. Kero |
author_sort |
D. Kastinen |
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://doaj.org/article/a1dbd6f011684c3c8d9a1dd5d18d5d04 |
long_lat |
ENVELOPE(-67.083,-67.083,-68.133,-68.133) |
geographic |
Alomar Antarctic Norway The Antarctic |
geographic_facet |
Alomar Antarctic Norway The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Atmospheric Measurement Techniques, Vol 13, Pp 6813-6835 (2020) |
op_relation |
https://amt.copernicus.org/articles/13/6813/2020/amt-13-6813-2020.pdf https://doaj.org/toc/1867-1381 https://doaj.org/toc/1867-8548 doi:10.5194/amt-13-6813-2020 1867-1381 1867-8548 https://doaj.org/article/a1dbd6f011684c3c8d9a1dd5d18d5d04 |
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 |
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1766269339341684736 |