Time-frequency tools of signal processing for EISCAT data analysis
International audience We demonstrate the usefulness of some signal-processing tools for the EISCAT data analysis. These tools are somewhat less classical than the familiar periodogram, squared modulus of the Fourier transform, and therefore not as commonly used in our community. The first is a stat...
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ftccsdartic:oai:HAL:hal-00329066v1 2023-05-15T16:04:15+02:00 Time-frequency tools of signal processing for EISCAT data analysis Lilensten, J. Amblard, Pierre-Olivier Centre d'Études des Phénomènes Aléatoires et Géophysiques (CEPHAG) École Nationale Supérieure d'Ingénieurs Électriciens de Grenoble (ENSIEG)-Centre National de la Recherche Scientifique (CNRS) 1996 https://hal.archives-ouvertes.fr/hal-00329066 https://hal.archives-ouvertes.fr/hal-00329066/document https://hal.archives-ouvertes.fr/hal-00329066/file/angeo-14-1513-1996.pdf en eng HAL CCSD European Geosciences Union hal-00329066 https://hal.archives-ouvertes.fr/hal-00329066 https://hal.archives-ouvertes.fr/hal-00329066/document https://hal.archives-ouvertes.fr/hal-00329066/file/angeo-14-1513-1996.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.archives-ouvertes.fr/hal-00329066 Annales Geophysicae, European Geosciences Union, 1996, 14 (12), pp.1513-1525 [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 1996 ftccsdartic 2021-07-31T23:34:55Z International audience We demonstrate the usefulness of some signal-processing tools for the EISCAT data analysis. These tools are somewhat less classical than the familiar periodogram, squared modulus of the Fourier transform, and therefore not as commonly used in our community. The first is a stationary analysis, "Thomson's estimate'' of the power spectrum. The other two belong to time-frequency analysis: the short-time Fourier transform with the spectrogram, and the wavelet analysis via the scalogram. Because of the highly non-stationary character of our geophysical signals, the latter two tools are better suited for this analysis. Their results are compared with both a synthetic signal and EISCAT ion-velocity measurements. We show that they help to discriminate patterns such as gravity waves from noise. Article in Journal/Newspaper EISCAT Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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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 Lilensten, J. Amblard, Pierre-Olivier Time-frequency tools of signal processing for EISCAT data analysis |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience We demonstrate the usefulness of some signal-processing tools for the EISCAT data analysis. These tools are somewhat less classical than the familiar periodogram, squared modulus of the Fourier transform, and therefore not as commonly used in our community. The first is a stationary analysis, "Thomson's estimate'' of the power spectrum. The other two belong to time-frequency analysis: the short-time Fourier transform with the spectrogram, and the wavelet analysis via the scalogram. Because of the highly non-stationary character of our geophysical signals, the latter two tools are better suited for this analysis. Their results are compared with both a synthetic signal and EISCAT ion-velocity measurements. We show that they help to discriminate patterns such as gravity waves from noise. |
author2 |
Centre d'Études des Phénomènes Aléatoires et Géophysiques (CEPHAG) École Nationale Supérieure d'Ingénieurs Électriciens de Grenoble (ENSIEG)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Lilensten, J. Amblard, Pierre-Olivier |
author_facet |
Lilensten, J. Amblard, Pierre-Olivier |
author_sort |
Lilensten, J. |
title |
Time-frequency tools of signal processing for EISCAT data analysis |
title_short |
Time-frequency tools of signal processing for EISCAT data analysis |
title_full |
Time-frequency tools of signal processing for EISCAT data analysis |
title_fullStr |
Time-frequency tools of signal processing for EISCAT data analysis |
title_full_unstemmed |
Time-frequency tools of signal processing for EISCAT data analysis |
title_sort |
time-frequency tools of signal processing for eiscat data analysis |
publisher |
HAL CCSD |
publishDate |
1996 |
url |
https://hal.archives-ouvertes.fr/hal-00329066 https://hal.archives-ouvertes.fr/hal-00329066/document https://hal.archives-ouvertes.fr/hal-00329066/file/angeo-14-1513-1996.pdf |
genre |
EISCAT |
genre_facet |
EISCAT |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.archives-ouvertes.fr/hal-00329066 Annales Geophysicae, European Geosciences Union, 1996, 14 (12), pp.1513-1525 |
op_relation |
hal-00329066 https://hal.archives-ouvertes.fr/hal-00329066 https://hal.archives-ouvertes.fr/hal-00329066/document https://hal.archives-ouvertes.fr/hal-00329066/file/angeo-14-1513-1996.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766399960394235904 |