The use of the empirical mode decomposition for the identification of mean field aligned reference frames
The magnetic field satellite data are usually referred to geocentric coordinate reference frame. Conversely, the magnetohydrodynamic waves modes in magnetized plasma depend on the ambient magnetic field, and is then useful to rotate the magnetic field measurements into the mean field aligned (MFA) c...
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Istituto Nazionale di Geofisica e Vulcanologia (INGV)
2017-01-01
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| Series: | Annals of Geophysics |
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| Online Access: | http://www.annalsofgeophysics.eu/index.php/annals/article/view/7067 |
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doaj-4375166a0afc40c1a852a3a37e6f905b2020-11-24T21:06:31ZengIstituto Nazionale di Geofisica e Vulcanologia (INGV)Annals of Geophysics1593-52132037-416X2017-01-0159610.4401/ag-70676193The use of the empirical mode decomposition for the identification of mean field aligned reference framesMauro Regi0Alfredo Del Corpo1Marcello De Lauretis2Università dell’Aquila, Dipartimento di Scienze Fisiche e Chimiche, L’Aquila, ItalyUniversità dell’Aquila, Dipartimento di Scienze Fisiche e Chimiche, L’Aquila, ItalyUniversità dell’Aquila, Dipartimento di Scienze Fisiche e Chimiche, L’Aquila, ItalyThe magnetic field satellite data are usually referred to geocentric coordinate reference frame. Conversely, the magnetohydrodynamic waves modes in magnetized plasma depend on the ambient magnetic field, and is then useful to rotate the magnetic field measurements into the mean field aligned (MFA) coordinate system. This reference frame is useful to study the ultra low frequency magnetic field variations along the direction of the mean field and perpendicularly to it. In order to identify the mean magnetic field the classical moving average (MAVG) approach is usually adopted but, under particular conditions, this procedure induces undesired features, such as spectral alteration in the rotated components. We discuss these aspects promoting an alternative and more efficient method for mean field aligned projection, based on the empirical mode decomposition (EMD).http://www.annalsofgeophysics.eu/index.php/annals/article/view/7067Mean field aligned reference frameEmpirical mode decompositionMoving-averageTime-series analysis |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Mauro Regi Alfredo Del Corpo Marcello De Lauretis |
| spellingShingle |
Mauro Regi Alfredo Del Corpo Marcello De Lauretis The use of the empirical mode decomposition for the identification of mean field aligned reference frames Annals of Geophysics Mean field aligned reference frame Empirical mode decomposition Moving-average Time-series analysis |
| author_facet |
Mauro Regi Alfredo Del Corpo Marcello De Lauretis |
| author_sort |
Mauro Regi |
| title |
The use of the empirical mode decomposition for the identification of mean field aligned reference frames |
| title_short |
The use of the empirical mode decomposition for the identification of mean field aligned reference frames |
| title_full |
The use of the empirical mode decomposition for the identification of mean field aligned reference frames |
| title_fullStr |
The use of the empirical mode decomposition for the identification of mean field aligned reference frames |
| title_full_unstemmed |
The use of the empirical mode decomposition for the identification of mean field aligned reference frames |
| title_sort |
use of the empirical mode decomposition for the identification of mean field aligned reference frames |
| publisher |
Istituto Nazionale di Geofisica e Vulcanologia (INGV) |
| series |
Annals of Geophysics |
| issn |
1593-5213 2037-416X |
| publishDate |
2017-01-01 |
| description |
The magnetic field satellite data are usually referred to geocentric coordinate reference frame. Conversely, the magnetohydrodynamic waves modes in magnetized plasma depend on the ambient magnetic field, and is then useful to rotate the magnetic field measurements into the mean field aligned (MFA) coordinate system. This reference frame is useful to study the ultra low frequency magnetic field variations along the direction of the mean field and perpendicularly to it. In order to identify the mean magnetic field the classical moving average (MAVG) approach is usually adopted but, under particular conditions, this procedure induces undesired features, such as spectral alteration in the rotated components. We discuss these aspects promoting an alternative and more efficient method for mean field aligned projection, based on the empirical mode decomposition (EMD). |
| topic |
Mean field aligned reference frame Empirical mode decomposition Moving-average Time-series analysis |
| url |
http://www.annalsofgeophysics.eu/index.php/annals/article/view/7067 |
| work_keys_str_mv |
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1716765724690612224 |