Academic Journal
The use of the empirical mode decomposition for the identification of mean field aligned reference frames
| العنوان: | The use of the empirical mode decomposition for the identification of mean field aligned reference frames |
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| المؤلفون: | Mauro Regi, Alfredo Del Corpo, Marcello De Lauretis |
| المصدر: | Annals of Geophysics, Vol 59, Iss 6 (2017) |
| بيانات النشر: | Istituto Nazionale di Geofisica e Vulcanologia (INGV), 2017. |
| سنة النشر: | 2017 |
| المجموعة: | LCC:Meteorology. Climatology LCC:Geophysics. Cosmic physics |
| مصطلحات موضوعية: | Mean field aligned reference frame, Empirical mode decomposition, Moving-average, Time-series analysis, Meteorology. Climatology, QC851-999, Geophysics. Cosmic physics, QC801-809 |
| الوصف: | 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). |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1593-5213 2037-416X |
| Relation: | http://www.annalsofgeophysics.eu/index.php/annals/article/view/7067; https://doaj.org/toc/1593-5213; https://doaj.org/toc/2037-416X |
| DOI: | 10.4401/ag-7067 |
| URL الوصول: | https://doaj.org/article/4375166a0afc40c1a852a3a37e6f905b |
| رقم الانضمام: | edsdoj.4375166a0afc40c1a852a3a37e6f905b |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 15935213 2037416X |
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| DOI: | 10.4401/ag-7067 |