The iterative complex demodulation applied on short and long Schumann resonance measured sequences
The precise determination of instantaneous frequency of Schumann resonance (SR) modes, with the possibility of application to relatively short signal sequences, seems to be important for detailed analysis of SR modal frequency variations. Contrary to commonly used method of obtaining modal frequenci...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Earth Science Institute, Slovak Academy of Sciences, Slovakia
2014-12-01
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| Series: | Contributions to Geophysics and Geodesy |
| Subjects: | |
| Online Access: | https://journal.geo.sav.sk/cgg/article/view/120 |
| _version_ | 1819295429217484800 |
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| author | Adriena ONDRÁŠKOVÁ Sebastián ŠEVČÍK |
| author_facet | Adriena ONDRÁŠKOVÁ Sebastián ŠEVČÍK |
| author_sort | Adriena ONDRÁŠKOVÁ |
| collection | DOAJ |
| description | The precise determination of instantaneous frequency of Schumann resonance
(SR) modes, with the possibility of application to relatively short signal sequences, seems
to be important for detailed analysis of SR modal frequency variations. Contrary to commonly
used method of obtaining modal frequencies by the Lorentz function fitting of DFT
spectra, we employ the complex demodulation (CD) method in iterated form. Results of
iterated CD method applied on short and long measured sequences are compared. Results
for SR signals as well as the comparison with Lorentz function fitting are presented.
Decrease of frequencies of all first four SR modes from the solar cycle maximum to solar
cycle minimum has been found using also the CD method. |
| first_indexed | 2024-12-24T04:42:04Z |
| format | Article |
| id | doaj.art-6ecfa963cb5a4161b0eaa92466656f87 |
| institution | Directory Open Access Journal |
| issn | 1338-0540 |
| language | English |
| last_indexed | 2024-12-24T04:42:04Z |
| publishDate | 2014-12-01 |
| publisher | Earth Science Institute, Slovak Academy of Sciences, Slovakia |
| record_format | Article |
| series | Contributions to Geophysics and Geodesy |
| spelling | doaj.art-6ecfa963cb5a4161b0eaa92466656f872022-12-21T17:14:48ZengEarth Science Institute, Slovak Academy of Sciences, SlovakiaContributions to Geophysics and Geodesy1338-05402014-12-0144431332810.1515/congeo-2015-0008120The iterative complex demodulation applied on short and long Schumann resonance measured sequencesAdriena ONDRÁŠKOVÁ0Sebastián ŠEVČÍK1Faculty of Mathematics, Physics and Informatics Comenius University, Bratislava, Slovak RepublicFaculty of Mathematics, Physics and Informatics Comenius University, Bratislava, Slovak RepublicThe precise determination of instantaneous frequency of Schumann resonance (SR) modes, with the possibility of application to relatively short signal sequences, seems to be important for detailed analysis of SR modal frequency variations. Contrary to commonly used method of obtaining modal frequencies by the Lorentz function fitting of DFT spectra, we employ the complex demodulation (CD) method in iterated form. Results of iterated CD method applied on short and long measured sequences are compared. Results for SR signals as well as the comparison with Lorentz function fitting are presented. Decrease of frequencies of all first four SR modes from the solar cycle maximum to solar cycle minimum has been found using also the CD method.https://journal.geo.sav.sk/cgg/article/view/120schumann resonances, complex demodulation, instantaneous frequency |
| spellingShingle | Adriena ONDRÁŠKOVÁ Sebastián ŠEVČÍK The iterative complex demodulation applied on short and long Schumann resonance measured sequences Contributions to Geophysics and Geodesy schumann resonances, complex demodulation, instantaneous frequency |
| title | The iterative complex demodulation applied on short and long Schumann resonance measured sequences |
| title_full | The iterative complex demodulation applied on short and long Schumann resonance measured sequences |
| title_fullStr | The iterative complex demodulation applied on short and long Schumann resonance measured sequences |
| title_full_unstemmed | The iterative complex demodulation applied on short and long Schumann resonance measured sequences |
| title_short | The iterative complex demodulation applied on short and long Schumann resonance measured sequences |
| title_sort | iterative complex demodulation applied on short and long schumann resonance measured sequences |
| topic | schumann resonances, complex demodulation, instantaneous frequency |
| url | https://journal.geo.sav.sk/cgg/article/view/120 |
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