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| Titel |
Wavelet analysis of solar decimeter spikes |
| VerfasserIn |
F. C. R. Fernandes, M. J. A. Bolzan, R. R. Rosa, A. Prestes, J. R. Cecatto, H. S. Sawant |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250069239
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| Zusammenfassung |
| The Brazilian Solar Spectroscope (BSS), in operation at INPE, Brazil, have recorded a group
of radio spikes observed on June 24, 1999 (16:53 - 16: 56 UT), in the decimeter frequency
range of 1000-2500 MHz, with high temporal resolution of 100 ms and spectral resolution of
10 MHz. This event presents distinct clusters of spikes with intermittent behavior. The
spectral and temporal behaviors of the observed groups of spikes of radio were investigated,
applying wavelet techniques, which permits to determine the cadence of the clusters.
From the dynamic spectra, the following observational parameters were determined:
the total duration of the event and of each cluster, the total frequency band and
cluster bands, in the case of the harmonic structures. The wavelet analysis shows
an average periodicity of about 17 seconds (and harmonics) for the cadence of
intermittent clusters of spikes. The analysis also suggested a semi-harmonic frequency
ratio of 1:1.2. The same methodology of analysis is being applied to other selected
groups of spikes recorded by BSS. These results will be presented and discussed. |
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