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Wavelet cleaning of solar dynamic radio spectrograms
Sych, RA; Yan, YH
AbstractBy applying the state-of-the-art mathematical apparatus, the wavelet transformation, we explore the possibility of a dynamic cleaning of raw data obtained with the Chinese solar radio spectrographs over a wide wavelength range (from 0.7 to 7.6 GHz). We consider the problem of eliminating the interference caused by combination rates of data sampling (10-20 ms), and the low-frequency interference (4-30 s) caused by the receiving equipment changing its characteristics with time. It is shown that the best choice to reconstruct a signal suffering from amplitude, frequency and phase instabilities, is by means of wavelet transformation at both high and low frequencies. We analysed observational data which contained interferences of nonsolar origin such as instrumental effects and other man-made signals. A subsequent comparison of the reference data obtained with the acousto-optical receiver of the Siberian Solar Radio Telescope (SSRT) with the "cleaned" spectra confirms the correctness of this approach.
KeywordSun : Radio Radiation Methods : Data Analysis
Indexed BySCI
WOS IDWOS:000175150900012
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Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Russian Acad Sci, Inst Solar Terr Phys, Irkutsk 664033, Russia
Recommended Citation
GB/T 7714
Sych, RA,Yan, YH. Wavelet cleaning of solar dynamic radio spectrograms[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2002,2(2):183-192.
APA Sych, RA,&Yan, YH.(2002).Wavelet cleaning of solar dynamic radio spectrograms.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2(2),183-192.
MLA Sych, RA,et al."Wavelet cleaning of solar dynamic radio spectrograms".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 2.2(2002):183-192.
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