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| Titel |
Multitaper spectral analysis of atmospheric radar signals |
| VerfasserIn |
V. K. Anandan, C. J. Pan, T. Rajalakshmi, G. Ramachandra Reddy |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 22, no. 11 ; Nr. 22, no. 11 (2004-11-29), S.3995-4003 |
| Datensatznummer |
250015066
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| Publikation (Nr.) |
 copernicus.org/angeo-22-3995-2004.pdf |
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| Zusammenfassung |
| Multitaper spectral analysis using sinusoidal taper has been carried out on
the backscattered signals received from the troposphere and lower
stratosphere by the Gadanki Mesosphere-Stratosphere-Troposphere (MST) radar
under various conditions of the signal-to-noise ratio. Comparison of study is
made with sinusoidal taper of the order of three and single tapers of Hanning and
rectangular tapers, to understand the relative merits of processing under the
scheme. Power spectra plots show that echoes are better identified in the
case of multitaper estimation, especially in the region of a weak
signal-to-noise ratio. Further analysis is carried out to obtain three lower order
moments from three estimation techniques. The results show that multitaper
analysis gives a better signal-to-noise ratio or higher detectability. The
spectral analysis through multitaper and single tapers is subjected to study
of consistency in measurements. Results show that the multitaper estimate is
better consistent in Doppler measurements compared to single taper
estimates. Doppler width measurements with different approaches were studied
and the results show that the estimation was better in the multitaper technique
in terms of temporal resolution and estimation accuracy. |
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