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| Titel |
Improved analysis of all-sky meteor radar measurements of gravity wave variances and momentum fluxes |
| VerfasserIn |
V. F. Andrioli, D. C. Fritts, P. P. Batista, B. R. Clemesha |
| 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 ; 31, no. 5 ; Nr. 31, no. 5 (2013-05-23), S.889-908 |
| Datensatznummer |
250019041
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| Publikation (Nr.) |
 copernicus.org/angeo-31-889-2013.pdf |
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| Zusammenfassung |
| The advantages of using a composite day analysis for all-sky interferometric
meteor radars when measuring mean winds and tides are widely known. On the
other hand, problems arise if this technique is applied to Hocking's (2005)
gravity wave analysis for all-sky meteor radars. In this paper we describe
how a simple change in the procedure makes it possible to use a composite
day in Hocking's analysis. Also, we explain how a modified composite day can
be constructed to test its ability to measure gravity wave momentum fluxes.
Test results for specified mean, tidal, and gravity wave fields, including
tidal amplitudes and gravity wave momentum fluxes varying strongly with
altitude and/or time, suggest that the modified composite day allows
characterization of monthly mean profiles of the gravity wave momentum
fluxes, with good accuracy at least at the altitudes where the meteor counts
are large (from 89 to 92.5 km). In the present work we also show that the
variances measured with Hocking's method are often contaminated by the tidal
fields and suggest a method of empirical correction derived from a simple
simulation model. The results presented here greatly increase our confidence because
they show that our technique is able to remove the tide-induced false
variances from Hocking's analysis. |
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