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| Titel |
An improvement of wind velocity estimation from radar Doppler spectra in the upper mesosphere |
| VerfasserIn |
S. Takeda, T. Nakamura, T. Tsuda |
| 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 ; 19, no. 8 ; Nr. 19, no. 8, S.837-843 |
| Datensatznummer |
250014294
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| Publikation (Nr.) |
 copernicus.org/angeo-19-837-2001.pdf |
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| Zusammenfassung |
We have developed a new
parameter estimation method for Doppler wind spectra in the mesosphere observed
with an MST radar such as the MU radar in the DBS (Doppler Beam Swinging) mode.
Off-line incoherent integration of the Doppler spectra is carried out with a
new algorithm excluding contamination by strong meteor echoes. At the same
time, initial values on a least square fitting of the Gaussian function are
derived using a larger number of integration of the spectra for a longer time
and for multiple heights. As a result, a significant improvement has been
achieved with the probability of a successful fitting and parameter estimation
above 80 km. The top height for the wind estimation has been improved to around
95 km. A comparison between the MU radar and the High Resolution Doppler Imager
(HRDI) on the UARS satellite is shown and the capability of the new method for
a validation of a future satellite mission is suggested.
Key words. Meteorology and
atmospheric dynamics (middle atmosphere dynamics) – Radio science (remote
sensing; signal processing) |
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