Articles | Volume 19, issue 8
Ann. Geophys., 19, 837–843, 2001

Special issue: MST

Ann. Geophys., 19, 837–843, 2001

  31 Aug 2001

31 Aug 2001

An improvement of wind velocity estimation from radar Doppler spectra in the upper mesosphere

S. Takeda1,*, T. Nakamura1, and T. Tsuda1 S. Takeda et al.
  • 1Radio Science Center for Space and Atmosphere, Kyoto University, Uji, Kyoto 611-0011, Japan
  • *Now at NTT DoCoMo, Inc.

Abstract. 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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