Filtering algorithm of airborne Doppler lidar measurements for improved wind estimation

Takashi Misaka, Fábio K. Nakabayashi, Shigeru Obayashi, Hamaki Inokuchi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this paper, we describe a filtering algorithm for removing the error of wind velocity arises in airborne Doppler lidar measurements. The algorithm is based on the Kalman filter with a simplified Kalman gain, which assumes zero variance for correct wind velocity and infinite variance for incorrect wind velocity. The algorithm is applied to 17,487 seconds of airborne Doppler lidar measurements, where a sequence of measurements along the lidar's measurement range is obtained every one second. The reduction of incorrect wind velocity is evaluated at the distance where correct wind velocity exists at least 20-30% of the time out of all measurements. The average standard deviation of filtered wind velocity at the above mentioned distance results in 17.2% of the original value, which is similar magnitude to correct measurements.

Original languageEnglish
Pages (from-to)149-155
Number of pages7
JournalTransactions of the Japan Society for Aeronautical and Space Sciences
Volume58
Issue number3
DOIs
Publication statusPublished - 2015 Jan 1

Keywords

  • Airborne doppler lidar
  • Atmospheric turbulence
  • Filtering algorithm

ASJC Scopus subject areas

  • Aerospace Engineering
  • Space and Planetary Science

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