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５巻１号 （2024年4月） Volume 5, Number 1 (April 2024) |
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Paper: Full-parameter performance simulation theory for velocity azimuth display pulsed coherent Doppler lidar, and error analysis on wind speed measurement in shear flow Shumpei Kameyama pp. 13-28 |
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Abstract Full-parameter performance simulation theory is shown for velocity azimuth display pulsed coherent Doppler lidar (VAD-PCDL). The parameters include not only VAD-PCDL parameters but also atmo- spheric ones. Influences of these parameters regarding range-dependent intensity of heterodyne-detected signal and digital signal processing are considered. The simulation theory can be applied for general wind field cases. Example analysis of wind speed measurement error is shown for the case of sheared wind flow. Some cases of the vertical wind profiles with shear are set for the input, and wind speed mea- surement using VAD scan is performed using the fast Fourier transform (FFT) based signal processing. Approach of Monte-Carlo computer simulation is applied. With this method, we analyze the wind speed measurement error caused by factors of (i) shear curvature, (ii) signal-to-noise (SNR) weighting, and (iii) height sensing error. |
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Key Words: Coherent Doppler lidar, Wind speed measurement, Shear flow |