A Doppler LIDAR was installed at HKIA in mid-2002 to enhance the detection and warning of wind shear under clear-air conditions. This paper examines the feasibility of using the LIDAR for turbulence detection in an operational setting based on data collected for the above-mentioned turbulence episode. The LIDAR imageries reveal the presence of small-scale wind disturbances with length scale of only a few hundred metres across associated with the terrain-induced turbulence (see Figures 1 and 2).
The paper will present comparison results of Doppler velocity variance and spectral widths versus aircraft recorded wind and accelerometer readings during the turbulence episode. Altogether a total of 82 sets of flight data have been examined. Areas for further enhancement of operational turbulence detection will be discussed.