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Advances in Meteorology
Volume 2014, Article ID 162748, 8 pages
http://dx.doi.org/10.1155/2014/162748
Research Article

Application of Short-Range LIDAR in Early Alerting for Low-Level Windshear and Turbulence at Hong Kong International Airport

1Hong Kong Observatory, 134A Nathan Road, Kowloon, Hong Kong
2School of Mathematical & Statistical Sciences, Arizona State University, Tempe, AZ 85287, USA

Received 2 August 2014; Revised 6 November 2014; Accepted 11 November 2014; Published 1 December 2014

Academic Editor: Hiroyuki Hashiguchi

Copyright © 2014 K. K. Hon et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Hong Kong Observatory currently uses a series of meteorological instruments, including long-range LIDAR (light detection and ranging) systems, to provide alerting services of low-level windshear and turbulence for Hong Kong International Airport. For some events that are smaller in spatial dimensions and are rapidly changing, such as low altitude windshear and turbulence associated with buildings or man-made structures, it would be necessary to involve meteorological instruments that offer greater spatial resolution. Therefore, the Observatory has set up a short-range LIDAR on the roof of the AsiaWorld-Expo during the summers over the past several years, conducting field research on the feasibility of strengthening early alerting for windshear and turbulence over the north runway’s eastern arrival runway (Runway 25RA) and developing an automated early alerting algorithm. This paper takes the pilot reports for Runway 25RA during the 2013 field research as verification samples, using different thresholds for radial wind velocity spatial and temporal changes detected by the short-range LIDAR to calculate the relative operating characteristic (ROC) curve, and analyzes its early alerting performance.