Characterization of Aircraft Dynamic Wake Vortices and Atmospheric Turbulence by Coherent Doppler Lidar Songhua Wu (a, b)*, Xiaochun Zhai (a), Bingyi Liu (a, b) (a) Ocean Remote Sensing Institute, College of Information Science and Engineering, Ocean University of China, Qingdao 266100, China. (b) Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266100, China. *Email: [email protected]1. Introduction Wake vortex are large rolling air masses generated by aircraft as a consequence of lift. The behavior of that wake vortex is a major issue in aeronautical research [1,2] . They are strongest and most hazardous on congested airfields during take-off and landing, i.e. in close proximity to the ground. It is held that serious interactions between wake vortex and the ground can significantly affect the evolution of wake vortex, thus making them difficult to predict [3-4] . In order to investigate the real approach to mitigate wake vortex using 1.55μm coherent Doppler lidar and to study the wake vortex near ground effect (NGE), the wake vortex observation project was carried out during Jan-Mar 2017 at Beijing Capital International Airport (BCIA) [5] . This paper focuses on the NGE analyze based on 2017 BCIA experiment (2017BCIAE) observation. 2. Setup and Method A scanning Doppler lidar and a wind profiler lidar are used during 2017BCIAE. The main specifications of these two setups are listed in Table 1. Figure 1 (a) shows the sketch map of lidar location at BCIA from 20 Jan 2017 to 20 Mar 2017. Figure 1 (b) shows the field experiment at BCIA. Since the direction of landing depends on the wind direction and the prevailing wind direction at BCIA in winter is northerly wind, the meteorological station in the south of 01L/36R runway was selected to deploy the CDL for wake vortex measurement. Table 1. The specifications of the 3D scanning lidar and wind profile lidar Qualification 3D scanning lidar wind profile lidar Wavelength 1.55 μm 1.55 μm Data update rate 4 Hz (fastest) 1 Hz Measurement range 40 m - 4000 m 40 ~ 240 m Radial velocity measurement range 37 5 . 1 ms 37 5 . 1 ms Radial range resolution 15 m - 60 m configurable Scanning features VAD 5- DBS Weight ~75 kg 45 kg Power consumption <300 W 90 W Th5
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Characterization of Aircraft Dynamic Wake Vortices andclrccires.colorado.edu/data/paper/Th5.pdfAtmospheric Turbulence by Coherent Doppler Lidar Songhua Wu (a, b)*, Xiaochun Zhai (a),
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Characterization of Aircraft Dynamic Wake Vortices and
Atmospheric Turbulence by Coherent Doppler Lidar
Songhua Wu (a, b)*, Xiaochun Zhai (a), Bingyi Liu (a, b)
(a) Ocean Remote Sensing Institute, College of Information Science and Engineering,
Ocean University of China, Qingdao 266100, China.
(b) Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National
Laboratory for Marine Science and Technology, Qingdao 266100, China.