Qichao Wang 19 th Coherent Laser Radar Conference The Wind Observation over Sea Surface by UAV-borne Coherent Doppler Lidar Qichao Wang (a), Songhua Wu (a, b)*, Jintao Liu (a), Kailin Zhang (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]Abstract: A compact UAV-borne Coherent Doppler Lidar (UCDL) was developed by the Ocean University of China (OUC) for the observations of wind profiles and boundary layer structures in Marine Atmospheric Boundary Layer (MABL). The first flight campaign was conducted at Hailing Island (111.99°E, 21.62°N) from November to December 2016. The motion-correction and wind retrieval methodology of the UCDL are expounded in detail. Additionally, the backscatter signals of sea surface are used to retrieve and calibrate the wind field. During the first flight campaign, the wind observations from the UCDL are intercompared with the results from a collocated ground-based coherent Doppler lidar (GCDL). The characteristics of the wind field are also discussed in this paper. Keywords: UAV-borne Coherent Doppler Lidar, Sea Surface Wind, Data Retrieval, Correction and Validation. 1. Introduction Accurate and rapid wide-range observation of sea surface wind is important for the research of ocean dynamic prediction model, offshore wind resource assessment, air-sea interaction and flux. The coherent Doppler wind lidar integrated at an air-based platform provides an approach to conduct such observations [1-4]. Hence, an UAV-borne Coherent Doppler Lidar (UCDL) was developed by the Ocean University of China (OUC), it is a compact wind detection system with a light weight of 23.2 kg. The operated eye-safety laser in the UCDL generates a light pulse at the wavelength of 1.55 μm with the energy of 100 μJ. The full width at half maximum (FWHM) of the pulse width is 200 ns, which indicates a radial spatial resolution of 30 m [5]. Figure 1. Shipborne UAV ocean observation system and flight routes of the first experiment P30
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Qichao Wang 19th Coherent Laser Radar Conference
The Wind Observation over Sea Surface by UAV-borne
Coherent Doppler Lidar Qichao Wang (a), Songhua Wu (a, b)*, Jintao Liu (a), Kailin Zhang (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.