Abstract
Coherent Doppler lidar (CDL) has been a powerful instrument to measure atmospheric wind velocity. In this work, an 1.5 μm all-fiber pulsed CDL has been developed and deployed to measure wind profiles in campaign experiment in 2018. The CDL has 0.1-5 km detection range with range resolution of 30 m, temporal resolution of 16 s at Velocity-Azimuth-Display (VAD) mode. Field experiments were implemented and the wind vector profiles were retrieved. As compared with sounding balloon, the discrepancy of wind speed and direction are nearly 0.7 m/s and 5 degrees, respectively. It shows that the CDL is a powerful tool for wind speeds measurement in lower atmospheric troposphere.
Highlights
1.5 μm all-fiber pulsed Coherent Doppler lidar (CDL) has attracted much attentions due to its eye safety, compact size, flexible deployment and mature fiber components technology from telecommunication industry.[1]
2.1 The lidar system The pulsed CDL for wind velocity measurement is operated by transmitting high energy narrow bandwidth laser beam into the atmosphere, which can acquire LOS velocity by analyzing the Doppler shift between objective backscattered signal and local oscillator
The comparison scheme is given based on the quality of sounding balloon and CDL
Summary
1.5 μm all-fiber pulsed CDL has attracted much attentions due to its eye safety, compact size, flexible deployment and mature fiber components technology from telecommunication industry.[1]. The CDL shows good stability and reliability in field campaign. 2. METHODOLOGY 2.1 The lidar system The pulsed CDL for wind velocity measurement is operated by transmitting high energy narrow bandwidth laser beam into the atmosphere, which can acquire LOS velocity by analyzing the Doppler shift between objective backscattered signal and local oscillator. 2.2 Comparison of CDL and sounding balloon
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