All-Fiber Airborne Coherent Doppler Lidar to Measure Wind Profiles
| Autor: | Xiaolei Zhu, Wei Shi, Liyuan Jiang, Weifeng Diao, Xin Zhang, Yuan Liu, Jiqiao Liu, Weibiao Chen, Xiaopeng Zhu, Decang Bi |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Heterodyne
business.industry Physics QC1-999 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Wind speed law.invention 010309 optics Troposphere Azimuth Telescope symbols.namesake Lidar Optics law 0103 physical sciences symbols 0210 nano-technology business Doppler effect Theodolite Remote sensing |
| Zdroj: | EPJ Web of Conferences, Vol 119, p 10002 (2016) |
| ISSN: | 2100-014X |
| DOI: | 10.1051/epjconf/201611910002 |
| Popis: | An all-fiber airborne pulsed coherent Doppler lidar (CDL) prototype at 1.54μm is developed to measure wind profiles in the lower troposphere layer. The all-fiber single frequency pulsed laser is operated with pulse energy of 300μJ, pulse width of 400ns and pulse repetition rate of 10kHz. To the best of our knowledge, it is the highest pulse energy of all-fiber eye-safe single frequency laser that is used in airborne coherent wind lidar. The telescope optical diameter of monostatic lidar is 100 mm. Velocity-Azimuth-Display (VAD) scanning is implemented with 20 degrees elevation angle in 8 different azimuths. Real-time signal processing board is developed to acquire and process the heterodyne mixing signal with 10000 pulses spectra accumulated every second. Wind profiles are obtained every 20 seconds. Several experiments are implemented to evaluate the performance of the lidar. We have carried out airborne wind lidar experiments successfully, and the wind profiles are compared with aerological theodolite and ground based wind lidar. Wind speed standard error of less than 0.4m/s is shown between airborne wind lidar and balloon aerological theodolite. |
| Databáze: | OpenAIRE |
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