| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Decoupling of temporal/spatial broadening effects in Doppler wind LiDAR by 2D spectral analysis |
| Zhen Liu(刘珍)1,2, Yun-Peng Zhang(张云鹏)1,†, Xiao-Peng Zhu(竹孝鹏)1, Ji-Qiao Liu(刘继桥)1, De-Cang Bi(毕德仓)1,2, and Wei-Biao Chen(陈卫标)1,2,‡ |
1 Space Laser Engineering Department, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract Pulse echo accumulation is commonly employed in coherent Doppler wind LiDAR (light detection and ranging) under the assumption of steady wind. Here, the measured spectral data are analyzed in the time dimension and frequency dimension to cope with the temporal wind shear and achieve the optimal accumulation time. A hardware-efficient algorithm combining the interpolation and cross-correlation is used to enhance the wind retrieval accuracy by reducing the frequency sampling interval and then reduce the spectral width calculation error. Moreover, the temporal broadening effect and spatial broadening effect are decoupled according to the strategy we developed.
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Received: 20 October 2023
Revised: 21 November 2023
Accepted manuscript online: 30 November 2023
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PACS:
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42.68.Wt
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(Remote sensing; LIDAR and adaptive systems)
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42.79.Qx
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(Range finders, remote sensing devices; laser Doppler velocimeters, SAR, And LIDAR)
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| Fund: Project supported by the Shanghai Science and Technology Innovation Action (Grant No. 22dz1208700). |
Corresponding Authors:
Yun-Peng Zhang, Wei-Biao Chen
E-mail: zhangyunpeng@siom.ac.cn;wbchen@siom.ac.cn
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Cite this article:
Zhen Liu(刘珍), Yun-Peng Zhang(张云鹏), Xiao-Peng Zhu(竹孝鹏), Ji-Qiao Liu(刘继桥), De-Cang Bi(毕德仓), and Wei-Biao Chen(陈卫标) Decoupling of temporal/spatial broadening effects in Doppler wind LiDAR by 2D spectral analysis 2024 Chin. Phys. B 33 034214
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