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Proceedings Paper

Telescope aperture optimization for spacebased coherent wind lidar
Author(s): Xian-ying Ge; Jun Zhu; Qipeng Cao; Yinchao Zhang; Huan Yin; Xiaojing Dong; Chao Wang; Yongchao Zhang; Ning Zhang
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Paper Abstract

Many studies have indicated that the optimum measurement approach for winds from space is a pulsed coherent wind lidar, which is an active remote sensing tool with the characteristics that high spatial and temporal resolutions, real-time detection, high mobility, facilitated control and so on. Because of the significant eye safety, efficiency, size, and lifetime advantage, 2μm wavelength solid-state laser lidar systems have attracted much attention in spacebased wind lidar plans. In this paper, the theory of coherent detection is presented and a 2μm wavelength solid-state laser lidar system is introduced, then the ideal aperture is calculated from signal-to-noise(SNR) view at orbit 400km. However, considering real application, even if the lidar hardware is perfectly aligned, the directional jitter of laser beam, the attitude change of the lidar in the long round trip time of the light from the atmosphere and other factors can bring misalignment angle. So the influence of misalignment angle is considered and calculated, and the optimum telescope diameter(0.45m) is obtained as the misalignment angle is 4 μrad. By the analysis of the optimum aperture required for spacebased coherent wind lidar system, we try to present the design guidance for the telescope.

Paper Details

Date Published: 5 August 2015
PDF: 6 pages
Proc. SPIE 9621, 2015 International Conference on Optical Instruments and Technology: Advanced Lasers and Applications, 96210L (5 August 2015); doi: 10.1117/12.2189706
Show Author Affiliations
Xian-ying Ge, Aerospace DongFangHong Satellite Co., Ltd. (China)
Jun Zhu, Aerospace DongFangHong Satellite Co., Ltd. (China)
Qipeng Cao, Aerospace DongFangHong Satellite Co., Ltd. (China)
Yinchao Zhang, Beijing Institute of Technology (China)
Huan Yin, Aerospace DongFangHong Satellite Co., Ltd. (China)
Xiaojing Dong, Aerospace DongFangHong Satellite Co., Ltd. (China)
Chao Wang, Aerospace DongFangHong Satellite Co., Ltd. (China)
Yongchao Zhang, Aerospace DongFangHong Satellite Co., Ltd. (China)
Ning Zhang, Beijing Electro-mechanical Engineering Institute (China)


Published in SPIE Proceedings Vol. 9621:
2015 International Conference on Optical Instruments and Technology: Advanced Lasers and Applications
Jianqiang Zhu; Chunqing Gao, Editor(s)

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