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卫星微振动对测风激光雷达信噪比影响研究

Influence of Satellite Micro-Vibrationon Signal-to-Noise Ratio of Wind LiDAR

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摘要

大气风场的测量对于全球气候变化、海上暴风探测、日常天气预报精度,乃至国家军事安全具有重要意义。天基相干测风雷达以其高时-空分辨率、高灵敏度、实时探测、体积小等优点,受到广泛关注。大多数航天器都存在微振动扰动源,会对相干测风激光雷达的信噪比有一定影响。本文在对相干测风激光雷达系统原理分析的基础上,以某型号微振动实测数据为样本,分析了卫星微振动对相干测风激光雷达的信噪比的影响。实验结果表明:卫星微振动对于相干测风激光雷达的信噪比有一定影响,在失配角为3.77 μrad时,信噪比在-1.5 dB~1.36 dB之间浮动,相对来说影响较弱。从微振动的角度来讲,某卫星平台能够满足相干测风激光雷达的探测要求。

Abstract

The measurement of atmospheric wind field is of great significance for global climate change, sea storm detection, accuracy of daily weather forecast, and even national military security. Space-based coherent wind light detection and ranging (LiDAR) has attracted wide attention due to its high time-space resolution, high sensitivity, real-time detection, and small volume. Most spacecraft have micro-vibration disturbance sources, which can influence the signal-to-noise ratio (SNR) of coherent wind LiDAR. Based on the principle analysis of coherent wind LiDAR system, this paper analyzes the influence of satellite micro-vibration on the signal-to-noise ratio of the coherent wind LiDAR, based on the measured data of a certain type of micro-vibration. The experimental results show that satellite micro-vibration has a certain effect on the signal-to-noise ratio of coherent wind LiDAR. When the mismatch angle is 3.77 μrad, the signal-to-noise ratio fluctuates between -1.5 dB and 1.36 dB, and the impact is relatively weak. From a micro-vibration perspective, a satellite platform can meet the detection requirements of a coherent wind LiDAR.

Newport宣传-MKS新实验室计划
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中图分类号:P412.2

DOI:10.3788/LOP57.092802

所属栏目:遥感与传感器

收稿日期:2019-05-28

修改稿日期:2019-09-26

网络出版日期:2020-05-01

作者单位    点击查看

曹启鹏:航天东方红卫星有限公司, 北京 100094
李永昌:航天东方红卫星有限公司, 北京 100094
董小静:航天东方红卫星有限公司, 北京 100094
王超:航天东方红卫星有限公司, 北京 100094
王靖:航天东方红卫星有限公司, 北京 100094

联系人作者:曹启鹏(caoqipeng2004@126.com)

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引用该论文

Cao Qipeng,Li Yongchang,Dong Xiaojing,Wang Chao,Wang Jing. Influence of Satellite Micro-Vibrationon Signal-to-Noise Ratio of Wind LiDAR[J]. Laser & Optoelectronics Progress, 2020, 57(9): 092802

曹启鹏,李永昌,董小静,王超,王靖. 卫星微振动对测风激光雷达信噪比影响研究[J]. 激光与光电子学进展, 2020, 57(9): 092802

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