Numerical simulation analysis for detectability of spaceborne lidars
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摘要: 为了研究星载大气探测激光雷达的技术参量对其探测性能的影响,采用合适的大气模式和星载大气探测激光雷达设计参量,对其接收的大气后向散射回波信号和探测回波信号的信噪比进行了数值模拟计算;同时模拟分析了星载大气探测激光雷达对沙尘和卷云的探测能力。结果表明,星载大气探测激光雷达对气溶胶的探测水平分辨率应设置为75km,且仅夜晚的探测能力能够达到信噪比大于10的要求;对卷云和沙尘探测水平分辨率应设为7.5km。该结果为该星载大气探测激光雷达的研制提供参量设置的基本依据。
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关键词:
- 大气与海洋光学 /
- 星载大气探测激光雷达 /
- 数值模拟 /
- 信噪比 /
- 卷云
Abstract: In order to study the effect of the technical parameters of a spaceborne atmosphere sounding lidar on its aerosol detectability,atmosphere backscattering returned signals and signal-to-noise ratio of sounding signal were numerically analyzed by making use of appropriate atmosphere pattern and setting parameters of a spaceborne atmosphere sounding lidar.The detectability of a spaceborne atmosphere sounding lidar about dust and cirruswas simulated.The simulation results revealed that a spaceborne atmosphere sounding lidar's horizontal resolution setting for aerosol detection should be 75km,and its sounding ability for detecting aerosol could achieve the detection requirement at night only and that the horizontal resolution for cirrus and dust detection should be 7.5km.The obtained results offer academic foundation of parameters,setting for manufacture of a spaceborne atmosphere sounding lidar. -
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