多光谱对地观测激光雷达接收通道选择方法

发布时间：2018-09-19 19:29

【摘要】：多光谱对地观测激光雷达是一种新型植被监测手段,其应用越来越广泛。现有多光谱对地观测激光雷达系统大多采用光栅分光、多通道光敏阵列探测的数据接收模式。单纯地增加接收通道以提高光谱分辨率、增加接收光谱范围会带来数据冗余、系统集成难度大以及成本过高等问题。讨论了如何确定通道数目并通过闪耀光栅以及中心闪耀波长的选取将特征波长调节至合适通道的中心位置;同时,利用基于主成分分析的特征权重波长修正方法,对落在通道外或不在通道中心位置的特征波长进行修正。在不减少植被光谱信息的前提下,此过程可提高信息接收的有效性,还在一定程度上对波长选择理论进行了补充,提高了多光谱对地观测激光雷达系统在实际应用中的适应性。
[Abstract]:Multispectral Earth observation lidar is a new vegetation monitoring method, and its application is more and more extensive. Most of the existing multispectral earth observation lidar systems adopt the data receiving mode of grating splitting and multichannel Guang Min array detection. Simply increasing the receiving channels to improve the spectral resolution, increasing the range of the received spectrum will bring data redundancy, the system integration is difficult and the cost is too high. This paper discusses how to determine the number of channels and adjust the characteristic wavelength to the center of the appropriate channel through the selection of blazed gratings and central blazed wavelengths, at the same time, using the method of correction of characteristic weighted wavelengths based on principal component analysis. The characteristic wavelength that falls outside the channel or is not in the center of the channel is corrected. On the premise of not reducing vegetation spectral information, this process can improve the efficiency of receiving information, supplement the theory of wavelength selection to a certain extent, and improve the adaptability of multispectral ground observation lidar system in practical application.
【作者单位】：武汉大学测绘遥感信息工程国家重点实验室;中国科学院武汉物理与数学研究所;
【分类号】：TN958.98

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