光学学报, 2015, 35 (7): 0701001, 网络出版: 2015-07-01
激光大足印多目标距离信息提取与验证技术
Technology of Laser Large-Footprint Multi-Objective Relative Distance Information Extraction and Verification
遥感 星载激光高度计 波形分解 多目标 相对距离 大足印 remote sensing space- borne laser altimeter waveform decomposition multi- objective relative distance large-footprint
摘要
针对星载对地观测激光高度计大足印回波信号中多目标相对高程信息提取的问题,采用基于最小二乘的高斯分解算法对波形数据进行多目标分离,设计了全波形采集系统,并开展了地面多目标分离的算法验证实验。实验结果表明,该算法可有效分离回波信号中的多个目标,目标间相对距离偏差小于0.03m,验证了激光大足印全波形采集系统进行多目标相对距离信息提取的可行性,对星载对地观测激光高度计的系统设计及数据处理算法的研究具有重要借鉴意义。
Abstract
In order to extract the relative elevation information of multi-objects from the echo waveform of the spaceborne earth observing laser altimeter with large- footprint, a Levenberg- Marquardt- based Gaussian decomposition algorithm is used to separate the waveforms, and a full-waveform acquisition system is developed for multi-objects. Experiments on the ground-based multi-objective distance information acquisition are carried out to verify the decomposition algorithm. The experimental results show that the calculated relative distance error of multi-objectives is less than 0.03 m which reveals the effectiveness of algorithm in separating multi-objects from echo waveforms and the validity of the large-footprint full-waveform acquisition system for expracting the relative distance informention of mulit-objects. The research is useful for the design of space-borne laser altimeter system and the study of data processing algorithm.
蓝晓萍, 黄庚华, 王海伟, 吴军. 激光大足印多目标距离信息提取与验证技术[J]. 光学学报, 2015, 35(7): 0701001. Lan Xiaoping, Huang Genghua, Wang Haiwei, Wu Jun. Technology of Laser Large-Footprint Multi-Objective Relative Distance Information Extraction and Verification[J]. Acta Optica Sinica, 2015, 35(7): 0701001.