Parameter Simulation and Design of an Airborne Hyperspectral Imaging LiDAR System

Remote Sensing

Decheng Wu¹  Dong Liu¹  Liyong Qian²  Le Wang²  Shalei Song³  Wei Gong⁴  Shuo Shi⁴ 

[1] Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China;College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China;Innovation Academy for Institute of Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China;State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, 129, Luoyu Road, Wuhan 430072, China;

关键词: remote sensing;    hyperspectral LiDAR;    parameter simulation;    signal-to-noise ratio;    supercontinuum laser;   

DOI  :  10.3390/rs13245123

来源: DOAJ

【 摘 要 】

With continuous technological development, the future development trend of LiDAR in the field of remote sensing and mapping is to obtain the elevation and spectral information of ground targets simultaneously. Airborne hyperspectral imaging LiDAR inherits the advantages of active and passive remote sensing detection. This paper presents a simulation method to determine the design parameters of an airborne hyperspectral imaging LiDAR system. In accordance with the hyperspectral imaging LiDAR equation and optical design principles, the atmospheric transmission model and the reflectance spectrum of specific ground targets are utilized. The design parameters and laser emission spectrum of the hyperspectral LiDAR system are considered, and the signal-to-noise ratio of the system is obtained through simulation. Without considering the effect of detector gain and electronic amplification on the signal-to-noise ratio, three optical fibers are coupled into a detection channel, and the power spectral density emitted by the supercontinuum laser is simulated by assuming that the signal-to-noise ratio is equal to 1. The power spectral density emitted by the laser must not be less than 15 mW/nm in the shortwave direction. During the simulation process, the design parameters of the hyperspectral LiDAR system are preliminarily demonstrated, and the feasibility of the hyperspectral imaging LiDAR system design is theoretically guaranteed in combination with the design requirements of the supercontinuum laser. The spectral resolution of a single optical fiber of the hyperspectral LiDAR system is set to 2.5 nm. In the actual prototype system, multiple optical fibers can be coupled into a detection channel in accordance with application needs to further improve the signal-to-noise ratio of hyperspectral LiDAR system detection.

【 授权许可】

Unknown