Multi-wavelength canopy LiDAR for remote sensing of vegetation: Design and system performance

• Published in: ISPRS journal of photogrammetry and remote sensing Vol. 69; pp. 1 - 9
• Main Authors: Wei, Gong, Shalei, Song, Bo, Zhu, Shuo, Shi, Faquan, Li, Xuewu, Cheng
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.04.2012; Elsevier
• Subjects: Animal, plant and microbial ecology; Applied geophysics; Biological and medical sciences; Canopies; canopy; Earth sciences; Earth, ocean, space; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; General aspects. Techniques; Instrumentation; Internal geophysics; Laser vegetation index; lasers; Leaves; Lidar; Multi-wavelength canopy LiDAR; nitrogen; Optical design; Physiology; reflectance; Remote sensing; rice; spectral analysis; Teledetection and vegetation maps; Vegetation; Vegetation physiology; Wavelength selection; wavelengths; Laser vegetation index; Multi-wavelength canopy LiDAR; Wavelength selection; Vegetation physiology; Remote sensing; wavelength; stress; Monocotyledones; laser methods; reflectance; nitrogen; physiology; remote sensing; vegetation; Oryza sativa; optical properties; Gramineae; Angiospermae; Spermatophyta; calibration; performances; Canopy(vegetation)
• ISSN: 0924-2716; 1872-8235
• DOI: 10.1016/j.isprsjprs.2012.02.001

A new multi-wavelength canopy LiDAR (MWCL) system intended for the remote sensing of vegetation reflection was designed and its measurement performance was investigated. The system operates with four lasers of different wavelengths chosen according to nitrogen stresses that induce changes in the optical properties and spectral reflectance of rice leaves. The optical design and instrumentation are described in this paper as well as a discussion on system calibration. The MWCL system was demonstrated to possess a high capability of recording the physiology of the canopy, which is not possible when solely employing a traditional single-wavelength LiDAR.