Remote sensing of the aquatic environment by semiconductor laser-induced fluorescence lidar

2021 ◽  
Author(s):  
Lanjun Sun ◽  
Shaojun Zhang ◽  
Zhaoshuo Tian ◽  
Yuehong Gong ◽  
Yanchao Zhang
Keyword(s):  
Remote Sensing ◽  
Semiconductor Laser ◽  
Aquatic Environment ◽  
Laser Induced Fluorescence

scholarly journals Mobile lidar system for environmental monitoring

2018 ◽  
Vol 176 ◽  
pp. 07002
Author(s):  
Guangyu Zhao ◽  
Ming Lian ◽  
Yiyun Li ◽  
Zheng Duan ◽  
Shiming Zhu ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Environmental Monitoring ◽  
Nd:Yag Laser ◽  
Field Experiments ◽  
Laser Induced Fluorescence ◽  
Dye Laser ◽  
Lidar System ◽  
Sensing System ◽  
Atomic Mercury

A versatile mobile remote sensing system for multidisciplinary environmental monitoring tasks on the Chinese scene is described. The system includes a 20 Hz Nd:YAG laser-pumped dye laser, optical transmitting/receiving systems with a 30 cm and a 40 cm Newtonian telescope, and electronics, all integrated in a laboratory, installed on a Jiefang truck. Results from field experiments on atomic mercury DIAL mapping and remote laser-induced fluorescence and break-down spectroscopy are given.

Remote sensing of phytoplankton using laser-induced fluorescence

1993 ◽  
Vol 45 (1) ◽  
pp. 43-50 ◽  
Author(s):  
S. Babichenko ◽  
L. Poryvkina ◽  
V. Arikese ◽  
S. Kaitala ◽  
H. Kuosa
Keyword(s):  
Remote Sensing ◽  
Laser Induced Fluorescence

scholarly journals THE EFFECTIVE OF DIFFERENT EXCITATION WAVELENGTHS ON THE IDENTIFICATION OF PLANT SPECIES BASED ON FLUORESCENCE LIDAR

2016 ◽  
Vol XLI-B1 ◽  
pp. 147-150
Author(s):  
Jian Yang ◽  
Wei Gong ◽  
Shuo Shi ◽  
Lin Du ◽  
Jia Sun ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Plant Species ◽  
Fluorescence Spectra ◽  
Principal Component ◽  
Laser Induced Fluorescence ◽  
Support Vector ◽  
Excitation Wavelength ◽  
Lidar System ◽  
Excitation Light

Laser-induced fluorescence (LIF) served as an active technology has been widely used in many field, and it is closely related to excitation wavelength (EW). The objective of this investigation is to discuss the performance of different EWs of LIF LiDAR in identifying plant species. In this study, the 355, 460 and 556 nm lasers were utilized to excite the leaf fluorescence and the fluorescence spectra were measured by using the LIF LiDAR system built in the laboratory. Subsequently, the principal component analysis (PCA) with the help of support vector machine (SVM) was utilized to analyse fluorescence spectra. For the three EWs, the overall identification rates of the six plant species were 80 %, 83.3 % and 90 %. Experimental results demonstrated that 556 nm excitation light source is superior to 355 and 460 nm for the classification of the plant species for the same genus in this study. Thus, an appropriate excitation wavelength should be considered when the LIF LiDAR was utilized in the field of remote sensing based on the LIF technology.

scholarly journals Lidar remote sensing of the aquatic environment: invited

2020 ◽  
Vol 59 (10) ◽  
pp. C92 ◽  
Author(s):  
James H. Churnside ◽  
Joseph A. Shaw
Keyword(s):  
Remote Sensing ◽  
Aquatic Environment

An Experimentally Studied Laser Fluorescence Method for Sensing Stress Situations of Oil-polluted Plants

2017 ◽  
pp. 1-11
Author(s):  
Yu. V. Fedotov ◽  
D. A. Kravtsov ◽  
A. A. Cherpakova ◽  
M. L. Belov ◽  
V. A. Gorodnichev
Keyword(s):  
Remote Sensing ◽  
Water Surface ◽  
Fluorescence Spectra ◽  
Oil Pollution ◽  
Laser Induced Fluorescence ◽  
Laser Fluorescence ◽  
Fluorescence Intensity Ratio ◽  
Laboratory Setup ◽  
The Earth ◽  
Study Results

Nowadays, one of the promising applications for the laser fluorescent analysis in remote sensing is to monitor oil pollution both on the water surface and on the earth one.A task to provide laser fluorescence remote sensing of oil pollution on the earth surface is much more difficult than that of to do the same on the water surface. The monitoring oil pollution laser fluorescence results can have no large reliability (lead to the great number of false alarms) because of the great number of disrupters (for example, plant fluorescence).However, plants available in the pipeline corridor may be not only disrupter, but also an oil pollution mark. Oil pollutions lead to developmental disorder of plants and induce their stress. The laser fluorescence methods can detect such stress situations.The paper concentrates on the experimental studies of laser fluorescence remote sensing method to detect the plant oil pollution stress situations for the eye-safe fluorescence excitation wavelength of 355 nm.A laboratory setup was designed to study spectra of laser-induced fluorescence of plants. In the laboratory setup the third harmonic of the Nd-YAG laser at the eye-safe wavelength of 355 nm was used as a fluorescence-exciting source. The laser-induced fluorescence spectra of plants were measured within 380 – 780 nm spectrum range.The experimental study results of laser-induced fluorescence spectra of plants in normal and stress situations caused by oil pollution are given for the eye-safe fluorescence- exciting wavelength ofThe paper shows that the analysis of recorded laser-induced fluorescence spectra allows us to detect stress situations caused by oil pollution. An identifiable factor to characterise a profile deformation of the laser-induced fluorescence spectrum for stress situations may be a fluorescence intensity ratio in the spectral ranges of 680…690 nm and 730…740 nm.

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