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Remote Sens. 2017, 9(5), 426; doi:10.3390/rs9050426

Shallow Water Measurements Using a Single Green Laser Corrected by Building a Near Water Surface Penetration Model

1
School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan 430079, China
2
Institute of Marine Science and Technology, Wuhan University, Wuhan 430079, China
3
Automation Department, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China
4
The Survey Bureau of Hydrology and Water Resources of Yangtze Estuary, Shanghai 200136, China
*
Author to whom correspondence should be addressed.
Academic Editors: Deepak R. Mishra and Prasad S. Thenkabail
Received: 25 February 2017 / Revised: 12 April 2017 / Accepted: 27 April 2017 / Published: 30 April 2017
View Full-Text   |   Download PDF [2746 KB, uploaded 4 May 2017]   |  

Abstract

To reduce the size and cost of an integrated infrared (IR) and green airborne LiDAR bathymetry (ALB) system, and improve the accuracy of the green ALB system, this study proposes a method to accurately determine water surface and water bottom heights using a single green laser corrected by the near water surface penetration (NWSP) model. The factors that influence the NWSP of green laser are likewise analyzed. In addition, an NWSP modeling method is proposed to determine the relationship between NWSP and the suspended sediment concentration (SSC) of the surface layer, scanning angle of a laser beam and sensor height. The water surface and water bottom height models are deduced by considering NWSP and using only green laser based on the measurement principle of the IR laser and green laser, as well as employing the relationship between NWSP and the time delay of the surface return of the green laser. Lastly, these methods and models are applied to a practical ALB measurement. Standard deviations of 3.0, 5.3, and 1.3 cm are obtained by the NWSP, water-surface height, and water-bottom height models, respectively. Several beneficial conclusions and recommendations are drawn through the experiments and discussions. View Full-Text
Keywords: airborne LiDAR bathymetry; near water surface penetration; water surface height; water bottom height; suspended sediment concentration of the surface layer airborne LiDAR bathymetry; near water surface penetration; water surface height; water bottom height; suspended sediment concentration of the surface layer
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Zhao, J.; Zhao, X.; Zhang, H.; Zhou, F. Shallow Water Measurements Using a Single Green Laser Corrected by Building a Near Water Surface Penetration Model. Remote Sens. 2017, 9, 426.

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