Modeling the effects of surface and bottom geometries on LiDAR bathymetric waveforms

Author

Montes-Hugo, Martin Alejandro ; Bailly, Jean-Stephane ; Baghdadi, Nicolas ; Bouhdaoui, Anis

Author_Institution

ISMER, UQAR, Rimouski, QC, Canada

fYear

2014

fDate

13-18 July 2014

Firstpage

2706

Lastpage

2708

Abstract

LiDAR bathymetric biases due to geometric changes at the air-water and water-bottom interfaces are investigated based on calculations made with a modified version of the waveform simulator Wa-LID. Main assumptions include a homogeneous water column and a spaceborne LiDAR having a footprint smaller than 50 m and a wavelength centered at 532 nm. Preliminary results showed major temporal modifications on second Lidar return (up to 100 cm or 10 ns) due to tilted bottoms. This shift was in average >6-fold the maximum bottom depth bias originated from capillary waves forming at the air-water surface.

Keywords

bathymetry; optical radar; remote sensing by laser beam; LiDAR bathymetric waveforms; Wa-LID; air-water interface; bottom geometry effect; capillary waves; homogeneous water column; second Lidar return; spaceborne LiDAR; surface geometry effect; water-bottom interface; waveform simulator; Atmospheric modeling; Geometry; Laser radar; Optical surface waves; Sea surface; Surface morphology; Surface waves; Lidar; bathymetry; bottom; model; surface effects;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium (IGARSS), 2014 IEEE International

Conference_Location

Quebec City, QC

Type

conf

DOI

10.1109/IGARSS.2014.6947033

Filename

6947033