Dataset for "Breaking Wave Imaging using Lidar and Sonar"

Data collection method:

The experiment was completed in the GWK Large Wave Flume in Hanover. The flume measures 309 m long, 5 m wide and 7 m deep and is equipped with a combined piston-flap-type wave paddle. A sandy beach with an initially planar slope of 1:15 was constructed at the opposite end of the flume to the wave paddle. Lidar data were collected using an array of 3 roof-mounted SICK LMS511 2D scanning Lidar. The locations of each instrument are provided in the paper. The array of instruments enabled the free surface elevation to be detected along a 60m transect throughout the surf and swash zone. Data was collected at 25Hz and the instrument had an angular resolution of 0.1666degrees. Multibeam data were collected using a bed-mounted Reson SeaBat 7125 multibeam instrument. The device was positioned seaward of the breaking wave location approximately 2 m below the still water level looking up and back toward the shallow section of the wave flume. Data was collected at 10 Hz. For further details of the methodology used, see the "Methodology" section of the corresponding paper.

Data processing and preparation activities:

Lidar data were converted from polar to cartesian coordinates to give the x and z positions of the free surface.

Technical details and requirements:

Lidar data was collected using SICK LMS511 instruments. The instruments were sampled using in-house data-acquisition software. Polar to Cartesian coordinate conversion was done using Matlab. Multibeam data was collected using a Reson SeaBat 7125 instrument. Matlab is required to use the stored dataset.