Affiliation:
1. School of Engineering, Computer Science and Mathematics, University of Exeter, Devon, United Kingdom
Abstract
A lidar scanning system is described that is primarily designed to measure sea wave shape. The device is capable of measuring real-time spatial profiles over distances of hundreds of meters, and as the lidar must inevitably operate from modest elevations (e.g., from a vessel’s masthead), it is inherently a very shallow angle metrology device. This results in a highly nonuniform distribution of the wave elevation values. The vertical and horizontal resolution is primarily set by the characteristics of the optical system employed and range/data capacity is set by signal-to-noise ratio considerations. Illustrative data are presented as consecutive profiles taken 0.2 s apart for highly trochoidal waves under conditions where the height was recorded to ±0.03 m and horizontal sample separation to ±0.025 m. A comparison is presented with traditional wave staff measurements.
Publisher
American Meteorological Society
Subject
Atmospheric Science,Ocean Engineering
Reference12 articles.
1. Nonuniform sampling specifically for finite-length data
2. An extension of Nyquist's theorem to non-uniformly sampled finite length data
3. Iterative Reconstruction of Multivariate Band-Limited Functions from Irregular Sampling Values
4. Gallagher, E. J., S. Elgar, and R. T. Guzt, 1998: Observation of sand bar evolution on a natural beech. J. Geophys. Res., 103,C2. 3200–3215.
5. Guenther, G. C., R. W. L. Thomas, and P. E. LaRocque, 1996b: Design considerations for achieving high accuracy with the SHOALS Bathymetric Lidar System. SPIE: Laser Remote Sens. Nat. Waters Theory Pract., 2964,54–71.
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