Optical Measurements of Ripples Using a Scanning Laser Slope Gauge Part 2: DataAnalysis and Interpretation from a Laboratory Wave Tank. (Reannouncement with New Availability Information)

摘要

A description of a new scanning laser slope gauge is given and the preliminaryresults obtained from laboratory wave tank measurements are presented. The device relies on the measurements of two components of surface slope to compute spatial and temporal lags used to estimate the full three-dimensional spectrum. The device is capable of resolving frequencies in the range between zero and 63 Hertz, and wavelengths in the range between 0.63 and 20 centimeters. The technique makes use of a two-dimensional laser scanner which samples the perimeter of a 10 centimeter square (an unfilled aperture). The laboratory results show mechanically-generated waves propagating on both distilled water and a one micromolar solution of Triton-X100 (registered) in distilled water. Results indicate the device is well suited to measure the full three dimensional spectra of capillary-gravity waves and is capable of providing ground-truth measurements for the verification of remotely sensed ocean surface features....Scanning laser slope gauge, Capillary waves, Three-dimensional wave spectra.