Inspec keywords: phase measurement; optical radar; ocean waves; oceanographic equipment; gravity waves; adaptive systems; surface topography measurement; remote sensing by radar; radar tracking; remote sensing by laser beam; optical tracking

Other keywords: fixed time mode operation; shallow incidence angles; digital delay line; surface profile measurement; adaptive phase measurement system; slope-measuring continuous wave lidar; phase error; vector field representation; propagating deep water ocean gravity waves; phase shifter; tracking mode; phase locked loops; deterministic sea wave prediction; hybrid phase measuring system; PLL

Subjects: Surface waves, tides, and sea level; Spatial variables measurement; Spatial variables measurement; Instrumentation and techniques for geophysical, hydrospheric and lower atmosphere research; Optical radar; Oceanographic and hydrological techniques and equipment; Metrological applications of lasers; Metrological applications of lasers