A discus-hulled wave measuring buoy |
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Authors: | Robert H Stewart |
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Institution: | Scripps Institution of Oceanography, La Jolla, California 92093, U.S.A. |
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Abstract: | Described herein is a self-contained, discus-hulled buoy 1.5 m dia., weighing 150 kg, which uses inertial instruments to measure wave height and tilt. Wave tank calibration and the theory of shallow draft buoys demonstrate such a hull accurately follows waves with length greater than twice the buoy diameter. The non-linear response of the buoy determines its sensitivity to low-frequency waves in a sea. And the ratio of wave signal to instrument “noise” is constant over the energetic part of the ocean-wave spectrum for measurements of wave acceleration and slope. |
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