Buoy Directional Wave Measurements Using Magnetic Field Components

by David W. Wang, Computer Sciences Corp, Stennis Space Cent, United States,
C. C. Teng, Computer Sciences Corp, Stennis Space Cent, United States,
R. Ladner, Computer Sciences Corp, Stennis Space Cent, United States,



Document Type: Proceeding Paper

Part of: Ocean Wave Measurement and Analysis

Abstract: Directional wave data can be estimated using the heave, pitch and roll motion of a discus buoy, which are conventionally measured by a pitch-roll sensor. To reduce the size and cost, this study presents a method to determine the buoy's azimuth, pitch, and roll angles from the two magnetic field components along two orthogonal axes parallel to the deck of a buoy measures by a fixed magnetometer. An evaluation of three months of directional wave measurements from a 3-meter discus buoy is presented. The directional wave data from using the magnetic agree well with those derived from measurements by a pitch-roll sensor.

Subject Headings: Wave measurement | Magnetic fields | Probe instruments | Water waves | Field tests | Heave | Motion (dynamics) | Azimuth

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