Embodiments are directed towards a wave measuring electronics device that is integrated within a buoy and the buoy is moored in an ocean. The wave measurement device performs a computer-implemented method for estimating wave motion, including receiving 3D sensor data from each of an accelerometer and a gyroscope, determining, an absolute orientation of the buoy based on said 3D sensor data; and estimating, the true earth acceleration of the buoy over a specified time interval.
GOVERNMENT LICENSE RIGHTS
 This invention was made with government support under ARPA-E Award No. DE-AR0000305 awarded by THE U.S. Department of Energy. The government has certain rights in the invention.