Sensors 2011, 11(1), 1043-1058; doi:10.3390/s110101043
Article

Wave Measurements Using GPS Velocity Signals

1,* email, 2,* email and 3email
Received: 21 October 2010; in revised form: 24 November 2010 / Accepted: 7 January 2011 / Published: 18 January 2011
(This article belongs to the Section Physical Sensors)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: This study presents the idea of using GPS-output velocity signals to obtain wave measurement data. The application of the transformation from a velocity spectrum to a displacement spectrum in conjunction with the directional wave spectral theory are the core concepts in this study. Laboratory experiments were conducted to verify the accuracy of the inversed displacement of the surface of the sea. A GPS device was installed on a moored accelerometer buoy to verify the GPS-derived wave parameters. It was determined that loss or drifting of the GPS signal, as well as energy spikes occurring in the low frequency band led to erroneous measurements. Through the application of moving average skill and a process of frequency cut-off to the GPS output velocity, correlations between GPS-derived, and accelerometer buoy-measured significant wave heights and periods were both improved to 0.95. The GPS-derived one-dimensional and directional wave spectra were in agreement with the measurements. Despite the direction verification showing a 10° bias, this exercise still provided useful information with sufficient accuracy for a number of specific purposes. The results presented in this study indicate that using GPS output velocity is a reasonable alternative for the measurement of ocean waves.
Keywords: GPS; wave measurement; directional wave spectrum
PDF Full-text Download PDF Full-Text [4477 KB, uploaded 21 June 2014 03:28 CEST]

Export to BibTeX |
EndNote


MDPI and ACS Style

Doong, D.-J.; Lee, B.-C.; Kao, C.C. Wave Measurements Using GPS Velocity Signals. Sensors 2011, 11, 1043-1058.

AMA Style

Doong D-J, Lee B-C, Kao CC. Wave Measurements Using GPS Velocity Signals. Sensors. 2011; 11(1):1043-1058.

Chicago/Turabian Style

Doong, Dong-Jiing; Lee, Beng-Chun; Kao, Chia Chuen. 2011. "Wave Measurements Using GPS Velocity Signals." Sensors 11, no. 1: 1043-1058.

Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert