TY - JOUR
T1 - Evaluation of a GNSS for wave measurement and directional wave spectrum analysis
AU - Gu, Hanbin
AU - Zhu, Xiaoan
AU - Shan, Rui
AU - Zang, Jun
AU - Qian, Ling
AU - Lin, Pengzhi
N1 - Funding Information:
The first and third authors thank support from National Natural Science Foundation of China with NO. 41406115 , project of China Geological Survey with NO. DD20191003 , Zhejiang Public Welfare Fund with NO. LGJ19E090001 and Open Fund of the State Key Laboratory of Hydraulics and Mountain River Development and Protection, Sichuan University , with No. SKHL2108 .
Data availability
Data will be made available on request
PY - 2023/2/15
Y1 - 2023/2/15
N2 - Wave buoys are important devices to monitor and analyze wave data for ocean and coastal engineering. A GNSS wave buoy is briefly introduced in the paper, which has high resolution to measure the buoy motion by vertical, north-south and west-east displacements and independent velocities in above three directions. Based on the displacements and velocities, statistical results, frequency spectra and directional spectra are analyzed, and results based on the displacements are compared with that from Waverider with a distance less than 6m deployed in the special sea water with the GNSS buoy. Wave profiles comparison show that GNSS buoy presented slightly large significant wave height and mean wave height due to its high sampling frequency, and resulted in smaller mean wave period than that from Waverider. Statisticaly, between the analyzing result of the GNSS and wave rider, the maximum error of wave height is about 5.5%; and the maximum difference of wave period is about 0.5s, when sampling frequency is similar. The energy spectra were basically consistent from these two devices. The peaks of directional spectra were similar but the spreading angle was smaller from GNSS. Results mean the GNSS device presents almost similar wave information to that from Waverider.
AB - Wave buoys are important devices to monitor and analyze wave data for ocean and coastal engineering. A GNSS wave buoy is briefly introduced in the paper, which has high resolution to measure the buoy motion by vertical, north-south and west-east displacements and independent velocities in above three directions. Based on the displacements and velocities, statistical results, frequency spectra and directional spectra are analyzed, and results based on the displacements are compared with that from Waverider with a distance less than 6m deployed in the special sea water with the GNSS buoy. Wave profiles comparison show that GNSS buoy presented slightly large significant wave height and mean wave height due to its high sampling frequency, and resulted in smaller mean wave period than that from Waverider. Statisticaly, between the analyzing result of the GNSS and wave rider, the maximum error of wave height is about 5.5%; and the maximum difference of wave period is about 0.5s, when sampling frequency is similar. The energy spectra were basically consistent from these two devices. The peaks of directional spectra were similar but the spreading angle was smaller from GNSS. Results mean the GNSS device presents almost similar wave information to that from Waverider.
KW - Directional function
KW - Directional wave spectrum
KW - Frequency wave spectrum
KW - GNSS
KW - Parametric method
KW - Wave buoy
UR - http://www.scopus.com/inward/record.url?scp=85149744210&partnerID=8YFLogxK
U2 - 10.1016/j.oceaneng.2023.113683
DO - 10.1016/j.oceaneng.2023.113683
M3 - Article
AN - SCOPUS:85149744210
SN - 0029-8018
VL - 270
JO - Ocean Engineering
JF - Ocean Engineering
M1 - 113683
ER -