wavefromsurfaceelevzcross#
[Hs, Ts, Hz, Tz, Hrms, H, T] = wavefromsurfaceelevzcross(Eta, fs, dispout)
Description#
Calculate wave properties from water surface elevation by using an upward zero crossing method
Inputs#
- Eta
Water surface elevation time series data in (m)
- fs
Sampling frequency that data collected at in (Hz)
- dispout=’no’;
Define to display outputs or not (‘yes’: display, ‘no’: not display)
Outputs#
- Hs
Significant Wave Height (m)
- Ts
Significant Wave Period (second)
- Hz
Zero Crossing Mean Wave Height (m)
- Tz
Zero Crossing Mean Wave Period (second)
- Hrms
Root Mean Square Wave Height (m)
- H
Wave Height Data Series array (m)
- T
Wave Period Data Series array (second)
Examples#
fs=2; %Sampling frequency
duration=1024; %Duration of the data
N=fs*duration; %Total number of points
df=fs/N; %Frequency difference
dt=1/fs; %Time difference, dt=1/fs
t(:,1)=linspace(0,duration-dt,N); %Time
Eta(:,1)=detrend(0.5.*cos(2*pi*0.2*t)+(-0.1+(0.1-(-0.1))).*rand(N,1));
[Hs,Ts,Hz,Tz,Hrms,H,T]=wavefromsurfaceelevzcross(Eta,fs,'yes');