eta_kA021A00.dat consist of a matrix 11520x65
kA = 0.21; A = 0.094 m; Tp = 1.33 s; incident wave angle = 0 deg
"eta0, eta90, eta180 & eta270 are the measured water elevations for the tests with the focused wave groups generated from the same wave amplitude components but with the phase of each Fourier component shifted 0 deg, 90 deg, 180 deg and 270 deg respectively."
The order of the columns: 
Column 1 = time history in second
Column 2 to 5: eta measured without models at location WG4
Column 6 to 9: eta measured with Model 1 at location WG4
Column 10 to 13: eta measured with Model 2 at location WG4
Column 14 to 17: eta measured with Model 3 at location WG4
Column 18 to 21: eta measured without models at location WG8
Column 22 to 25: eta measured with Model 1 at location WG8
Column 26 to 29: eta measured with Model 2 at location WG8
Column 30 to 33: eta measured with Model 3 at location WG8
Column 34 to 37: eta measured without models at location WG10
Column 38 to 41: eta measured with Model 1 at location WG10
Column 42 to 45 eta measured with Model 2 at location WG10
Column 46 to 49: eta measured with Model 3 at location WG10
Column 50 to 53: eta measured without models at location WG22
Column 54 to 57: eta measured with Model 1 at location WG22
Column 58 to 61 eta measured with Model 2 at location WG22
Column 62 to 65: eta measured with Model 3 at location WG22