Wave kinematics computed with the nonlinear schrodinger method for deep water

The nonlinear Schrodinger method for water wave kinematics under two-dimens ional irregular deepwater gravity waves is developed. Its application is il lustrated for computation of the velocity and acceleration fields from the time-series of the surface displacement measured at a fixed horizontal posi tion. The method is based on the assumption that the waves have small steep ness and limited bandwidth.