Features of using the smoothed instantaneous wave energy history (SIWEH) to analyze the group structure of sea waves

The methodological features of determining the characteristics wave groups sea surface waves based on function smoothed instantaneous through energy (SIWEH) are analyzed. analysis is carried out by numerical simulation an analytical model group structure waves. It shown that when grouping investigated using SIWEH function, it advisable to calculate Groupiness Factors Height (GFH) in two stages. At first stage, transform into a envelope, and at second GFH known envelope. previously proposed direct calculation leads significant errors. effect change cutoff frequency Bartlett filter fixed dominant calculated values investigated. changes ±30%, do not exceed 5%.