On the discrimination of extreme waves and outliers measured by in Situ wave gauges: first approaches and results

In situ sea state measurements are essential for offshore activities, coastal protection and science (here in example for the validation of numerical models and of earthor satellite-based remote sensing instruments). Therefore, well quality checked data is a must. Up to now it is difficult to discriminate between outliers and extreme waves in raw surface wave displacement time series. A consequence of this fact is the uncertainty of the correctness of the maximum wave height in a time period and of extreme waves at all. A first approach method has been developed considering some physically motivated singlewave features. Aim of the development in progress is a fully automated procedure to ensure the sea state time series quality in regard of the discrimination of outliers and extreme waves; in consequence this could also increase the reliability of in situ extreme wave statistics.