“…In recent years, X-band marine radars have been utilized to measure spectral wave parameters (Nieto-Borge et al, 1999), wave groups (Dankert et al, 2003), individual waves (Dankert and Rosenthal, 2004;Nieto-Borge et al, 2004), surface currents (Senet et al, 2001;Huang et al, 2016), bathymetry (Senet et al, 2008;Bell and Osler, 2011) as well as surface winds (Dankert and Horstmann, 2007;VicenBueno et al, 2013). However, to retrieve significant wave heights, the relative radar image spectrum has to be transferred to a real wave amplitude spectrum using a modulation transfer function (Nieto-Borge et al, 1999).…”