Determination of the significant wave height from shadowing in synthetic radar images

High waves in Draupner seas—Part 2: Observation and prediction from synthetic radar images

“…Therefore, radar images of a sea state give only a very poor representation of the sea. In Wijaya and Van Groesen (2016), it was shown that the amount of shadowing with increasing distance from the radar can be used to characterize the significant wave height directly from the images without any empirical constants or further external information, but here we will use the a priori information about the significant wave height.…”

Freak wave

“…The potential of using satellites for global surveillance of the worlds oceans is considerable, and even if it turns out to be difficult or even impossible to map the surface elevation by the satellite data, it may be possible to develop some extreme wave signatures from the radar data [Dysthe et al, 2008]. Recent studies by Wijaya et al [2015], Wijaya and van Groesen [2016] discussed sea surface elevation reconstruction from marine radar data.…”

Reconstruction and deterministic prediction of ocean waves from synthetic radar images

“…Chapter 3: Determination of the significant wave height from shadowing in synthetic radar images This chapter has been published as Wijaya and van Groesen [2016] which proposes a method to determine the significant wave height based on shadowing from radar 1.3 Outline of the dissertation 13…”

“…Recent investigations showed that this information can actually also be extracted from the geometric images, see Wijaya and van Groesen [2016]. Practical applicability requires the application of the full simulation scenario to real radar images and to test the results against accurate measurements.…”

“…Buckley and Aler [1998b] and Gangeskar [2014]. We will not address this topic here, but refer to a forthcoming publication of Wijaya and van Groesen [2016] that derives the significant wave height from the shadowed images without any calibration. In this paper it is assumed that the significant wave height is known, either from existing analysis techniques of radar images or by means of a reference observation such as a wave buoy or recorded ship motions.…”