![]() ![]() The reflection coefficient of sea water is close to -1 for microwave frequencies and at low grazing angles.įor smooth seas, the wave height is small, and the sea appears as an infinite, flat conductive plate with little-to-no backscatter. ![]() The sea surface is composed of water with an average salinity of about 35 parts per thousand. Furthermore, as you will see, radar returns from a sea surface exhibit strong dependence on sea state. The physical properties you introduce is an important part in developing the geometry and environment of the maritime scenario. This is a result of the wavelength and wave height increasing with wind speed, albeit with different factors. Note the slow increase in the wave slope β 0 with sea state. Using the searoughness function, plot the sea properties for sea states 1 through 5. ![]() Wave heights at a sea state of 8 can be greater than 9 meters or more. The scale then proceeds from a slightly rippled sea state at 1 to rough seas with high wave heights at sea state 5. At the lower end of the scale, a sea state of 0 represents a calm, glassy sea state. The Douglas sea state number is a widely used scale that represents a wide range of physical sea properties such as wave heights and associated wind velocities. The wave height is defined as the vertical distance between the wave crest and the adjacent wave trough.ĭue to the irregularity of waves, the physical properties of the sea are often described in terms of sea states. Σ h is the standard deviation of the wave height. ![]()
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