Radar Studies of the Sea Surface - An Introduction
A variety of different radars have been used to observe the sea surface. The instruments include scatterometers to measure wind velocity, altimeters to measure wind speed and wave height, synthetic-aperture radars (SAR) to map the radar reflectivity of the surface in order to see ocean surface waves and other phenomena, and two-frequency radars to measure ocean wavelength (Table 1). Each radar was designed to measure a particular variable. Each evolved independently, yet all are essentially wideband super-high-frequency radars that respond in similar ways to surface roughness, and all use the observation of surface roughness to measure some desired or useful surface variable.
KeywordsWind Speed Wave Height Significant Wave Height Scattering Cross Section Radar Reflectivity
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