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Radar Course I
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3. ERS SAR geometric configuration
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The SAR measures the power of the reflected signal, which determines the brightness of each picture element (pixel) in the image. Different surface features exhibit different scattering characteristics:
Urban areas: very strong backscatter
Forest: medium backscatter
Calm water: smooth surface, low backscatter
Rough sea: increased backscatter due to wind and current effects

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry