Abstract
During April 1968 the Naval Oceanographic Office conducted an air-borne side-looking radar experiment over the sea ice fields north of Alaska using the four-frequency radar system of the Naval Research Laboratory. The shorter-wavelength X band radar appears to have the greatest potential for sea ice study when more definitive information is required, such as mapping, distributions of stages of ice development, and fracture pattern analysis. Pressure ridge patterns can sometimes be identified when they are present on a low-backscatter background. The L band radar has potential value for mapping the areal distribution for surface topography. This wavelength does not receive discriminative backscatter from various ice types but sees only the more prominent topographic features, such as ridges and hummocks. The P band does not appear to have any characteristics that would make it valuable for sea ice mapping. Only the most prominent features, such as large fractures and floes, were imaged by this radar.
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