Abstract
Short‐range SUS reverberation data collected during the CEAREX 89 experiment in the Norwegian/Greenland Sea are analyzed to extract under‐ice and bottom backscattering strengths from direct‐path measurements. Because of the mildly bistatic experimental geometry, propagation paths with different grazing angles contribute to the reverberation at the same time; therefore, a least‐squares method is used to recover the angular dependence of backscattering strength. Ice backscattering strengths are compared with the results of Milne, while bottom backscattering strengths are compared with results for similar ocean bottoms. [Work supported by ONR arctic sciences program.]
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