Abstract
During the FRAM II experiment in the Pole Abyssal Plain of the Eastern Arctic Ocean, an extensive program of refraction shooting was conducted. Multichannel data on an 800 × 800 m hydrophone array and on an ocean bottom seismometer were obtained from shots deployed from a remote camp and by helicopter, at ranges up to 300 km. The multipath of the bottom interacting paths was resolved using high resolution velocity spectra. These spectra were used to determine (i) a crustal model for the seabed at the FRAM II site, (ii) the propagation loss and spreading for both the reflected and refracted bottom interacting paths, and (iii) conversion efficiencies of shear waves identifiable from the OBS. [Work supported by ONR.]
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