EFFECT OF SHOT INTERVAL ON OCEAN-BOTTOM SEISMOGRAPH AND HYDROPHONE DATA

Data collected by 18 ocean bottom receivers for a seismic line shot at both 50-m (similar to 24 s shot interval) and 125-m (similar to 58 s shot interval) shot spacing provide a direct field comparison of the e ffect of shot interval on marine wide-angle seismic data. Our results indicate that both shot spacings produce high-quality refraction data in shallow water (<1000 m) on hydrophone and vertical channel data. In deeper water, the data quality of the 50-m line is adequate for the v ertical channel, but it is often poor at large offsets for the hydroph one channel in comparison to the 125-m shot spacing data. A theoretica l model to explain these observations provides further information use ful for designing an experiment using ocean-bottom receivers.