Development and preliminary test of a 1000‐Hertz pulse compression seismic reflection profiling system

A continuous seismic reflection profiling system was developed to achieve acoustic penetration into sea floor sediments between that achieved by air guns and by 3500-Hz systems in all water depths at ship cruising speeds. The system utilizes a multiple-bit correlator to compress a 1000-Hz chirp signal of low amplitude and long duration into a signal of high amplitude and short duration, thereby significantly increasing the signal-to-noise ratio without loss of time resolution. The results of a field test demonstrate the feasibility of such a system.