Seismic system with ghost and motion rejection

摘要

An uriderwater seismic system for reducing noise due to ghost refledions or motion through the water from seisniic signals. The system inciudes two motion sensors. One sensor has a first response and is sensitive to platform-motion iriduced noise as well as to acoustic waves. The other sensor has a different construction that isolates it from the acoustic waves so that its response is mairily to motion noise. The outputs of the two sensor responses are combiried to remove the effects of motion noise, When further combined with a hydrophone signal, noise due to ghost reflections is reduced.