Reproducibility of Reflections from the Bottom of the Ocean.

摘要

The signals reflected by the bottom of the ocean are complex and dependent upon the location. Seismic profiling data were taken in typically smooth and rough areas. The similarity of reflection signals as a function of the ship's position was studied for the areas. A portion of the reflection signal for a transmission was stored in a Deltic memory. The cross correlation of reflection signals from subsequent transmissions and the stored signal was measured. In smooth areas the correlation of subsequent transmissions with the reference was about the same as the autocorrelation for over 0.5 nm translations. In rough areas, the correlations of the reference and subsequent transmissions were very small. (Author)