초록 ▼

Ocean bottom seismic cables are subject to rolling motions due to seismic wave fields and current action which cause poor receiver ground-coupling and signal distortion, particularly along the cross-line and vertical axes. Two multi-axial receivers are mounted on opposite sides of the cable in a sin

Ocean bottom seismic cables are subject to rolling motions due to seismic wave fields and current action which cause poor receiver ground-coupling and signal distortion, particularly along the cross-line and vertical axes. Two multi-axial receivers are mounted on opposite sides of the cable in a single cluster. When the cable rolls, the axial response of one receiver of the cluster cancels the axial response of the other receiver of that cluster.

대표청구항 ▼

[ What is claimed is:] [1.] A method for manufacturing a seismic cable section having a stress member in combination with a plurality of signal communication channels to form a carcass, the method comprising the steps of:fastening multiple receiver clusters to the carcass at desired intervals, where

[ What is claimed is:] [1.] A method for manufacturing a seismic cable section having a stress member in combination with a plurality of signal communication channels to form a carcass, the method comprising the steps of:fastening multiple receiver clusters to the carcass at desired intervals, wherein each receiver cluster comprises at least two multi-axial, seismic receivers symmetrically disposed around the perimeter of the carcass for receiving seismic data and for generating output signals representing commonly-polarized axes;installing a filter in association with each said receiver cluster for receiving, matching and combining the transfer characteristics of said output signals from commonly-polarized axes of the multi-axis receivers in each cluster;providing a signal-communication channel for introducing the combined output signals from each axis into said selected communication channel.