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1. (WO2017062866) ACOUSTIC RANGING APPARATUS AND METHODS

Pub. No.:    WO/2017/062866    International Application No.:    PCT/US2016/056129
Publication Date: Fri Apr 14 01:59:59 CEST 2017 International Filing Date: Sat Oct 08 01:59:59 CEST 2016
IPC: G01V 1/38
Applicants: ION GEOPHYSICAL CORPORATION
Inventors: GUILLOT III, Clement B.
Title: ACOUSTIC RANGING APPARATUS AND METHODS
Abstract:
A ranging system comprises a plurality of streamers, each with a plurality of receivers. A plurality of transmitters is also disposed along one or more of the streamers, each configured to generate acoustic or ranging signals over one or more channels. A processor is configured to define a subset of the transmitters within a predefined limited range or listening distance of each receiver. In the subset, the transmitters are configured to generate the acoustic signals over different channels.