| 摘要 |
Each data acquisition unit (1) has a pointed head (2) designed to carry it down under gravity. On reaching the (e.g. sea) bed, it penetrates it, closely coupling the seismic receivers to the subterranean formation. The equipment includes an acoustic reference system, for acoustic location of each unit (1) on the bed. Optical or acoustic data transmission equipment is employed. This connects the sea bed units through a mobile signal interception assembly, to central apparatus An Independent claim is included for the corresponding method of seismic exploration by deployment and use of the above equipment. An immersed seismic source emits waves to be reflected by discontinuities in subterranean formations, which are picked up by the sinker units. Preferred Features: Acoustic positioning employs an acoustic transponder in each unit (1). A short acoustic base on a vehicle (e.g. ship) with GPS system, is used for unit location. An acoustic transponder is included in each unit. The acoustic base may comprise a number of buoys at the surface, in combination with satellite positioning. Seismic data transmitters on the units and the ship, provide data communication between them.
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