Electromagnetic survey system with multiple sources

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – For small object detection or location

Reexamination Certificate

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C324S326000, C324S337000, C324S354000

Reexamination Certificate

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07411399

ABSTRACT:
Multiple sources are provided for a transmitter cable for use in electromagnetic surveying. The transmitter cable includes a dipole antenna comprising a pair of spaced apart electrodes mounted on their respective cables. Two antennas may be powered from each source. Alternatively, the outputs of each source are connected to a common antenna pair. A single large power supply may be mounted on a vessel to supply power through the tow cable. Alternatively, a number of power supplies may be provided aboard the vessel, with each power supply having dedicated conductors through the tow cable to power the plurality of current sources.

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