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Receiver coil assembly with air and ferromagnetic cored sensors for geophysical surveying

  • US 9,372,275 B2
  • Filed: 05/17/2012
  • Issued: 06/21/2016
  • Est. Priority Date: 11/27/2009
  • Status: Active Grant
First Claim
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1. A receiver coil assembly for towing by an aircraft for performing geophysical surveys, comprising a semi-rigid outer shell having a nominally vertical extent which is substantially less than an horizontal extent thereof, the outer shell housing a multiturn air core receiver coil and at least one solenoid receiver coil, each receiver coil sensing changes in a different magnetic field component and having an axis at a known angle to the axis of the other receiver coil, wherein the multiturn air core receiver coil has a nominally vertical axis and the solenoid receiver coil comprises a multiturn solenoid winding with a ferromagnetic core and has a horizontal axis.

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