Patent ID: 8134369
Filing Date: 2012-03-13
Classification: G01V,Y02A

Abstract:
1. A method of testing electric field recording in a body of water, the method comprising: (a) arranging a marine electromagnetic sensor cable having a plurality of measurement electrodes disposed thereon in the body of water; (b) forming a first conductive path including a volume of the body of water between a pair of test electrodes; (c) forming a second conductive path including at least one resistor between a segment of the marine electromagnetic sensor cable and the pair of test electrodes; (d) generating a voltage drop along the segment of the marine electromagnetic sensor cable that causes current to flow between the pair of test electrodes along the first conductive path; (e) measuring a potential difference between a selected pair of the measurement electrodes, the selected pair of the measurement electrodes being disposed relative to the pair of test electrodes such that the measured potential difference is responsive to the flow of current along the first conductive path; and (f) determining an electric field recording of the selected pair of the measurement electrodes in the body of water from the measured potential difference.