Patent ID: 8810248
Filing Date: 2014-08-19
Classification: G01V,Y02A

Abstract:
1. A method of testing the electric field recording of a marine electromagnetic sensor cable including electrodes, the method comprising: causing time varying current to flow between at least a first pair of current electrodes disposed along the marine electromagnetic sensor cable, said flow of current generating a voltage in a body of water; modulating the current flowing between the at least a first pair of current electrodes; measuring a series of potential differences between a pair of sensor electrodes while modulating the current flowing between the at least a first pair of current electrodes, wherein the proximity of the at least a first pair of current electrodes to the pair of sensor electrodes is selected such that the measured series of potential differences only includes direct coupling effects to the water body and/or water bottom; and inferring accuracy of the electric field recording from the series of measured potential difference.