Patent ID: 9405031
Filing Date: 2016-08-02
CPC Classification: G01V

Claim Text:
1. A method for mapping geological structures of a formation on one side of a surface using an airborne and moving measuring equipment on the other side of the surface, the method comprising a sequence lasting a sequence period and comprising at least one moment period with: an on-period where a magnetic field is built up in the formation by generating a magnetic moment, which magnetic moment has a moment strength and is generated using at least one magnetic moment generator, on the other side of the surface at a position, which on-period is separated from an off-period by a step where the magnetic field is brought to change by changing the magnetic moment; the off-period where at a recording time t wherein the method performs at least two sequences, each of the at least two sequences being performed with at least two magnetic moments wherein; wherein, in respect of each of the at least two sequences, the at least two magnetic moments have wherein the sequence periods of the at least two sequences have a duration that is less than 1 second; and wherein in respect of the each of the at least two sequences, the at least two magnetic moments have respective maximum moment strengths, and wherein absolute values of the respective maximum moment strengths are different.