Abstract: An induced polarization (IP) data acquisition system includes a plurality of linearly spaced apart measurement nodes or obtaining synchronized measurement signals indicative of the electric field strength at a corresponding plurality of spaced apart locations at or adjacent to a surface of a first geological body. A reference node obtains reference signals indicative of the magnetic field strength at a location at or adjacent to a surface of a second geological body that is spaced apart from body. The reference signals are synchronized with the measurement signals. A processing center is responsive to the measurement signals and the reference signals for deriving a transfer function for body. System is configured for deriving survey data that is indicative of one or more geophysical properties of a body and use is made of the transfer function referred to above to more accurately derive the survey data.

Abstract: An induced polarization (IP) data acquisition system includes a plurality of linearly spaced apart measurement nodes or obtaining synchronized measurement signals indicative of the electric field strength at a corresponding plurality of spaced apart locations at or adjacent to a surface of a first geological body. A reference node obtains reference signals indicative of the magnetic field strength at a location at or adjacent to a surface of a second geological body that is spaced apart from body. The reference signals are synchronized with the measurement signals. A processing center is responsive to the measurement signals and the reference signals for deriving a transfer function for body. System is configured for deriving survey data that is indicative of one or more geophysical properties of a body and use is made of the transfer function referred to above to more accurately derive the survey data.

Abstract: A geological data acquisition system (1) for obtaining data from a geological body (2). System (1) includes a plurality of nodes (3) for simultaneously obtaining respective first measurement signals representative of predetermined characteristics of body (2) at a corresponding plurality of equally spaced apart locations adjacent to the top surface (4) of body (2). First memory means (5) are disposed at each node (3) for selectively storing first data representative of the first measurement signals. A processing center (7) is remote from nodes (3) and selectively obtaining the first data from each memory means (5).