objects while simultaneously measuring the distance between the dgm detection array and the object axial orientation apparent magnetic mass and magnetic moment the dgm employs a signal processing technique to nullify source noise from the earth 39 s magnetic field external radio frequency transmissions and electromagnetic noise a linear geometric architecture comprising a plurality of magnetometers forming the array enables the dgm to collect information directly in the spatial domain the dgm is capable of capturing the complete field anomaly contour in three dimensions while the array traverses over under or adjacent to an object application_number US 53640409 A description it will be appreciated by those of ordinary skill in the art that the invention can be embodied in other specific forms without departing from the spirit or essential character thereof the presently disclosed embodiments are therefore considered in all respects to be illustrative and not restrictive fig1 depicts an exemplary dgm system depending on how the dgm is tasked other complete system configurations are possible this example is provided as a means to explain how the dgm array and the signal processing algorithms integrate into a functional system for magnetometry survey surveillance and or inspection function the array is a linear arrangement of a plurality of magnetic sensors or magnetometers in fig1 two arrays 100 are shown to demonstrate that it can be interfaced with a central electronics unit 101 by means of electric conducting or fiber optic cabling 111 or by radio transmission telemetry 112 via a transmitter 107 and receiver 106 a speaker headphone or earpiece 108 can be provided as a means to alert the operator to.