польові вимірювання

Electro­mag­ne­tic (EM) met­hods of ge­ophysics al­low to ima­ge the sub­sur­fa­ce con­duc­ti­vity distri­bu­ti­on by analyzing da­ta me­asu­red on the Earth sur­fa­ce. The tran­si­ent electro­mag­ne­tic (TEM) so­un­ding met­hod is a ti­me-do­ma­in control­led so­ur­ce one which uti­li­ze a non-sta­ti­onary tran­si­ent pro­cess of the EM fi­eld de­ca­ying in the con­duc­ti­ve me­di­um due to the step cur­rent ex­ci­ta­ti­on which is descri­bed by the He­avi­si­de functi­on.