These techniques make use of a transmitter that induces electrical current flow in the ground, and a receiver that measures the electromagnetic (EM) field produced by these induced currents.
(These techniques; make; use of a transmitter) (a transmitter; induces; electrical current flow in the ground) (a receiver; measures; the electromagnetic (EM) field) (the electromagnetic (EM) field; produced; by these induced currents)
These techniques a transmitter a receiver the electromagnetic (EM) field
make induces measures produced
use of a transmitter
electrical current flow in the ground
the electromagnetic (EM) field
by these induced currents