DHRPGE is a contactless pulsed geoelectrical exploration technology based on a modification of GPR that uses an ultra-wideband electromagnetic signal in the range of 1-1000 MHz for sounding soils, and antennas in the form of resistive-loaded dipoles. Depending on the tasks and the required depth, antennas of various lengths are used.

The technology is based on registration of reflected electromagnetic waves from subsurface with different geoelectric parameters. These parameters are closely correlated with the physical properties of geological elements: density, porosity, moisture content, and others. The main information about geological structures is the amplitude of the pulse reflected from the interface, its shape, polarity and the time interval between the generation of the pulse by the transmitter and the registration by the receiver of signals reflected from the sections of geological media. During exploration, the GPR moves along the profile between physical measurement points with a specified step or with continuous shooting along the horizon. Modern GNSS equipment is used to bring the profiles to the terrain.

The signal source generator has the ability to adjust the power for surveys at different depths and generates a nanosecond pulse (unipolar pulse without high-frequency filling) with a steep leading edge. The steep leading edge of the pulse and its large amplitude determine the high resolution of the technology, the large depth of sounding, and the ability to work in low-resistance environments – like wet soils, clays and loams.

The result of the exploration is a geoelectric section (radargram), translated into a depth scale. The translation is carried out based on the results of field calibration and reference to existing geological wells, archival data of engineering and geological surveys. The results of impulse electrical exploration can be compared with the results of seismic exploration and classical geoelectrical exploration.