AIRCRAFT VERSION OF THE COMPLEX SUBSURFACE ELECTROMAGNETIC PULSE ULTRAWIDEBAND SENSING
 

Vladimir B. Boltintsev

JSC APF "Geodizond", St. - Petersburg 

Received September 19, 2012

Abstract. The results of flight and design tests of aircraft version of the subsurface electromagnetic impulse (EMI) ultra wideband (UWB) sounding complex are presented in article. The aerial version of the complex differs from the ground version a new geometry of antennas and a record of a signal on the computer. The results of airborne method of measurements of radiation patterns (RP) of the ground complex of subsurface UWB sounding are   presented too. By means of the example of the concrete flight it is shown that the deep of distribution of a signal is caused by use of Drift Step Recovery Diodes (DSRD) generator as source of a radiated signal and the strong low-frequency dispersion which was showed in the reflected signal of dielectric permeability of the environment. The flight on the route on which land measurements were carried out was made during the flight and design tests. The way of comparison established basic compliance between ground and aerial EMI UWB measurements. The efficiency of application of the onboard EMI UWB measurements is confirmed with identification of existence of low-frequency dispersion of dielectric permeability of the damp soil received during flight at the delta of the Neva River.

Keywords: Ultra Wide band - UWB; DSRD (Drift Step Recovery Diodes); underground radar measurements.