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.