Ground penetrating radar (GPR) is a geophysical
technique that uses electromagnetic waves in the radio frequency range
to investigate geologic, engineering and hydrogeologic features. Radar
waves are produced by a transmit antenna, scattered from interfaces between
media
having contrasting intrinsic impedances, and recorded by a receive
antenna. Electromagnetic waves can be described by the orientation of their
electric and magnetic fields, and the direction of propagation. Polarization
refers to the magnitude and orientation of the electric field as a function
of time and space.
AAPG Search and Discovery Article #90926©1999 AAPG Eastern Section Meeting, Indianapolis, Indiana