OPTIMIZING PRESENTATION OF GPR DATA COLLECTED AT MULTIPLE FREQUENCIES

In recent years, commercial ground penetrating radar (GPR) systems have been developed that permit simultaneously acquisition of data with antennas at different frequencies. Acquiring data at multiple frequencies is useful because higher-frequency profiles have better spatial resolution, but suffer from reduced depth penetration. Lower frequencies can generally resolve to greater depths, but at the cost of spatial resolution. For concise presentation of GPR data, it would be useful to combine the best features of each profile into a common image or data set. This study explores ways effective ways to present GPR data acquired at multiple frequencies, through filtering and merging of coincident data sets. Examples will be shown from GPR surveys in volcanic tephra deposits, hurricane washover deposits on barrier islands, and over sinkholes in covered karst terrain.