
GBG Australia undertook a Non-Destructive investigation to locate voiding and services in southern Queensland. During the survey a range of antennas were used, including a 400MHz and a 200MHz Antenna. The purpose for the survey was to supply accurate information on the location of voiding and services beneath the road.
Figure 1: Site View.
Figure 2: The 400MHz and the 200Mhz antenna being towed by a vehicle for the longitudinal lines.
Figure 3: The 400MHz antenna being pushed in the cart for the transverse lines.
Figure 4: The 200MHz antenna being pulled over the transverse lines.