A frame body is provided parallel to and proximate with a surface of a structure and extends substantially horizontally from a first side to a second side. A connecting portion is provided to be attached to a cable to provide for vertical movement of the frame body. A robotic arm is affixed proximate to a bottom of the frame body and is able to move horizontally during penetrative imaging of the surface. Moreover, the robotic arm extends to an end proximate with the surface, and a penetrative imaging portion is attached to the robotic arm near the end proximate with the surface. The robotic arm rotates, vertically moving the penetrative imaging portion during penetrative imaging of the surface. In addition, the penetrative imaging portion can be separately rotated about three orthogonal axes of rotation (yaw, pitch, roll) to achieve various angles of approach and orientation to the surface.