US Radar, in conjunction with Subsurface Imaging Systems, is a technological leader in the design and innovation of surface and ground penetrating radar (GPR) systems and a prominent manufacturer of Surface Penetrating Radar (SPR) systems. For more information, contact US Radar, PO Box 319, Matawan, NJ 07747, call 732-566-2035, e-mail info@usradar.com, or visit the Web site at www.usradar.com.