Recent advances in subsurface radar technology

Recent advances in subsurface interface radar technology. Geological Survey ojFinland, Special Paper 16, 13-19,5 figures. The acceptance and use of Subsurface Interface Radar (SIR) has increased dramatically over the last five years. During this period, the number of SIR Systems in use worldwide has nearly quadrupled. New and increasingly diverse applications are putting demands on manufacturers to produce systems that can satisfy the growing range of resolution and penetration requirements. Systems must be more flexible yet simple to use and lower in cost.