PT Freeport Indonesia (PTFI) Geo Services Division recently enhanced the slope monitoring system at Grasberg mine with the purchase of two IBIS-M radars. “Grasberg mine is one of the few mines in the world that utilises very high-technology monitoring equipment to help detect slope movements. The IBIS-M radars are top-of-the-line radars, using technology that is accurate to within approximately 0.1 mm, with coverage at some 2 km an area around 5 km square, and operating range of 10 m to 4,000 m,” explained PTFI Superintendent - Geotechnical Pit Engineering and Stability Rahadian Widiadi.