At sites ranging from the exotic to the mundane-including this mountainous station in New Zealand--researchers track the motion of the earth's crust via satellite signals. UCAR and collaborating institutions have used the satellite-based Global Positioning System to study geologic features. UCAR is also a leader in the application of GPS-based tools to infer the state of the atmosphere between the satellite signals and the earth's surface. Pictured: UCAR's Barbara Perin (left) and New Zealand colleagues Peter Otway (center) and Graeme Blick of the Crown Research Institute.
