Mike Lanzone, CEO of Cellular Tracking Technologies, talks about what drove the development of lightweight GPS+GSM transmitters. Wildlife biologists researching potential conflicts with wind power turbines in Pennsylvania, USA, and curious about the origin and destination of Eastern Golden Eagles compelled Mike and his colleagues to develop something better than satellite technology. The resulting high-frequency of location points gave a far better data set, allowing the researchers to better describe flight behavior in the area of the wind farm.