Radio Readings Pinpoint Pluto for New Horizons Probe

Radio readings from an array of antennas in Chile are helping the scientists behind NASA's New Horizons mission to Pluto determine the dwarf planet's precise position — so that the spacecraft can zero in properly during next July's flyby

Article: http://www.nbcnews.com/science/space/radio-readings-pinpoint-pluto-new-horizons-probe-n173641