sentences:  SAGE data was switched to DC-10 at Duluth AFS, Minnesota in 1963.The radar squadron provided information 24/7 the SAGE Direction Center where it was analyzed to determine range, direction altitude speed and whether or not aircraft were friendly or hostile.In 1962 Finley operated an AN/FPS-35 search radar plus AN/FPS-6 and AN/FPS-90 height-finder radars.