This Quill mission was the first radar reconnaissance sat developed by the NRO in the P-40 synthetic aperture radar (SAR) proof-of-concept program. December 21, 1964 at 19:08 UTC · Launch Successful Thor SLV-2A Agena D — United States Air Force, to Low Earth Orbit Space Launch Complex 2E, Vandenberg SFB, CA, USA The world's 393rd orbital launch attempt, and 100th of 1964. Data: Launch Library 2, The Space Devs. Image via The Space Devs.