Here's your mission, should you choose to accept it: build a camera that can take high-resolution photographs of the Earth from orbit and return them to the Central Intelligence Agency. There's only one catch: you don't get to use a computer or a single kilobyte of network bandwidth.
That's the task that the United States government gave to a group of engineers at the optical instruments company Perkin-Elmer in Danbury, Connecticut at the height of the Cold War. It was October 1966 and the new development of the new satellite system, Hexagon, was underway. The project was a follow-on to very successful Corona satellite program and a complement to the higher-resolution Gambit satellite.
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