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Ron Ondrejka gave an amazing presentation at Where 2.0. Ron was Project Photogrammetrist for the imaging and mapping systems on CORONA, LANYARD, and KH-9 “Big Bird” (MAPPER). 1960-1983. His presentation had early imaging satellites with emphasis on their contributions to mapping and targeting. They didn’t use computers for the spacecraft or payload design of CORONA, for navigation and commands, or for the early years of producing maps. Link.