 Satellite and Missile Observation System Project (SAMOS-E) or "E-6" was a relatively short-lived series of United States visual reconnaissance satellites in the early 1960s.SAMOS was also known by the unclassified terms Program 101 and Program 201.The Air Force program was used as a cover for the initial development of the Central Intelligence Agency's Key Hole (including Corona and Gambit) reconnaissance satellites systems.