CCDs were invented only in the late 1960s. These satellites were flown in the early 1960s. According to Wikipedia (http://en.wikipedia.org/wiki/Charge-coupled

CCDs were invented only in the late 1960s. These satellites were flown in the early 1960s. According to Wikipedia (http://en.wikipedia.org/wiki/Charge-coupled_device#History http://en.wikipedia.org/wiki/Charge-coupled_device#History) the first spy satellite with CCDs was flown in 1976.