By AvatarNemo
1960-1969
Project Echo, a telecommunications satelloon
“Project Echo was the first passive communications satellite experiment. Each of the two American spacecraft, launched in 1960 and 1964, was a metalized balloon satellite acting as a passive reflector of microwave signals. Communication signals were bounced off them from one point on Earth to another.”
Source: <a class="colorbox" href="http://feedproxy.google.com/~r/Tumblr-AvatarNemo/~3/xnIWgzzQ-_I/71535477057" title="1960-1969
Project Echo, a telecommunications…”>@ Tumblr
Source: @ Tumblr
