PAGEOS
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PAGEOS was a balloon satellite which was launched by NASA in June 1966. It was the first satellite specifically launched for use in geodetic surveying, or measuring the shape of the earth, by serving
Test inflation of PAGEOS, 5 August 1965
Network of BC4 cameras used to establish the Worldwide Geometric Satellite Triangulation Network
A BC4 (Ballistic Camera-4) camera, inside its observing dome, with instrumentation shelter in background.
Project Echo
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Project Echo was a passive communications satellite experiment designed by the American National Aeronautics and Space Agency as the first test of man-made satellite communication in history. Each of
PAGEOS
…attractive after Sputnik launched in the Cold War, resulting in a program of similar, larger satellites. These included satellites Echo 1 and Echo 2 under Project Echo, which were also used for experiments in geodetic surveying; several air-density-focused Explorer satellites; and finally PAGEOS. PAGEOS had a diameter…
Echo 1 sits fully inflated at a Navy hangar in Weeksville, North Carolina.
Echo 2
Scale prototype of the Echo satellites undergoing a skin stress test on 1 May 1960.
Holmdel Horn Antenna, constructed for Project Echo, and later used to discover the cosmic microwave background radiation.