PAGEOS (PAssive Geodetic Earth Orbiting Satellite) 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 as a reflective and photographic tracking target.
PAGEOS (PAssive Geodetic Earth Orbiting Satellite) 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 as a reflective and photographic tracking target.
Source: Wikipedia "PAGEOS" · CC BY-SA 4.0
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