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Inflation test of the PAGEOS inflatable satellite

Inflation test of the PAGEOS inflatable satellite

S750/0112

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Credit

NASA / SCIENCE PHOTO LIBRARY NASA / SCIENCE PHOTO LIBRARY

Caption

PAGEOS satellite. Inflation test of the Passive Geodetic Satellite (PAGEOS) before its launch. It was used in a geodetic experiment to determine the Earth's shape. It was launched on 24 June 1966 into a circular, polar orbit at an altitude of 4160 kilometres (km). Its 30-metre diameter infla- table reflective sphere made it appear as a point of light in the sky. As it orbited, cameras on the ground simultaneously photographed it against a star background from some of the stations in a worldwide network of 41 sites. By comparing the images, the position of cameras in two stations 4800 km apart could be determined to within 11 metres. PAGEOS slowly broke up during 1975-78.

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