Friday, April 14, 2017

Test inflation of the 100 ft. diameter PAGEOS satellite in a blimp hangar (1966). Once in orbit, it was tracked visually as part of an early experiment in global positioning. Sightings of the balloon satellite were used to pinpoint a position on the earth's surface to within 96 feet. [2400 × 2400]


http://bit.ly/2phn4Mw via /r/spaceporn http://bit.ly/2pegM35