science · 13 April 1960 · 64 years ago
In 1960, the first U.S. navigational satellite, the Transit-1B was launched from cape Canaveral, Florida on a Thor-Ablestar rocket and the Ablestar carried out the first engine restart in space to refine the orbit.. The payload, weighing 265 pounds, included 2 ultrastable oscillators, 2 telemetry transmitters and receivers, batteries and solar cells. The Transit system was designed to meet Navy's need for accurately locating ballistic missile submarines and other ships. It achieved initial operational capability in 1964 and full capability in Oct 1968. Its navigational broadcasts were switched off deliberately on 31 Dec 1996. The Joint Chiefs of Staff had decided to rely on GPS alone for navigation and positioning, retired after more than 32 years of continuous, successful service to the U.S. Navy.
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