Jul 12 1961
From The Space Library
NASA Tiros III weather satellite successfully launched into near-circular orbit by Thor-Delta from Cape Canaveral.
Midas III (missile defense alarm system) launched into polar orbit from Pacific Missile Range, with record 1,850-mile-high orbit and was heaviest U.S. satellite launched to date. Second-stage Agena B was restarted at apogee of first orbit.
Jet Propulsion Laboratory announced that construction was underway on the first large space simulator in the United States capable of testing full-scale spacecraft of the Ranger and Mariner classes with the three primary space effects—solar radiation, cold space heat sink, and a high vacuum equivalent to about one part in a billion (1: 1,000,000,000) of the atmospheric pressure on the Earth.
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