The Inertial Upper Stage (IUS), originally designated the Interim Upper Stage, was a two-stage solid-fueled rocket upper stage developed by Boeing for the United States Air Force beginning in 1976 for raising payloads from low Earth orbit to higher orbits or interplanetary trajectories following launch aboard a Titan 34D or Titan IV rocket, or fro...
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http://en.wikipedia.org/wiki/Inertial_Upper_Stage
(from the article `Boeing Company`) ...astronauts to the Moon and the battery-powered Lunar Roving Vehicles used in the Apollo 15, 16, and 17 missions. In 1976 it entered the ...
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http://www.britannica.com/eb/a-z/i/20
(IUS) A two-stage solid-rocket motor used to boost heavy satellites out of low Earth orbit into a higher orbit. It can be used in conjunction with both the Space Shuttle and Titan.
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http://www.daviddarling.info/encyclopedia/I/IUS.html
a U.S. two-stage, solid-propellant rocket used to boost a relatively heavy spacecraft from a low earth orbit into a planetary trajectory or an elliptical transfer orbit. Abbr.: IUS Cf. payload assist module.
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https://www.infoplease.com/dictionary/inertial-upper-stage
No exact match found.
