sjb (10/30/82)
The Inertial Upper Stage booster, designed to lift payloads carried up in the shuttle into higher orbits, will get its first real workout tomorrow. Two satellites, DSCS Phases II and III, launched at 1205 EDT today by the new Titan booster, are now in a 95 to 120 miles orbit around the Earth. Tomorrow, their IUS's will ignite and, if they work, will carry them up to geosynchronous orbits.