United Launch Alliance is set to launch an Atlas V rocket from Cape Canaveral Air Force Sattion on Thursday.
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The rocket will be carrying the fourth Space Based Infrared System GEO satellite into orbit for the U.S. Air Force.
The SBIRS GEO Flight-4 satellite is designed to detect missiles for the U.S. military.
It will join a network of three other SBIRS satellites.
The satellite was built by Lockheed Martin in California before being shipped to the Space Coast in October.
The 40-minute launch window opens at 7:52 p.m.