Cape Canaveral Air Force Station, Fla., (Jan. 19, 2018) – A United Launch Alliance (ULA) Atlas V rocket carrying the Space Based Infrared System (SBIRS) GEO Flight 4 mission lifted off from Space Launch Complex-41 on Jan. 19 at 7:48 p.m. EST. SBIRS is considered one of the nation’s highest priority space programs, and is designed to provide global, persistent, infrared surveillance capabilities to meet 21st century demands.
“Meeting the challenge of launching two critical national security missions from opposite coasts within a week, the entire ULA team once again demonstrated its unwavering dedication to 100% mission success,” said Laura Maginnis, ULA vice president of Government Satellite Launch. “Thank you to our U.S. Air Force and industry teammates for their outstanding partnership in successfully delivering SBIRS to orbit today.”
This mission was launched aboard an Atlas V Evolved Expendable Launch Vehicle (EELV) 411 configuration vehicle, which includes a 4-meter Payload Fairing (PLF). The Atlas booster for this mission was powered by the RD AMROSS RD-180 engine. Aerojet Rocketdyne provided the AJ-60A solid rocket booster (SRB) and RL10C-1 engine for the Centaur upper stage.
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 Launches SBIRS GEO Flight 4 Mission for the U.S. Air Force){kind=link}