The GOES-R and GOES-S launch vehicle is an Atlas V 541 expendable launch vehicle (ELV). The term expendable launch vehicle means each vehicle is only used once. The three numbers in the 541 designation signify a payload fairing, or nose cone, that is approximately 5 meters (16.4 feet) in diameter; four solid-rocket boosters fastened alongside the central common core booster; and a one-engine Centaur upper stage.
GOES-R launched aboard an Atlas V 541 rocket from Space Launch Complex-41 at Cape Canaveral Air Force Station, Florida, on November 19, 2016. GOES-S will also utilize an Atlas V 541 for launch in 2018.
A launch vehicle is chosen based on how much mass the vehicle can lift into space. A two-stage Atlas V 541 launch vehicle was selected for the GOES-R and S launches because it has the right liftoff capability for the heavy weight requirements.
NASA Kennedy Space Center awarded the launch services contract for the GOES-R and GOES-S satellite missions to United Launch Alliance of Centennial, Colorado, in April 2012.
|Stage 1: Atlas V Rocket: Fuel and oxygen tanks that feed an engine for the ascent; powers spacecraft into Earth orbit.|
|Solid Rocket Motors: Used to increase engine thrust; four total.|
|Stage 2: Centaur: Fuel and oxidizer and the vehicle's "brains"; fires twice, once to insert the vehicle-spacecraft stack into low Earth orbit.|
|Payload Fairing: Thin composite or nose cone to protect the spacecraft during the ascent through Earth's atmosphere.|