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| ULA Atlas V | |
|---|---|
| Name | Atlas V |
| Manufacturer | United Launch Alliance |
| Country | United States |
| First flight | 2002 |
| Status | Active |
ULA Atlas V is an expendable launch system developed by Lockheed Martin and operated by United Launch Alliance for a variety of civil, commercial, and national security missions. The vehicle blends heritage from the Atlas (rocket family) and Centaur (rocket stage) with modern manufacturing from Boeing and propulsion supplied by Aerojet Rocketdyne, supporting payloads for customers such as NASA, United States Space Force, National Reconnaissance Office, Commercial satellite operators, and scientific institutions. It has flown from coastal and inland complexes including Cape Canaveral Space Force Station, Vandenberg Space Force Base, and Space Launch Complex 41.
Design work began under Lockheed Martin during the late 1990s as part of a response to shifts in the post-Cold War launch market and procurement reforms initiated by the United States Department of Defense. The Atlas V combines a structurally-stable first stage derived from the historic Atlas-Centaur lineage with the cryogenic second stage Centaur (rocket stage), retaining the pressure-stabilized heritage of earlier Atlas (rocket family) launchers while adopting modern avionics from Honeywell and avionics software practices influenced by NASA missions like Mars Reconnaissance Orbiter and Cassini–Huygens. Development milestones involved static-fire tests at Stennis Space Center and integration of the RD-180 engine produced by NPO Energomash. The program navigated industrial partnerships including Pratt & Whitney, United Technologies Corporation, and the corporate consolidation that produced United Launch Alliance in a joint venture between Lockheed Martin and Boeing.
Atlas V uses a modular naming convention indicating payload fairing size and the number of solid rocket motors sourced from Aerojet Rocketdyne. Configurations range from light to heavy lift, enabling missions for NASA scientific probes, Defense Advanced Research Projects Agency technology demonstrations, and commercial communications satellites such as those built by Boeing Satellite Systems and Lockheed Martin Space Systems. Payload fairings include variants compatible with payloads developed by contractors including Ball Aerospace, Northrop Grumman, and Sierra Nevada Corporation. The platform’s modularity allowed adaptations for high-energy trajectories used by missions like New Horizons, planetary probes akin to Juno, and Earth-observing satellites comparable to Landsat and GOES-R.
The first stage uses the RD-180 engine, a dual-combustion chamber design produced by NPO Energomash under export to the United States, providing high thrust and specific impulse for ascent to low Earth orbit. The second stage Centaur employs RL10 engines developed by Pratt & Whitney with an upper-stage architecture that has been flight-proven on missions for NASA and National Reconnaissance Office payloads. Solid rocket boosters supplied by Aerojet Rocketdyne augment lift capability for heavy configurations. Performance characteristics enabled injection profiles for geostationary transfer orbit missions carrying satellites like those from SES S.A. and Intelsat, interplanetary missions to destinations explored by Jupiter and Pluto missions, and high-inclination insertions for polar payloads launched from Vandenberg Space Force Base.
Atlas V launched a wide range of payloads including flagship NASA missions such as the Mars Science Laboratory (Curiosity), the Mars 2020 rover (Perseverance), the OSIRIS-REx asteroid sample-return mission, and the New Horizons probe to Pluto. It supported national security missions for the National Reconnaissance Office and the United States Air Force as well as commercial communications satellites for operators like SES S.A., Intelsat, and Eutelsat. Scientific and exploratory payloads included missions developed by institutions such as Jet Propulsion Laboratory, Ames Research Center, Goddard Space Flight Center, and payloads from university consortia including Caltech and MIT. Notable secondary payloads and technology demonstrations involved partnerships with DARPA, NOAA, USGS, and international agencies like European Space Agency.
Atlas V operations are conducted from complexes at Cape Canaveral Space Force Station (SLC-41) and Vandenberg Space Force Base (SLC-3E). Processing workflows utilize integration facilities where payload fairings built by contractors such as Airbus Defence and Space and Lockheed Martin are mate-tested. Launch campaigns coordinate range support from Florida Spaceport, telemetry and tracking from the Eastern Test Range, and mission control coordination with entities including United Launch Alliance mission control and NASA flight operations teams at Johnson Space Center. Range safety and flight termination responsibilities involve collaboration with Air Force Space Command prior to its reorganization into the United States Space Force.
Since its inaugural flight in 2002, Atlas V achieved a long record of successful missions spanning commercial, civil, and national security sectors. Its reliability record has been analyzed in context with other expendable launch systems such as the Delta IV family and emerging competitors from SpaceX and international providers. High-profile successes included deployments of deep-space probes operated by Jet Propulsion Laboratory and numerous geostationary satellites. The vehicle’s operational history influenced procurement decisions by agencies including NASA, United States Department of Defense, and satellite operators like SES S.A. and Intelsat.
Upgrades over time addressed avionics modernization, fairing options, and upper-stage enhancements to support complex mission profiles in collaboration with partners such as Aerojet Rocketdyne and Pratt & Whitney. Program evolution considered transitions in response to geopolitical shifts affecting propulsion imports from NPO Energomash, prompting investigations into domestic replacements and new engine partnerships with companies including Blue Origin and Northrop Grumman. Future planning involved integration into broader national launch architectures alongside launch systems from SpaceX, Blue Origin, and international competitors, with attention from agencies like NASA and the United States Space Force for future science and defense tasking.
Category:Expendable launch systems