Computer Science – Performance
Scientific paper
Jan 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002iaf..confe.934s&link_type=abstract
IAF abstracts, 34th COSPAR Scientific Assembly, The Second World Space Congress, held 10-19 October, 2002 in Houston, TX, USA.,
Computer Science
Performance
Scientific paper
The premise behind the Atlas V launch system family is to provide a single system that can accommodate medium-lift to heavy-lift payloads. Lockheed Martin invested significant resources to develop the Atlas V launch vehicle featuring--a Common Core Booster using the RD-180 engine, an advanced solid rocket booster strap-on, advanced fault-tolerant avionics, the Common Element Centaur, and two payload fairings (PLF) sizes--an aluminum 4 meter and a composite 5 meter. With this "mix-and-match" approach, Lockheed Martin can accommodate payloads ranging from 10,900-19,000 lbm to geosynchronous transfer orbit (GTO) and up to 29,000 lbm to low-Earth orbit (LEO) in a single booster configuration. For heavy-lift missions (> 41,000 lbm to geosynchronous orbit), Lockheed Martin has designed a three-body configuration system to place satellites directly into their final orbit. Reliability, producibility, and operability were optimized for this new family while using heritage, flight- proven hardware wherever practical (booster engine, Centaur, payload adapters, payload fairings). With this approach, Lockheed Martin is able to offer a new family of vehicles, with minimum development risk and cost. It is also possible to reduce recurring cost without sacrificing Mission Success accomplishment due to the economies of scale of producing the system and the advanced use of automation during manufacturing and pre-launch processing. Atlas V development, while mainly funded by Lockheed Martin, also received a significant (500M) investment from the USAF under the EELV program. This investment ensures that USAF requirements are an integral part of the Atlas V system, such as standard payload interfaces, and a bracket of USAF and DoD payload performance needs. Lockheed Martin demonstrated the validity of this evolutionary approach on May 24, 2000, when its Atlas III vehicle, AC-201, performed flawlessly placing the EUTELSAT W4 satellite into final orbit. 80% of the Atlas V subsystems were flight proven on AC-201 providing minimal risk for Atlas V customers. Lockheed Martin has also developed a "clean-pad" launch operations concept that will provide for a cost- effective, automated launch processing/operations approach to meet expected future launch demand. This paper will highlight advances developed for the Atlas V launch system and the status as we prepare for first flight in mid-2002. "Copyright 2001 by (Lockheed Martin).
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