AEROSPACE REPORT NUMBER: TOR-2009(2187)-9151, HUMAN-RATED DELTA IV HEAVY STUDY CONSTELLATION ARCHITECTURE IMPACTS (01 JUN 2009)

AEROSPACE REPORT NUMBER: TOR-2009(2187)-9151, HUMAN-RATED DELTA IV HEAVY STUDY CONSTELLATION ARCHITECTURE IMPACTS (01 JUN 2009)., This study assesses the technical, cost, and schedule feasibility of replacing the Ares I with a human-rated evolved expendable launch vehicle (HR EELV), and its first-order effects on the overall Constellation architecture. The study consists of several objectives: 1. Examine if an EELV, specifically the Delta IV Heavy (Delta IV H), could serve the crew-launch function, and if so, determine the impacts to the launch vehicle, production, and launch-base processing and fabrication. 2. Assess the effects on the Constellation architecture elements of replacing Ares I with a human-rated version of Delta IV H (HR Delta IV H). 3. Estimate the costs and timeline of replacing Ares I with an HR Delta IV H. Estimate the impacts to Ares V cost and development time and other Constellation elements to the extent possible. 4. Identify the impacts on national security space (NSS) if NASA utilizes an HR Delta IV H for low Earth orbit (LEO) human missions.