2011 American Astronautical Society Robert H. Goddard Memorial Symposium--Todd May, NASA

1. Space Launch System (SLS)Marshall Space Flight Center Todd May SLS Program Office March 30, 2011

2. NASA: Why America Explores Space Innovation and Education Are Keys to Winning the Future Public Engagement Scientific Knowledge Global Partnerships Exploration Preparation Economic Prosperity National Security National Aeronautics and Space Administration 7980_Goddard_Symposium.2

3. Policies and Processes 2009 2010 2011 Augustine Committee Final Report (October) FY11 Budget Submittal (February) 2011 NASA Strategic Plan (February) Goal 1: Extend & sustain human activities across the solar system. Objective 1.3: Develop an integrated architecture & capabilities for safe crewed & cargo missions beyond LEO. 2010 U.S. Space Policy (June) FY12 Budget Submittal (February) "A heavy-lift launch capability to LEO, combined with the ability to inject heavy payloads away from the Earth, is beneficial to exploration and it also will be useful to the national security space and scientific communities." ”U.S. access to space depends…on launch capabilities. U.S. Government payloads shall be launched on vehicles manufactured in the United States unless exempted…" President Signs Budget Authorization (October) "NASA will continue architecture planning for the MPCV capable of taking human explorers to distant locations throughout the inner solar system. The SLS Program will develop the heavy-lift vehicle that will launch the MPCV, other modules, and cargo for these missions." "Directs NASA to initiate development of an SLS with the capability to lift between 70 and 100 tons into LEO without an upper stage, to carry an Earth departure stage bringing the total lift capability to 130 tons or more, to lift the MPCV, and to serve as cargo backup for ISS cargo requirements or crew delivery not otherwise met by available commercial or partner-supplied vehicles. Sets a goal for core operational capability by 12/31/16." Implementing the Nation’s Space Agenda National Aeronautics and Space Administration 7980_Goddard_Symposium.3

4. Expanding Humanity’s Frontiers of Discovery Safely fly & retire the Space Shuttle & maintain safe access for humans to low-Earth orbit (LEO) as we fully utilize the International Space Station. Lay the foundation for humans in deep space—the Moon, asteroids, eventually Mars—through development of a powerful, evolvable Space Launch System (SLS) and Multipurpose Crew Vehicle (MPCV). Source: NASA FY12 Budget To reach for new heights and reveal the unknown so that what we do and learn will benefit all humankind. — NASA 2011 Strategic Plan National Aeronautics and Space Administration 7980_Goddard_Symposium.4

5. Capabilities-Driven Framework Mars Missions Capabilities required at each destination are determined by the mission and packaged into elements. This approach seeks to package these capabilities into a logical progression of common elements to minimize DDT&E and embrace incremental development. 35A 35B Mars Elements 6: Enable Mars Missions DISTANCE Full Capability NEA Missions 34B Space Exploration Vehicle (SEV) Solar Electric Propulsion (SEP) 5: Enable Deep Space Missions Minimal NEA Missions Long Duration Habitation Needed 34A Deep Space Habitat (DSH) 4: Enable Long Duration Missions Lunar Surface Missions Crew EVA Suit Block 2 33C Lunar Lander & GPOD Advanced Propulsion Needed 3: Enable Lunar Surface Missions Lunar Flyby &Orbital Missions 33A 33B GEO/HEO Missions 32A 32B High Thrust in-Space Propulsion Needed Cryogenic Propulsion Stage (CPS) 2: Enable Missions Beyond LEO KEY Robotics & EVA Module (REM) Crew EVA Suit Block 1 Capability Gates New LEO Missions 31A Candidate Destination Multi-Purpose Crew Vehicle (MPCV) DRM Ultimate Destination Goal SPACE LAUNCH SYSTEM - HLLV DRM Element Capability 1: Enable New LEO Missions MISSION DURATION Increasing Flexibility and Fostering Sustainability National Aeronautics and Space Administration 7980_Goddard_Symposium.5

6. Space Launch System Progress Report Using the Results of Over 2,000 Architectures Studied Over the Last 10 Years 2010 2011 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Heavy Lift Launch Vehicle (HLLV) Heavy Lift Propulsion Technology (HLPT) NASA/USAF Common Engine Study STUDIES HLLV Figures of Merit (FOM) Human Exploration Framework Team (HEFT) I HEFT II HLPT Broad Agency Announcement (BAA) SLS Requirements Analysis Cycle I (RAC I) SLS Mission Concept Review (MCR) MILESTONES HQ Checkpoint Human Exploration Capabilities Analysis of Alternatives National Aeronautics and Space Administration 7980_Goddard_Symposium.6

7. Requirements Drive the Solution Auxiliary Power & Networks Aerodynamics Propulsion Guidance, Navigation, & Control Structures A designer knows he has achieved perfection not when there is nothing left to add, but when there is nothing left to take away. — Antione de Saint Exupery National Aeronautics and Space Administration 7980_Goddard_Symposium.7

8. Feb 19, 2010 July 12, 2001 Dec. 6, 1998 Planning Programmatic Content to Deliver Incremental Capability Engineering Takes Time and Patience … and Compromise National Aeronautics and Space Administration 7980_Goddard_Symposium.8

9. The Next Horizon Discovering, Learning, Understanding National Aeronautics and Space Administration 7980_Goddard_Symposium.9

10. For More Information www.nasa.gov