xiv Table of Contents Executive Summary............................................................................................................. i Purpose of the Study...................................................................................................................... i Key Findings...................................................................................................................................ii Question 1: Under what conditions would SBSP become competitive? ................................................... ii Question 2: What role, if any, should NASA have? .................................................................................... xii Conclusion .................................................................................................................................. xiii Table of Contents ............................................................................................................ xiv 1.0 Introduction................................................................................................................... 1 1.1 Background ..............................................................................................................................1 1.2 Study Questions .......................................................................................................................5 2.0 Methodology Overview................................................................................................. 5 2.1 Cost Estimations.......................................................................................................................6 2.1.1 Functional Decomposition of SBSP Systems ...............................................................................................6 2.1.2 Concept of Operations ................................................................................................................................6 2.1.3 Levelized Cost of Electricity.......................................................................................................................10 2.2 GHG Emissions Intensity .........................................................................................................12 3.0 Results......................................................................................................................... 13 3.1 Summary of SBSP System Costs and GHG Emissions ................................................................17 4.0 Sensitivity Analyses ................................................................................................... 18 4.1 Launch ...................................................................................................................................18 4.1.1 Direct Launch to GEO ................................................................................................................................18 4.1.2 Reduced Launch Costs...............................................................................................................................18 4.1.3 Electric Propulsion Orbital Transfer ..........................................................................................................19 4.1.4 Spacecraft Hardware Life ..........................................................................................................................20 4.2 Manufacturing .......................................................................................................................20 4.2.1 Initial Hardware Costs ...............................................................................................................................20 4.2.2 Learning Curve ..........................................................................................................................................21
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