37 Appendix B: Methodology Figure 16. Cost Calculations for SBSP Systems This appendix describes the approach to determining cost calculations for two representative space-based solar power designs—Representative Design One (RD1), the Innovative Heliostat Swarm, and Representative Design Two (RD2), the Mature Planar Array—and the methods of estimating their GHG emissions. We describe the methodology in terms of the logical flow of each piece of the analysis. After a brief methodology overview, we proceed with sections as follows: • Approach to Cost Calculations: This describes the functional decomposition of each system, details system costs by ConOps phase, and calculates the levelized cost of electricity (LCOE) for each system using determined capital expenditures and fixed operations and management costs. This also includes a breakdown of all relevant parameters and outputs, or results. • Approach to GHG emissions Calculations: This includes an Economic Input Output Life Cycle Assessment to estimate emissions and a comparison to other sources of renewable energy technologies. • Sensitivity Analyses: This describes alternate considerations that may have significant effects on lifecycle costs, including modified parameters, rationale, and effects on cost and GHG emissions.
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