ix The following combination of revised assumptions yields SBSP solutions that are cost competitive with terrestrial alternatives, with lower GHG emissions: • lower launch cost: $50M per launch, or $500/kg; $425/kg with 15% block discount • electric propulsion orbital transfer from LEO to GEO • extended hardware lifetimes: 15 years • cheaper servicer and debris removal vehicles: $100M and $50M, respectively • efficient manufacturing at scale: learning curves of 85% and below Our sensitivity analyses highlight the need for advances across a wide range of SBSP enabling capabilities.
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