Table 3.2. 5 Thousand Megawatt SSPS Unit Cost Summary The Direct DDT&E programs pertain to those program elements which would not be developed were it not for the decision to develop the SSPS. These total approximately $19.2 billion. Of much smaller magnitude, $1.3 billion, are the development costs referred to as "Related DDT&E". These are developments that are necessary for the realization of an SSPS but might be required by other space programs. The DDT&E summarized in Table 3.3, designated "Support Programs" are required for the launch, assembly and orbital
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