This assumes that the Government will pursue an active program of fuel conservation in the next 10 years, which is, I believe, the only policy option that would yield signifiacnt results over that time period. Hence the prices, therefore, of terrestrial systems will rise, and by 1995 we may be in the ball park. One, I cannot say exactly what future prices will be. All we can say is that, based on the 27 mills for SSPS that I reported on earlier and a distribution of cost estimates between 20 to 70 mills for future terrestrial systems, that given those projections, we believe that there is a likelihood that the satellite solar power station, would be cost effective. Regarding the D.D.T. & E. payback—given that the terrestrial systems or competition, if you will, may be within the 20- to 70-mill range—if the competition were at 35 mills, the satellite solar power station might repay the entire $44 billion D.D.T. & E. bill by the year 2013 with less than 60 units in operation. We have recommended, based upon an initial plan for development—a three-stage plan which will be entered into the record— technology areas that we believe have to be understood before the SSPS system can be made operational. These include point-design development, systems and economics studies, microwave power technology, solar-array technology, large structures—the SSPS is a very large structure—flight mechanics and control, operations, manufacturing, assembly and maintenance, and environmental and other impacts. And that, Mr. Chairman, summarizes my paper that I will enter into the record. Thank you very much. [The prepared statement of Dr. Edward Greenblat follows j
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