5.1.2 Concept Overview 5.1.3 Specific Technology Issues & Rationale 5.1.4 Preliminary Mass Budget 5.1.5 Programmatics & Schedule 5.1.6 Cost 5.1.7 Laser Discussion 5.2 . The Astro-SPAS Reference Concept 5.2.1 Concept Evolution 5.2.2 Microwave Advanced Demonstrator 5.2.3 Laser Advanced Demonstrator 5.2.4 Programmatics & Schedule Discussion 6. Other Powersat Options 6.1 Columbus Precursor Missions 6.1.1 Eureca-3 6.1.2 Spacelab E-l 6.2 Space Shuttle Launch of Small Payloads 6.2.1 Use of GAS CAP for a Shuttle-Based Experiment 6.2.2 Deployment of Transmitter & Receiver from GAS 6.2.3 Use of Hitchhiker G & M 6.3 Maser & Maxus Sounding Rockets 7. International Cooperation Overview 7.1 With the USA 7.2 With Japan 7.3 With the Commonwealth of Independent States 8. Principal Conclusions & Recommendations for a Powersat Demonstrator Programme 8.1 Conclusions 8.2 Recommendations 9. References & Footnotes APPENDIX : INDUSTRY CONTRIBUTIONS & COMMENTS
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