1976 NASA SPS Engineering and Economic Analysis Summary

LI ST OF TABLES Table Title Page 1-1. SPS Program Schedule................................................................. 1-7 5-1. Summary Characteristics of the Photovoltaic System . . . 5-3 5-2. Summary Characteristics of the Solar Thermal Concentrator SPS..................................................... 5-8 5-3. Summary of Reference Baselines............................................. 5-12 7-1. Efficiencies of Present Solar Cells.......................................... 7-5 7-2. Solar Array Characteristics...................................................... 7-9 7-3. Key Issues for SPS Power Generation and Distribution . . 7-14 7-4. Solar Array Structural Configuration Characteristics and Requirements.................................................. 7-17 7-5. Conductor Mass and Loss............................................................ 7-31 7-6. Synchronous Orbit Perturbations............................................. 7-33 7-7. Electric Thruster Considerations............................................. 7-44 7-8. Photovoltaic Solar Power Satellite Fuel Consumptions (Z-Axis Solar Orientation)................................ 7-56 7-9. Photovoltaic SPS Orientation Comparison............................... 7-57 7-10. Electric Thruster Considerations for Photovoltaic SPS Attitude Control and Station Keeping............... 7-60 7-11. Damage Rates from Collisions................................................... 7-64 7-12. SPS Maintenance............................................................................. 7-65

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