ILLUSTRATIONS Figure Page 1-1 Preliminary Design Option Matrix........................................................... 1-3 1-2 Task 1 - Preliminary Design Study Logic, Mechanical Systems and Flight Operations..................................................................................... 1-3 1-3 Task 2 - Concept Definition Study Logic ................................................ 1-4 2-1 Control System Requirements..................................................................... 2-2 2-2 Control System Requirements..................................................................... 2-2 2-3 Mechanical System Options Recommended for Task 2 Study............. 2-4 2-4 Antenna Geometry Tradeoff ....................................................................... 2-6 2-5 Power Level Limitations Due to Material Thermal Properties . . 2-6 2-6 Temperature Difference Between Structural Member Located Different Distances Above the Antenna Surface................................... 2-7 2-7 Task 2 Baseline Design Guidelines ......................................................... 2-8 2-8 Level 1 Assembly Functional Flow............................................................ 2-10 2-9 Baseline SSPS................................. 2-10 2-10 Mission Options ............................................................................................... 2-11 2-11 SSPS Orbital Decay Due to Aerodynamic Drag....................................... 2-12 2-12 Antenna Structural Arrangement ............................................................... 2-13 2-13 Rotary Joint.............................. 2-15 2-14 Structure/Waveguide Interface..................................................................... 2-16 2-15 Structural Joints..................... 2-17 2-16 Comparison of Maximum Termperature and Thermal Gradients . . 2-18 2-17 Temperature Difference Between Beam Cap Members Located Different Distances Above Antenna Surface ................ 2-20 2-18 Waste Heat Flux at Center of Antenna as Function of Scale Factor.............................................................................. 2-20 2-19 Cross-Section Design...................................................................................... 2-22 2-20 Range of Thermally Induced Deflections and Local Slope................... 2-23 2-21 Structural Detail Parts Assembly Options.............................................. 2-24 2-22 Detail Part Assembly Summary.................................................................. 2-24 2-23 MPTS Antenna Structural Assembly.......................................................... 2-26 2-24 Assembly Operations Analysis Approach................................................. 2-27 2-25 Summary of Assembly Options..................................................................... 2-28 2-26 Transportation and Assembly Elements ................................................. 2-29
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