2.4- 4 Propulsion Requirement for Orbit Inclination Control . 95 2.4- 5 Satellite Motion ........................................ 97 2.4- 6 Canted Vehicle................................................ 103 2.4- 7 Cant Angle Comparisons.................................... 103 2.4- 8 Momentum Storage Requirements ............................ 105 2.4- 9 Capabilities of Existing Devices ........................ 105 2.4- 10 Momentum Wheel Design Parameters ........................ 106 2.4- 11 Large Momentum Wheel Conceptual Design .................... 106 2.4- 12 Analysis of Problem .................................... 107 2.4- 13 Periodic Motion ........................................ 109 2.4- 14 Required Initial Conditions ............................ 110 2.4- 15 Stable Oscillatory Motion ................................ 110 2.4- 16 Control Requirements .................................... 112 2.4- 17 Configuration B Periodic Motion ........................ 113 3.1- 1 SPS Equilateral Triangle Beam Verendeel Truss-Formed Sheet . 116 3.1- 2 SPS Structural Element Fabricator ........................ 117 3.1- 3 Tri-Beam Fabrication........................................ 118 3.2- 1 SPS Construction Jig/Base Complex ........................ 119 3.2- 2 Central Construction Base.................................... 119 3.2- 3 Intersection Facility - Perspective View ................ 120 3.2- 4 Intersection Facility - Orthogonal Views ................ 121 3.3.-1 SPS Construction Facilities Operational.....................122 3.3- 2 Solar Cell and Reflector Film Deployment Facility Center Vertex Crawler .................... 123 3.3- 3 Film Deployment Concept Cable System .................... 124 3.3- 4 Tribeam Personnel Scooter ................................ 125 3.3- 5 Reflector and Solar Cell Film Installation .... 125 3.4- 1 Rotary Joint, Slip-Ring Structure, and Electrical Track . 126 3.4- 2 Rotary Joint, Slip-Ring Structure, and Electrical Track Buildup................................127 3.5- 1 Microwave Antenna Trunnion Structure .................... 127 3.5- 2 Microwave Antenna Trunnion Structure Buildup .... 128 3.5- 3 Beam Interface Attachments.................................... 129 3.6- 1 Microwave Antenna Hexagonal Compression Frame .... 130 3.6- 2 Microwave Antenna Hexagonal Compression Frame Buildup . . 130 3.6- 3 Nth Satellite Assembly - 52nd Day..............................131 3.6- 4 Microwave Antenna RF Element Installation - Negative Lens Configuration .................. 131 3.6- 5 Assembly Schedule - Nth Satellite............................ 132 3.7- 1 Central 30-Meter by 30-Meter Subarray In-Line Assembly Facility........................................133 3.7- 2 Microwave Antenna 30-Meter by 30-Meter Subarray Modular Assembly and Installation ................ 134 3.7- 3 Microwave Antenna Modular Sizes ...................... 134 3.7- 4 Microwave Antenna Elements - 3-Membrane Negative Lens Concept . ........ ................... 135 3.7- 5 Microwave Antenna Modules and Catenary Structure Assembly Sequence ........................ 135 3.7- 6 Antenna Subarray Deployment Sequence .............. . 136 3.8- 1 Microwave Antenna Maintenance Concept .................. 137
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