Moon & Mars Orbiting Spinning Tether Transport - Tethers Unlimited

Appendix F: Tether Boost Facility Design Final Report3 Boost FacilitySection 3.2 summarizes the current design features of the first launch of a partialcapability Control Station. The Control Station (along with grapple and tether) is withinmass budgets for launch on a Delta-IV Heavy Launch Vehicle, allowing for an initialoperational capability with a single launch mission. Primary features of the system areuse of PV concentrator solar arrays, Lithium-Ion batteries, CMGs for attitude maneuverand control, GPS/INS for guidance and navigation input, and a tether subsystem thatwill support a 100 Km, 300 kW electrodynamic tether.A detailed description of the tether boost facility is inlcuded in this report asAppendix L-2.3.1 First Facility Launched• Control Station mass = 13,267 kg (includes 21% mass margin)• Operational mass = 23,358 kg, no margin CS w/PAF• GLOW = 19,891 kg with 15% margin, no PAF3.2 FeaturesEPS• Scarlet-like concentrator PV arrays, 563 square meters• Standard, state-of-the-art PV array drive motors• State-of-the-art power management and distribution except forelectrodynamic tether subsystem• Lithium-ion battery power storage system• 5,410 kg (includes 14% mass growth margin)Communication Subsystem• Downlink communication with ground station(s) andcommunication with Grapple Assembly and PAA (via TetherFacility Network)• State-of-the-art, COTS hardware (antennae/transceivers)• Dual redundancy• 4.2 kg (includes 16% mass growth margin)C&DH• State-of-the-art, COTS hardware• Dual redundancy• 29 kg (includes 13% mass growth margin)ADCS/GN&C• 2 Control Moment Gyros (no redundancy), each assumed half size of a Skylab CMG• 2 sun sensors• 2 inertial navigation unit• GPS antennae (3)/tranceivers (2)F-10