Moon & Mars Orbiting Spinning Tether Transport - Tethers Unlimited

Tethers Unlimited, Inc.MMOSTT Final ReportTable 1. 2,500 kg to GTO Tether Boost Facility Design Summary:• Control Station mass = 13,267 kg (includes 21% mass margin)• Operational mass = 23,358 kg, no margin Control Stationw/Payload Adapter Fixture• GLOW = 19,891 kg with 15% margin, no PAFPower System:• 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)• 213.8 kg (includes 6% mass margin)Electrodynamic Tether Subsystem• Sized for 80 km conductive tether, total length 100 km, 300,000 W, 40 µN/W thrustefficiency• Control Subsystem with 1m diameter, 1.5m long reel, motor, tether guides, powerconversion, FEACs (field emitter array cathodes)• 1,933 kg (includes 36% mass margin)11