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Moon & Mars Orbiting Spinning Tether Transport - Tethers Unlimited

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Appendix L: <strong>Tether</strong> Boost Facility Design Final Report3 System Requirements3.1 System Performance3.1.1 Payload MassThe nominal payload mass shall be 5000 kg.3.1.2 Nominal Pickup OrbitThe system shall pick up nominal payloads from an equatorial circular orbit at 300 kmaltitude above the Earth.3.1.3 Nominal Release OrbitThe system shall release nominal payloads into Geosynchronous Transfer Orbit (GTO).The change in velocity (delta-v) from the nominal pickup orbit to GTO is 2460 m/s.3.1.4 Release Orbit Insertion ErrorThe release orbit insertion error shall be no greater than the release orbit insertion errorof Ariane 5 or Delta 4, whichever is smaller, in each of the seven orbital elements.3.1.5 Payload Interfaces & AccommodationPayload interfaces and accommodations shall be compatible with any payload designedto be compatible with Ariane 5 or Delta 4.3.1.6 Payload EnvironmentThe payload environment shall be compatible with any payload designed to becompatible with Ariane 5 or Delta 4.3.1.7 Turnaround TimeThe maximum system turnaround time between deliveries of nominal payloads shall be30 days.3.2 System Durability, Reliability, Maintainability, and Safety3.2.1 Design LifeThe design life of the system shall be 10 years with 99% confidence.This requirement does not mean that no system elements or components will beexpended, repaired, or replaced in 10 years. For example, the PayloadAccommodation Assembly (PAA) for GTO payloads may be expendable.3.2.1.1 Self-entanglementThe system shall avoid entanglement of the tether with any element of the system.3.2.1.1.1 <strong>Tether</strong> DynamicsThe system shall measure and control tether dynamics.L-43

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