Guidance, trajectory and capture of lunar materials

Details Guidance, trajectory and capture of lunar materials Guidance, trajectory and capture of lunar materials

May 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979smf..confq....h&link_type=abstract

Princeton University and American Institute of Aeronautics and Astronautics, Conference on Space Manufacturing Facilities, 4th,

Physics

Catchers, Guidance (Motion), Lunar Launch, Mass Drivers, Moon-Earth Trajectories, Space Manufacturing, Acceleration (Physics), Approximation, Earth-Moon System, Earth-Moon Trajectories, Equations Of Motion, Libration, Lunar Photography, Lunar Topography, Mass Transfer, Orbital Launching, Space Commercialization

Scientific paper

An evaluation of over 48,000 test trajectories yields all achromatic trajectories from the moon to any of the earth-moon libration points L1, L2, L4, L5, these being candidate sites for a mass-catcher. There are ten such achromatics; their characteristics are studied and a photographic atlas of their launch sites is given. The best transport mode involves launch from Mare Tranquillitatis to L2; the mass-catcher is considered to maneuver near L2; general equations for its motion are given, incorporating the elliptic restricted three-body problem along with the requirement that it always be reachable via achromatics, and that it undergo acceleration due to the incoming mass-stream. Discussion is given of optimized solutions for catcher motion which involve solution of an approximate linearized literal form of the equations. Required acceleration levels and velocity changes are found, and assessment is given of three propulsion modes: ion-electric, Rotary Pellet Launcher, and Advanced Space Engine. A reference catcher design is proposed, and discussion is given of its operational use as well as of an overall system for lunar mass transport.

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