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Record Details

Record 78 of 27957
Earth Port-Moon Port design
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Abstract: A pair of compatible transfer stations or Space Ports and associated transfer vehicles was designed in order to support permanent manned lunar facilities. One of the Space Ports was placed in earth orbit (not necessarily Low Earth Orbit - LEO), and the other in lunar orbit. The primary purposes of the Space Ports was to support the lunar surface facility, the return of lunar manufactured items to the earth, and the transfer of lunar manufactured items to space vehicles and earth orbital space stations. The design was constrained by the following: (1) The orbital altitudes and inclinations of the Earth Port and Moon Port were chosen to minimize the overall cost of transporting materials to and from the moon. The ETO (Earth-to-Orbit) costs were considered separately to allow consideration of initiating planetary missions, etc., from the Earth Port. (2) A new earth launch point was chosen to facilitate the support of the lunar facility. This launch point was chosen to minimize overall costs, maximize overall safety, and to avoid political problems. To this end, it was mandatory the launch site be owned by the United States or one of its close allies. In addition, the launch would take place over water and expendable stages would drop into the ocean. Space shuttle type vehicles could be used if appropriate provisions were made for aborts, SRB and ET impact, etc. The ground track and impact point studies included space shuttle type vehicles, current ELV's (expendable launch vehicles, and HLLV's (heavy lift launch vehicles). (3) The Earth Port and Moon Port orbits were selected so that transfer trajectories between the two facilities could be initiated often without major plane change penalties. The amount of these penalties was calculated. Families of Earth Port to Moon Port and Moon Port to Earth Port trajectories were calculated to document the energy requirements and penalties. (4) Space Port module designs included module systems definitions, module masses, system masses, module and system volumes, module and system power requirements, etc. (5) The Space Port designs included specifications and justification for: Permanent crew size; Warehousing capacity; Assembly, assembly support, and repair; Unsupported operational capability; Nominal resupply intervals; Contingency resupply options; Transient personnel support capability; Costing, based on the Space Station Cost Model.
Publication Date: Jan 01, 1987
Document ID:
19930074823
(Acquired Dec 28, 1995)
Accession Number: 93N72270
Subject Category: GROUND SUPPORT SYSTEMS AND FACILITIES (SPACE)
Coverage: Abstract Only
Document Type: Conference Paper
Publication Information: USRA, Agenda of the Third Annual Summer Conference, NASA(USRA University Advanced Design Program; p 32
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: Texas Univ.; Austin, TX, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: AEROSPACE SAFETY; EARTH ORBITS; LAUNCHING; LUNAR ORBITS; SPACE MISSIONS; SPACE SHUTTLE ORBITERS; SPACE SHUTTLES; SPACE STATIONS; COSTS; GROUND TRACKS; HEAVY LIFT LAUNCH VEHICLES; LAUNCH VEHICLES; LAUNCHING SITES; LOW EARTH ORBITS; LUNAR SURFACE; TRAJECTORIES
Imprint And Other Notes: In USRA, Agenda of the Third Annual Summer Conference, NASA/USRA University Advanced Design Program p 32 (SEE N93-72246 15-12)
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