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Clark, L. G.

Publications and source records attributed to Clark, L. G..

At least 19 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS1986

Space Station and technology experiments

The space technology experiments to be performed on the Space Station are discussed. The characteristics of the dual keel Station, which contains modules for habitation, logistics, and laboratories, applicable to technology experiments are described. Experiments utilizing the initial Space Station design include: (1) assessing the instrumented Space Station, (2) the testing of spacecraft materials and coatings, and (3) a microelectronics data system experiment; the objectives and procedures for these studies are examined. With increases in the number of modules, and electrical power and OTV capabilities, the evaluation of teleoperated techniques, the development and testing of a diversified antenna near- and far-field measurement facility, the study of cryogenic propellant transfer, and storage, and the implementation of a large concentrator in space are possible; descriptions of these proposed experiments are provided.

Breckenridge, R. A.↗
NASA NTRS1978

LDEF/Shuttle capabilities for environmental testing in space

The Long Duration Exposure Facility (LDEF) is being developed to accommodate experiments which require a free-flying exposure in space and which benefit from postflight laboratory analysis of the retrieved experiment hardware. The first LDEF mission, which is planned for a 6- to 12-month stay in space is scheduled in the late 1970s during the Shuttle Orbital Flight Test Program. The LDEF is a simple reusable structure which is three-axis gravity gradient stabilized when free flying in space. The experiments on the LDEF are totally self-contained in trays mounted to the structure. After the LDEF is either revisited or retrieved by the Shuttle, the trays with experiments will be returned to the experimenters for postflight inspection. Attention is given to the fabrication of a second LDEF for a long-term mission planned in 1979, aspects of LDEF orbit life time, the radiation environment, questions of solar exposure, the thermal environment, and the vacuum (atomic particle) environment.

Clark, L. G.↗
NASA NTRS1978

Space qualification of optical instruments using the NASA Long-Duration Exposure Facility

The NASA Long-Duration Exposure Facility (LDEF), designed for the in situ testing of optical instrumentation in the space environment is described. The LDEF is basically a reusable structure which is three-axis gravity-gradient stabilized when flying free in space. The structure weighs about 8,000 lbs. and accommodates experiment trays weighing about 10,000 lbs. A vacuum exposure control canister is being designed for controlled exposure experiments. The LDEF will have an experiment power and data system and a shuttle bay environmental measurements system is being designed for measuring parameters such as acoustics, vibration, acceleration. The induced environment contamination monitor will evaluate the contamination levels of shuttle payloads. Experiments currently under development include the evaluation of active optical components and the study of fiber optic data transmission.

Clark, L. G.↗
NASA NTRS1977

The long duration exposure facility - A test bed for space technology development

The long duration exposure facility (LDEF) is being developed by NASA to accommodate, using the Shuttle, a class of technology, science, and applications experiments which require a free-flying exposure in space. The LDEF offers an attractive approach to experiments which require long-term exposure in space. LDEF missions up to 10 years duration are possible and requested by researchers. Attention is given to the LDEF concept and the operations, plans for technology testing in space, and aspects of investigator participation.

Dibattista, J. D.↗