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  • 1
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    Thermoluminescent dosimetry for the Apollo 16 microbial response to space environment experiment (M191) (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: Lithium fluoride thermoluminescent chips were used to provide an integrated dose from the broad spectrum of ionizing radiation to the Microbial Response to Space Environment Experiment (M191). The chips were positioned in the flight hardware to provide data on ionizing radiation within specific volume segments. A uniform radiation dose of 4.8 x 0.001 plus or minus 2 x 0.0001 joule/kg resulted.
    Keywords: BIOSCIENCES
    Type: Proc. of the Microbial Response to Space Environ. Symp.; p 191-197
    Format: text
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  • 2
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    Surface electrical properties experiment (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The surface electrical properties (SEP) experiment was used to explore the subsurface material of the Apollo 17 landing site by means of electromagnetic radiation. The experiment was designed to detect electrical layering, discrete scattering bodies, and the possible presence of water. From the analysis of the data, it was expected that values of the electrical properties (dielectric constant and loss tangent) of lunar material in situ would be obtained. The basic principle of the SEP experiment is interferometry. This principle involves only the interference of two or more waves to produce an interference pattern. The inversion of the interference pattern in terms of the spatial distribution of the electrical properties is the basic aim of the experiment (fig. 15-1). The experiment is most easily understood in terms of a single dipole antenna for radiating electromagnetic energy and a loop receiver for measuring the magnitudes of the fields.
    Keywords: SPACE SCIENCES
    Type: NASA. Johnson Space Center Apollo 17 Prelim. Sci. Rept.; 14 p
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  • 3
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    A variable beam splitter for lasers (1970)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Variable ratio beam splitter design and operation for lasers, using birefringent optics
    Keywords: MASERS
    Type: ; ADEMIE DES SCIENCES
    Format: text
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  • 4
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    Lunar deposits of possible pyroclastic origin (1974)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Orange glass droplets sampled from the Apollo 17 site were found to be both chemically and texturally homogeneous. None of these droplets, which are of possible pyroclastic origin, contained shock-damaged crystals which are common in glass produced by meteorite impacts. Black droplets are apparently the partially crystallized equivalents of the orange glass. Since chemically and texturally homogeneous glass droplets are known to form in terrestrial lava fountains of basaltic melt, the orange glasses from Apollo 11 and 17 sites and the green glasses from the Apollo 15 site may have formed in lava fountains of low-viscosity lunar basaltic magmas.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Geochimica et Cosmochimica Acta; 38; Nov. 197
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  • 5
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    Advanced radiographic imaging techniques. (1973)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Examination of the nature and operational constraints of conventional X-radiographic and neutron imaging methods, providing a foundation for a discussion of advanced radiographic imaging systems. Two types of solid-state image amplifiers designed to image X rays are described. Operational theory, panel construction, and performance characteristics are discussed. A closed-circuit television system for imaging neutrons is then described and the system design, operational theory, and performance characteristics are outlined. Emphasis is placed on a description of the advantages of these imaging systems over conventional methods.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
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  • 6
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    Feldspar basalts in lunar soil and the nature of the lunar continents (1974)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: It is found that 25% on the Apollo-14 glasses have the same composition as the glasses in two samples taken from the Luna-16 column. The compositions are equivalent to feldspar basalt and anorthosite gabbro, and are similar to the feldspar basalts identified from Surveyor-7 analysis for lunar continents.
    Keywords: LUNAR AND PLANETARY EXPLORATION
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  • 7
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    Transport properties of liquid metal hydrogen under high pressures (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: A theory is developed for the compressibility and transport properties of liquid metallic hydrogen, near to its melting point and under high pressure. The interionic force law is assumed to be of the screened Coulomb type, because hydrogen has no core electrons. The random phase approximation is used to obtain the structure factor S(k) of the system in terms of the Fourier transform of this force law. The long wavelenth limit of the structure factor S(o) is related to the compressibility, which is much lower than that of alkali metals at their melting points. The diffusion constant at the melting point is obtained in terms of the Debye frequency, using a frequency spectrum analogous with the phonon spectrum of a solid. A similar argument is used to obtain the combined shear and bulk viscosities, but these depend also on S(o). The transport coefficients are found to be about the same size as those of alkali metals at their melting points.
    Keywords: MATERIALS, METALLIC
    Type: Univ. Space Res. Assoc. High Pressure Phys. and Planetary Interiors; p 206-209
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  • 8
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    Major element composition of Luna 20 glasses. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Ten per cent of the 50 to 150-micron size fraction of Luna 20 soil is glass. A random suite of 270 of these glasses has been analyzed by electron microprobe techniques. The major glass type forms a strong cluster around a mean value corresponding to Highland basalt (anorthositic gabbro) with 70% normative feldspar. Minor glass groups have the compositions of mare basalts and of low-K Fra Mauro type basalts. The glass data indicate that Highland basalt is the major rock type in the highlands north of Mare Fecunditatis.
    Keywords: CHEMISTRY
    Type: Earth and Planetary Science Letters; 17; Dec. 197
    Format: text
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  • 9
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    Effectiveness evaluation of STOL transport operations (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A short-takeoff and landing (STOL) systems simulation model has been developed and implemented in a computer code (known as STOL OPS) which permits evaluation of the operation of a STOL aircraft and its avionics in a commercial airline operating environment. STOL OPS concentrated on the avionics functions of navigation, guidance, control, communication, hazard aviodance, and systems management. External world factors influencing the operation of the STOL aircraft include each airport and its geometry, air traffic at each airport, air traffic control equipment and procedures, weather (including winds and visibility), and the flight path between each airport served by the route. The development of the STOL OPS program provides NASA a set of computer programs which can be used for detailed analysis of a STOL aircraft and its avionics and permit establishment of system requirements as a function of airline mission performance goals.
    Keywords: AIRCRAFT
    Type: NASA-CR-114631
    Format: application/pdf
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  • 10
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    Three-point bridge calibration with one resistor (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Method calibrates transducer bridge curing unbalanced condition and line resistance errors are negligible. Series resistance method can be automated easily and controlled by 2-bit information source which provide 4 states for switches.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: ARC-10762
    Format: application/pdf
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