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  • 1
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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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  • 2
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    Some developments in improved methods for the measurements of the spectral irradiances of solar simulators (1963)
    In:  CASI
    Details
    Publication Date: 2019-05-23
    Description: Measurement of spectral emission from solar simulators - photoelectric photometry
    Keywords: SPACE RADIATION
    Type: NASA-CR-201
    Format: application/pdf
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  • 3
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    Triton's global heat budget (1991)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Internal heat flow from radioactive decay in Triton's interior along with absorbed thermal energy from Neptune total 5 to 20 percent of the insolation absorbed by Triton, thus comprising a significant fraction of Triton's surface energy balance. These additional energy inputs can raise Triton's surface temperature between approx. 0.5 to 1.5 K above that possible with absorbed sunlight alone, resulting in a factor of approx. 1.5 to 2.5 increase in Triton's basal atmospheric pressure. If Triton's internal heatflow is concentrated in some areas, as is likely, local effects such as enhanced sublimation with subsequent modification of albedo could be quite large. Furthermore, indications of recent albedo change on Triton suggest that Triton's surface temperature and pressure may not now be in steady state, further suggesting that atmospheric pressure on Triton was as much as 10 times higher in the recent past.
    Keywords: SPACE RADIATION
    Type: NASA-CR-188178 , NAS 1.26:188178
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  • 4
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    Cosmic ray neutrino tests for heavier weak bosons and cosmic antimatter (1981)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A program for using high energy neutrino astronomy with large neutrino detectors to directly test for the existence of heavier weak intermediate vector bosons (ivb) and cosmic antimatter is described. Such observations can provide a direct test of baryon symmetric cosmologies. Changes in the total cross section for nu(N) yields mu(X) due to additional propagators are discussed and higher mass resonances in the annihilation channel bar-nu sub e e(-) yields X are analyzed. The annihilation channel is instrumental in the search for antimatter, partcularly if heavier IVB's exist.
    Keywords: SPACE RADIATION
    Type: NASA-TM-83878 , NAS 1.15:83878
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  • 5
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    Apollo 15 green glasses. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The samples analyzed include 28 spheres, portions of spheres, and angular fragments from soil 15101. Emerald green glasses from other soils are identical to those from 15101. The composition of the green glass is unlike that of any other major lunar glass group. The Fe content is comparable to that in mare basalts, but Ti is much lower. The Mg content is much higher than in most lunar materials analyzed to date, and the Cr content is also high. The low Al content is comparable to that of mare basalt glasses.
    Keywords: SPACE SCIENCES
    Type: Physics of the Earth and Planetary Interiors; 7; June 197
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  • 6
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    Luna 20 soil - Abundance and composition of phases in the 45-125 micron fraction. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Glass compositions in the Luna 20 soil indicate a minor contribution of mare rocks and a major contribution of highly feldspathic highland material. Glasses with the composition of highland basalt (anorthositic gabbro or norite) predominate in a range of highly aluminous glasses. The analyses of minerals in the soil show that the highland rocks have a unique assemblage of minerals that can readily be distinguished from the mineral assemblages of either mare or KREEP basalts. The soils are characterized by abundant anorthitic, low-Fe plagioclase. Highly magnesian orthopyroxenes, pigeonites, and augites are the most prominent pyroxenes. Unlike mare basalt pyroxenes, clinopyroxenes with intermediate Ca values are not abundant, but extreme iron enrichment toward pyroxferroite does occur. Olivines are more abundant than at other sites and are Mg-rich, low in Ca and Cr. Spinels with compositions approaching MgAl2O4 predominate over pleonastes and chromites. Ilmenite and metal are present but not abundant. The mineral compositions are consistent with derivation from a suite of highly feldspathic rocks in which highland basalt compositions predominate.
    Keywords: SPACE SCIENCES
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  • 7
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    Highly aluminous glasses in lunar soils and the nature of the lunar highlands. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Keywords: SPACE SCIENCES
    Type: Geochimica et Cosmochimica Acta; 36; Aug. 197
    Format: text
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  • 8
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    Petrology of a portion of the Mare Fecunditatis regolith. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Extensive microprobe analyses have been made of pyroxenes, plagioclases, olivines, opaque minerals, and glasses in two 0.025 g lunar samples returned from the Luna 16 mission, with the aim to characterize the Mare Fecunditatis regolith. No major differences were found between the near surface soil horizon A and horizon D at approximately 30 cm depth. Resulting characteristics of the mineral examined are presented and discussed.
    Keywords: SPACE SCIENCES
    Type: Earth and Planetary Science Letters; 13; Jan. 197
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  • 9
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    Major element composition of glasses in three Apollo 15 soils. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Approximately 180 glasses in each of three Apollo 15 soils have been analyzed for nine elements. Cluster analysis techniques allow the recognition of preferred glass compositions that are equated with parent rock compositions. Green glass rich in Fe and Mg, poor in Al and Ti may be derived from deep-seated pyroxenitic material now present at the Apennine Front. Fra Mauro basalt (KREEP) is most abundant in the LM soil and is tentatively identified as ray material from the Aristillus-Autolycus area. Highland basalt (anorthositic gabbro), believed to be derived from the lunar highlands, has the same composition as at other landing sites, but is less abundant. The Apennine Front is probably not true highland material but may contain a substantial amount of material with the composition of Fra Mauro basalt, but lacking the high-K content.
    Keywords: SPACE SCIENCES
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  • 10
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    Apollo 14 - Nature and origin of rock types in soil from the Fra Mauro formation. (1971)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Compositions of glasses in the Apollo 14 soil correspond to four types of Fra Mauro basalts, to mare basalts and soils, and, in minor amounts, to gabbroic anorthosite and potash granite. The Fra Mauro basalts can be related by simple low pressure crystal-liquid fractionation that implies a parent composition like that of Apollo 14 sample 14310.
    Keywords: SPACE SCIENCES
    Type: Earth and Planetary Science Letters; 12; Sept
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