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  • Other Sources  (312)
  • LUNAR AND PLANETARY EXPLORATION  (191)
  • GEOPHYSICS  (121)
  • Biochemistry and Biotechnology
  • 1995-1999
  • 1980-1984
  • 1975-1979  (312)
  • 1977  (312)
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  • 1995-1999
  • 1980-1984
  • 1975-1979  (312)
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  • 1
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    National geodetic satellite program, part 1 (1977)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Equipment and techniques were evaluated operationally, by the Department of Defense, during the National Geodetic Satellite Program (NGSP). The theory, instrumentation, and data reduction methods used are described. Results obtained during the NGSP are given.
    Keywords: GEOPHYSICS
    Type: NASA, Washington Natl. Geodetic Satellite Program, Pt. 1; p 139-245
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Spectrophotometric and color estimates of the Viking lander sites (1977)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: The spectral radiance and color of the Martian sky and soil and the spectral reflectance of soil features are estimated from six-channel (0.4-1.0 micron) spectral data obtained with the Viking lander cameras. Images taken near local noon from the two landers reveal a sky that is brighter near the horizon than the soil but with a similar spectral radiance shape and color. The scenes are predominantly moderate yellowish brown in color with only subtle variations except for some dark grey rocks. Most spectral reflectance estimates are similar: they rise rapidly with increasing wavelength between 0.4 and 0.8 micron and with only a few exceptions exhibit a pronounced minimum centered about 0.93 micron. These characteristics are consistent with an abundance of Fe(3+)-rich weathering products, notably nontronite. However, the delineation of the number and abundances of total mineral phases requires further analyses and laboratory comparisons. Reflectance estimates for rocks have not been repeatable, probably because most rocks have irregular pitted surfaces that introduce significant shadowing components.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research; 82; Sept. 30
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    The search for organic substances and inorganic volatile compounds in the surface of Mars (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A total of four Martian samples, one surface and one subsurface sample at each of the two Viking landing sites, Chryse Planitia and Utopia Planitia, have been analyzed for organic compounds by a gas chromatograph-mass spectrometer. In none of these experiments could organic material of Martian origin be detected at detection limits generally of the order of parts per billion and for a few substances closer to parts per million. The evolution of water and carbon dioxide, but not of other inorganic gases, was observed upon heating the sample to temperatures of up to 500 C. The absence of organic compounds seems to preclude their production on the planet at rates that exceed the rate of their destruction. It also makes it unlikely that living systems that behave in a manner similar to terrestrial biota exist, at least at the two Viking landing sites.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research; 82; Sept. 30
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  • 4
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    Mars: Water Vapor Observations from the Viking Orbiters (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The global distribution of the water vapor has been mapped at low resolution throughout the period from the northern summer solstice to the following equinox. During this seasonal period the water vapor underwent a gradual redistribution, the latitude of maximum column abundance moving from the northern polar area to the equatorial latitudes. The total global vapor content remained approximately constant at the equivalent of about 1.3 cu km of ice. The various data obtained indicate that the residual polar caps are composed of water ice.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research; 82; 28; 4225-4248
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  • 5
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    Behavior of volatiles in Mars' polar areas - A model incorporating new experimental data (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A model has been developed to explain the north polar water vapor results obtained by the Viking orbiter Mars atmospheric water detector; it has also been used to compute the thickness of seasonally deposited CO2 frost, the variation of the total atmospheric pressure, and wind velocities due to mass motions associated with CO2 condensation. A north polar water ice thickness in excess of 1 m and an ice albedo a of 0.34(+0.06,-0.03) are inferred from a comparison of the model and experimental data. The model results confirm an earlier conclusion that the atmosphere over the ice is saturated. It is suggested that concentration of the atmospheric inert gases in the polar region, combined with local topography and arctic circulation patterns, could be responsible for the south remnant cap not being at the south pole
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research; 82; Sept. 10
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    NASA TECHNICAL REPORTS
  • 6
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    Applications of a new logical search on the lunar data base for use in pattern recognition classification of Apollo 15 mare basalts (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Lunar Science Conference; Mar 14, 1977 - Mar 18, 1977; Houston, TX
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Description and review of global measurements of atmospheric species from GASP (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A large volume of atmospheric constituent data is being collected in the global airlanes by specially equipped B-747 aircraft. This NASA program also obtains data from the similarly equipped NASA CV-990 aircraft during dedicated flights such as a recent near pole-to-pole latitude survey mission. Aerosol composition data are also collected with a NASA F-106 aircraft. Present measurements include ozone, carbon monoxide, water vapor, aerosol and condensation nuclei number densities, sulphates, nitrates, and the chlorofluoromethanes. Meteorological and flight parameters are also recorded for use in data analysis. The present aircraft operations obtain data between 6 and 13.5 km from 65 deg N between Europe and the North Pacific, and from 23 deg S over South America and 42 deg S over New Zealand. Typical constituent data from the aircraft operations during the first one and a half years are presented. Instrumentation is discussed.
    Keywords: GEOPHYSICS
    Type: Conference on Air Quality Meteorology and Atmospheric Ozone; Jul 31, 1977 - Aug 06, 1977; Boulder, CO; US
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Description and review of global measurements of atmospheric species from GASP (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Aerosol composition data were collected with a NASA F-106 aircraft. Present measurements include ozone, carbon monoxide, water vapor, aerosol and condensation nuclei number densities, sulphates, nitrates, and the chlorofluoromethanes. Meteorological and flight parameters are also recorded for use in data analysis. The present aircraft operations obtain data between 6 and 13.5 km from 65 degree N between Europe and the north Pacific, and from 23 degree S over South America and 42 degree S over New Zealand. Typical constituent data from the aircraft operations during the first one and a half years are presented. Instrumentation is discussed.
    Keywords: GEOPHYSICS
    Type: NASA-TM-73781 , E-9338 , Conf. on Air Quality Meteorology and Atmospheric Ozone; Jul 31, 1977 - Aug 06, 1977; Boulder, CO; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Geology orbiter comparison study (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Instrument requirements of planetary geology orbiters were examined with the objective of determining the feasibility of applying standard instrument designs to a host of terrestrial targets. Within the basic discipline area of geochemistry, gamma-ray, X-ray fluorescence, and atomic spectroscopy remote sensing techniques were considered. Within the discipline area of geophysics, the complementary techniques of gravimetry and radar were studied. Experiments using these techniques were analyzed for comparison at the Moon, Mercury, Mars and the Galilean satellites. On the basis of these comparative assessments, the adaptability of each sensing technique was judged as a basic technique for many targets, as a single instrument applied to many targets, as a single instrument used in different mission modes, and as an instrument capability for nongeoscience objectives.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-CR-155056 , SAI-1-120-399-S1
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    An analysis of the first two years of GASP data (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Distributions of mean ozone levels from the first two years of data from the NASA Global Atmospheric Sampling Program (GASP) show spatial and temporal variations in agreement with previous measurements. The standard deviations of these distributions reflect the large natural variability of ozone levels in the altitude range of the GASP measurements. Monthly mean levels of ozone below the tropopause show an annual cycle with a spring maximum which is believed to result from transport from the stratosphere. Correlations of ozone with independent meteorological parameters, and meteorological parameters obtained by the GASP systems show that this transport occurs primarily through cyclogenesis at mid-latitudes.
    Keywords: GEOPHYSICS
    Type: NASA-TM-73817 , E-9406 , Joint Conf. on Sensing of Environmental Pollutants; Nov 06, 1977 - Nov 11, 1977; New Orleans, LA; United States
    Format: application/pdf
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