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  • INSTRUMENTATION AND PHOTOGRAPHY  (107)
  • SPACE VEHICLES  (69)
  • CHEMISTRY  (41)
  • ASTROPHYSICS
  • Animals
  • ENERGY PRODUCTION AND CONVERSION
  • 2015-2019
  • 1980-1984
  • 1970-1974  (218)
  • 1973  (218)
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Keywords
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  • 2015-2019
  • 1980-1984
  • 1970-1974  (218)
Year
  • 1
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    Carbon monoxide detector (1973)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A sensitive carbon monoxide detector, developed specifically for spacecraft use, is described. An instrument range of 0 to 60 ppm CO in air was devised. The fuel cell type detector is used as a highly sensitive electrolysis cell for electrochemically detecting gases. The concept of an electrochemical CO detector is discussed and the CO oxidation behavior in phosphoric and sulfuric acid electrolytes is reported.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-120171
    Format: application/pdf
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  • 2
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    Classical dynamical investigations of reaction mechanism in three-body hydrogen-halogen systems. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Keywords: CHEMISTRY
    Type: Journal of Chemical Physics; 58; Apr. 1
    Format: text
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  • 3
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    Fluorinated esters of polycarboxylic acids (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Fluorine containing esters of polycarboxylic acids are discussed. The use of these esters as extreme temperature lubricants and base fluids for greases is investigated.
    Keywords: CHEMISTRY
    Format: application/pdf
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  • 4
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    Analysis of the dynamics and frequency spectrum synthesis of an optical-mechanical scanning device (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-28
    Description: A two-coordinate optical-mechanical scanning device (OMSD), the operating unit of which is a scanning disk, with directional and focusing optics and a board, on which the data carrier is placed, is examined. The disk and board are kinematically connected by a transmission mechanism, consisting of a worm and complex gear drive and a tightening screw-nut with correcting device, and it is run by a synchronous type motor. The dynamic errors in the system depend, first, on irregularities in rotation of the disk, fluctuations in its axis and vibrations of the table in the plane parallel to the plane of the disk. The basic sources of the fluctuations referred to above are residual disbalance of the rotor and other rotating masses, the periodic component of the driving torque of the synchronous motor, variability in the resistance, kinematic errors in the drive and other things. The fluctuations can be transmitted to the operating units through the kinematic link as a flexural-torsional system, as well as through vibrations of the housing of the device.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Cybernetic Diagnostics of Mech. Systems with Vibro-acoustic Phenomena (NASA-TT-F-14899); p 301-305
    Format: text
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  • 5
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    Mariner 9 ultraviolet spectrometer experiment: Seasonal variation of ozone on Mars (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-27
    Description: On Mars, the Mariner observations show a twenty-fold variation in the amount of ozone, depending on the presence or absence of another minor constituent, water vapor, in the atmosphere. In the evolution of earth's primitive atmosphere, the formation of an ozone layer may have played an important role in the prebiotic chemistry that took place on the surface. The seasonal formation and disappearance of ozone in the contemporary Martian atmosphere may be of consequence in any prebiotic chemistry that may be occurring there.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: JPL Mariner Mars 1971 Proj., Vol. 4; p 369-372
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  • 6
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    A high-resolution Fourier-transform infrared spectrometer. (1973)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: We have developed a Fourier-transform infrared spectrometer having a resolution of 0.5/cm over the range of wavelength from 1 to 5.5 microns. It has been used to observe the sun over this wavelength range from a Lear Jet flying at an altitude of 14 km, and to observe a number of stars from the ground, using the 229-cm telescope of the Steward Observatory and the 152-cm aluminum-mirror telescope at the Observatorio Astronomico Nacional in the Sierra de San Pedro Martir, Baja California, Mexico. The solar spectrum is given here, while the ground-based spectra are being published separately.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Astronomical Society of the Pacific; vol. 85
    Format: text
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  • 7
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    He, Ne and Ar in chondritic Ni-Fe as irradiation hardness sensors. (1973)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Noble gas analyses of the Ni-Fe of 9 L, 5 H, and 2 LL chondrites quantitatively support previous suggestions of radiogenic He-4 recoil and He-3 deficits. Furthermore, noble gases in the Ni-Fe show evidence for in situ produced radiogenic He-4 and in some cases for recoil loss of Ar-38 and gain of Ne-21. The ratio of spallogenic Ar-38 and Ne-21 in the metal phase is found to correlate strongly with He-3/Ne-21 and Ne-22/Ne-21 in bulk samples of these chondrites. This is proof of the dependence of these ratios on the irradiation hardness experienced by the meteoroid in space. 'Hardness indices' n equals 1.9-2.2 are found, indicating that on the average the stone meteoroids from which the samples came were smaller in mass than iron meteoroids. The spallogenic Ne-21/Ar-38 ratio in metallic Ni-Fe can be used with the semi-empirical production model deduced from the Grant iron meteorite to calibrate spallogenic He-3/Ne-21 and Ne-21/Ar-38 in bulk samples of L, LL and H chondrites for meteoroid size and sample location allowing the estimation of minimal meteoroid masses.
    Keywords: CHEMISTRY
    Type: Geochimica et Cosmochimica Acta; 37; July 197
    Format: text
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  • 8
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    Holographic motion picture camera allows front surface detail to be recorded in real time using a continuous wave laser. (1973)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Applied Optics; 12; Apr. 197
    Format: text
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  • 9
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    Anisotropic detector system for the measurement of gamma-ray source position (1973)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Detection efficiencies of cylindrical detectors for various gamma ray photon angular distributions in the energy range from .10 MeV to 15 MeV are studied. It was found that a properly chosen cylindrical crystal can produce a significantly modulated count rate as a function of angle when rotated in the anisotropic flux, The studies further indicate that simple detector systems can be used on small satellites for the determination of a gamma ray source position. Results are outlined and extended to examine source resolution angles for a practical size detector.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Goddard Contrib. to the Los Alamos Conf. on Transient Cosmic Gamma and X-ray Sources; 10 p
    Format: text
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  • 10
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    Investigation of atmospheric effects in image transfer (1973)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Investigations have been directed mainly toward: (1) theoretical work oriented toward computations of the effects of atmospheric aerosols on the transfer of images through the atmosphere; (2) measurements of the polarization field in the cloud-free atmosphere as an indicator of the existence and characteristics of atmospheric aerosols; and (3) the design of a video-polarizer system for the detection and display of the polarization field of light utilized in remote sensing of the environment. In addition, a camera system is under development for characterizing the polarization properties of a scene (landscape, city, etc.) by photographic means.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: An Integrated Study of Earth Resources in the State of Calif. Using Remote Sensing Tech.; 33 p
    Format: text
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