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  • GEOPHYSICS  (4,146)
  • Organic Chemistry  (2,055)
  • Life and Medical Sciences
  • 1970-1974  (6,943)
  • 1973  (3,330)
  • 1972  (2,066)
  • 1971  (1,547)
Collection
Keywords
Publisher
Years
  • 1970-1974  (6,943)
Year
  • 1973  (3,330)
  • 1972  (2,066)
  • 1971  (1,547)
  • 1974  (2,134)
  • 1970  (1,455)
  • 1
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    Organic geochemistry of Early Precambrian sediments (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-12-21
    Keywords: GEOPHYSICS
    Type: Life Sci. Publ., Vol. 2; 11 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Chemistry of the upper atmosphere and the role of transport processes (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The important chemical reaction affecting the neutral composition of the upper stratosphere, mesosphere, and lower thermosphere is discussed. The role of atmospheric transport processes is emphasized and the problem of taking these into account is elucidated.
    Keywords: GEOPHYSICS
    Type: NASA, Washington Phys. of the Space Environment; p 147-155
    Format: text
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  • 3
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    Transient heating in the upper atmosphere (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The time-dependent response of the upper atmosphere to transient heat sources is considered. The basic problem is that of heating a compressible, heat-conducting fluid, which is described in the one-dimensional case by an analytic solution. Comparisons with satellite drag data of such first-order solutions are shown to be useful in determining energy requirements and in determining some constraints on the spatial distribution of the heating. Recent OGO-6 mass spectrometer and interferometric temperature measurements show that atmospheric disturbances during geomagnetic storms are much more prominent in the auroral zones. These results suggest that joule dissipation of auroral currents are important contributors to orbital perturbations of satellites.
    Keywords: GEOPHYSICS
    Type: NASA, Washington Phys. of the Space Environment; p 3-23
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  • 4
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    Dissipation of electric fields in the ionosphere (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The heating and movement of the upper atmosphere at ionospheric levels in response to electric currents are discussed. Joule dissipation, generation of winds, and pressure gradients are significant factors in the energetics of the ionospheric electric currents flowing during magnetic storms and also of the Sq current system.
    Keywords: GEOPHYSICS
    Type: NASA, Washington Phys. of the Space Environment; p 25-40
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  • 5
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    Nimbus observation of oceanic upwelling (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Observing the development of upwelling on the northeast coast of Africa by measuring ocean surface emission with infrared radiometers on Nimbus satellites is reported. Using the temperature of the ocean as telemetered by the satellite, the biological potential of an area is estimated, and consequently the highest potential for fisheries.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci., 1970; p 14-17
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  • 6
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    Microwave emission of Arctic Sea ice (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The feasibility of carrying microwave radiometers on Nimbus E and F missions for sea ice surveys was studied in the arctic using aircraft. It was found that passive microwave signatures of Arctic Sea ice relate specifically to the structure and type of ice. It is concluded that a new tool for conducting ice surveys from aircraft and satellites with remote sensors was discovered.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci., 1970; p 18-21
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  • 7
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    Electron impact ionization of H (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The results of theoretical calculations for the reactions between electrons and negative hydrogen atoms are discussed for an electron colliding with a negative hydrogen ion and neutralizing the hydrogen ion by stripping the loosely bound electron from it, and the two free electrons moving away. A semi-quantum description of the process is presented in which the target is described in terms of quantum mechanics, and the projectile electron is described in a classical fashion.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci., 1970; p 58-62
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  • 8
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    Geological features in Wyoming from Nimbus 1 (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The identification of ground features in Nimbus photography by comparisons with geology, soils, and vegetation maps is discussed for the Wyoming-Colorado area. It is concluded that in a semiarid region, high topographic relief shows good coassociation with exposed geology and with vegetation and, to a lesser degree, with soils types. In lower, flatter basins, most tonal patterns are related to subtle variations in soil color and vegetation cover. It is thought that maps based on spectral parameters as the proper descriptor of surface features may be required.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci., 1970; p 2-7
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  • 9
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    On the heterodyne method of detecting gravitational waves (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: A mathematical model on the heterodyne method of detecting gravitational waves is presented, using a dumbbell consisting of two masses situated in a plane and a plane-fronted gravitational wave traveling perpendicular to the plane. It is concluded that the detector sensitivity is not likely to be improved without employing very complicated and expensive super low temperature techniques.
    Keywords: GEOPHYSICS
    Type: JPL Proc. of the Conf. on Exptl. Tests of Gravitation Theories; p 45-46
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  • 10
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    A cursory examination of the sensitivity of the tropospheric range and Doppler effects to the shape of the refractivity profile (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Ray tracing techniques for examination of refractivity profile sensitivity in tropospheric range and Doppler effects on profile shape
    Keywords: GEOPHYSICS
    Type: THE DEEP SPACE NETWORK, VOL. 1 15 FEB. 1971; P 22-30
    Format: text
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