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  • GEOPHYSICS  (1,182)
  • Animals
  • 1980-1984
  • 1970-1974  (1,182)
  • 1972  (1,182)
Collection
Keywords
Years
  • 1980-1984
  • 1970-1974  (1,182)
Year
  • 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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    NASA TECHNICAL REPORTS
  • 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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    NASA TECHNICAL REPORTS
  • 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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    Bearing strength of the lunar soil (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: A discussion is presented on the bearing strength and bearing load-penetration relations in lunar soil. These were measured in air as a function of bulk density. It was found that the relation between bulk density and the logarithm of the bearing capacity is about linear. Shapes of the load vs penetration curves were observed to be similar to those obtained with particulate material of terrestrial origin.
    Keywords: GEOPHYSICS
    Type: NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 227-232
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  • 9
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    Comparison of probe and radar ionosphere temperatures (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The discrepancy in temperature measurements of ionospheric electrons by Langmuir electrostatic probes, and radar backscatter are discussed. The discrepancy occurs at altitudes from 350 to 800km, and the probe temperatures are consistantly higher than the radar temperatures. It is concluded that the non-Maxwellian energy distribution provides an explanation for the altitude and the lower radar temperatures.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci., 1970; p 43-45
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  • 10
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    Microwave measurements of sea state (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Passive microwave measurements were studied for determining sea state. It was found that the brightness temperature increases due to the foam produced by winds, and that the surface wind can be determined by the brightness temperature.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci., 1970; p 22-27
    Format: text
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