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  • GEOPHYSICS  (2,353)
  • Inorganic Chemistry  (768)
  • Analytical Chemistry and Spectroscopy  (485)
  • 1970-1974  (3,606)
  • 1973  (3,606)
Collection
Keywords
Publisher
Years
  • 1970-1974  (3,606)
Year
  • 1
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    Infrared scanning radiometer (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The Apollo 17 infrared scanning radiometer (ISR) experiment for mapping lunar surface thermal emission is reported. The instrument, lunar surface coverage, and the data obtained are discussed.
    Keywords: GEOPHYSICS
    Type: Apollo 17 Prelim. Sci. Rept.; 6 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Lunar atmospheric composition experiment (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: On the Apollo 17 mission, a miniature mass spectrometer, called the lunar atmospheric composition experiment (LACE), was carried to the moon as part of the Apollo lunar surface experiments package (ALSEP) to study the composition of and variation in the lunar atmosphere. The instrument was successfully deployed in the Taurus-Littrow valley with its entrance aperture oriented upward to intercept and measure the downward flux of gases at the lunar surface. Initial activation of the LACE instrument occurred on December 27, 1972, approximately 50 hr after sunset, and operation continued throughout the first lunar night. Sunrise brought a high background gas level and necessitated discontinuing operation during lunar daytime except for a brief check near noon. Near sunset, operation was resumed and continued throughout the night. This sequence was repeated for the second and third lunations.
    Keywords: GEOPHYSICS
    Type: NASA. Johnson Space Center Apollo 17 Prelim. Sci. Rept.; 9 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Atmospheric electricity (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-02
    Description: Atmospheric electricity must be considered in the design, transportation, and operation of aerospace vehicles. The effect of the atmosphere as an insulator and conductor of high voltage electricity, at various atmospheric pressures, must also be considered. The vehicle can be protected as follows: (1) By insuring that all metallic sections are connected by electrical bonding so that the current flow from a lightning stroke is conducted over the skin without any gaps where sparking would occur or current would be carried inside; (2) by protecting buildings and other structures on the ground with a system of lightning rods and wires over the outside to carry the lightning stroke into the ground; (3) by providing a zone of protection for launch complexes; (4) by providing protection devices in critical circuits; (5) by using systems which have no single failure mode; and (6) by appropriate shielding of units sensitive to electromagnetic radiation.
    Keywords: GEOPHYSICS
    Type: Terrest. Environ. (Climatic) Criteria Guidelines for Use in Aerospace Vehicle Develop., 1973 Rev.; 28 p
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  • 4
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    Atmospheric attenuation relative to earth-viewing orbital sensors (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-02
    Description: Earth viewing space missions offer exciting new possibilities in several earth resources disciplines - geography, hydrology, agriculture, geology, and oceanography, to name a few. A most useful tool in planning experiments and applying space technology to earth observation is a statistical description of atmospheric parameters. Four dimensional atmospheric models and a world wide cloud model are used to produce atmospheric attenuation models to predict degradation effects for all classes of sensors for application to earth sensing experiments from spaceborne platforms. To insure maximum utility and application of these products, the development of an interaction model of microwave energy and atmospheric variables provides a complete description of the effects of atmospheric moisture upon microwaves.
    Keywords: GEOPHYSICS
    Type: Terrest. Environ. (Climatic) Criteria Guidelines for Use in Aerospace Vehicle Develop., 1973 Rev.; 21 p
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  • 5
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    The origin of intermediate and deep focus earthquakes (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-26
    Description: An elastic plate model is used to describe the origin of intermediate and deep earthquakes. It is shown that the earth is covered by about eight tectonic plates that have relative motions; along plate boundary lines, one plate thrusting under the other, causes deflection and buckling of the elastic plate structure in regions of maximum curvature that may trigger earthquakes.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci.; p 220-223
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  • 6
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    Polar motion (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-26
    Description: Tracking of the Beacon Explorer-C satellite by a precision laser system was used to measure the polar motion and solid earth tide. The tidal perturbation of satellite latitude is plotted as variation in maximum latitude in seconds of arc on earth's surface as a function of the date, and polar motion is shown by plotting the variation in latitude of the laser in seconds of arc along the earth's surface as a function of date
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci.; p 216-219
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  • 7
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    A detailed gravimetric geoid of North America, the North Atlantic, Eurasia, and Australia (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-26
    Description: A computer program was developed for the calculation of a goid based upon a combination of satellite and surface gravity data. A detailed gravimetric geoid of North America, the North Atlantic, Eurasia, and Australia was derived by using this program.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci.; p 212-215
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  • 8
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    Earth physics, overview (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-26
    Description: Satellite applications in earth and ocean dynamic studies are considered for: earthquake hazard assessment and alleviation; prediction of general ocean circulation, surface currents, and heat transport; monitoring of transient phenomena of the ocean surface, such as sea state and wave conditions, wind-surface interactions and storm searches; and refinement of the global geoid, the gravity and magnetic fields of the earth.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci.; p 211
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  • 9
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    Tides in the upper atmosphere: A controversy resolved? (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-26
    Description: Diurnal temperature variations in the upper atmosphere are caused by heating resulting from the absorption of solar energy by ozone near the stratopause and by water vapor in the troposphere. Theoretical temperature variations given as a function of time and height show a discrepancy for the maximum temperature variation. A comprehensive set of acoustic grande soundings establish phase changes with altitude in agreement with the theory although times of maximum and minimum are not aligned at all altitudes.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci.; p 205-208
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  • 10
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    Effects of the atmosphere on ERTS observations (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-26
    Description: Atmospheric radiation models and methods of computing radiation effects are reported that are important both in the meteorological and Earth Resources Satellite programs. Results of using them to compute the atmospheric effects on just the ERTS observations are presented.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci.; p 193-195
    Format: text
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