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  • LUNAR AND PLANETARY EXPLORATION  (3,213)
  • GEOPHYSICS  (3,125)
  • METEOROLOGY AND CLIMATOLOGY  (1,773)
  • 1980-1984  (8,109)
  • 1900-1904  (2)
Collection
Keywords
Years
Year
  • 1
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    Results on the verification of satellite data based on a comparison with radiosonde data (1982)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Results of the verification of satellite wind data are represented by comparing them with radiosonde data for the geostationary satellites METEOSAT, GOES and GMS. The quality of METEOSAT pictures improved, reaching the quality of GOES and GMT wind data.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-TM-76691 , NAS 1.15:76691
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Voyages to Saturn (1982)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The Voyager mission to Saturn is explained in detail. A history of Saturn observations from ancient times to the present is given. The Voyager spacecraft and their instruments are described. An overview of planetary astronomy is presented. The text is supplemented by numerous black and white and color photographs. The Saturn satellites are discussed in detail, and preliminary pictorial maps of the satellites are given.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-SP-451 , NAS 1.21:451 , LC-81-600073
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Studies on the behavior of ammonia and ammonium salts in the atmosphere (1) - Fractional collection of ammonia gas and particulate ammonium (1981)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Methods for the fractional collection of trace amounts of atmospheric ammonia gas and ammonium particles on a two staged glass fiber filter are summarized. A standard glass fiber filter washed with distilled water and dried at 120 to 130 C was used. A second filter was impregnated with a mixture of 3% boric acid and 25% glycerin solution. The blank of glass fiber filters impregnated with a mixture of the above solution was very low for ammonia, i.e. 0.06 micrograms in a filter of 47 mm in diameter. The mean concentrations of ammonia and ammonium in air at Kawasaki, a polluted area, were 7.6 and 2.3 micrograms cu m, and those at Sanriku, an unpolluted area 0.9 and 0.2 micrograms cu m, respectively. Ratios of concentration levels of ammonium to total ammonia in the atmosphere were 0.3 and 0.2 for the polluted and unpolluted areas, respectively. Ammonium salts in air at both areas were not correlated with relative humidity. Variations in time of ammonia concentrations and sources in surrounding areas are also considered.
    Keywords: GEOPHYSICS
    Type: NASA-TM-76582
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Calculation of the attenuation and phase displacement per unit of length due to rain composed of ellipsoidal drops (1981)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: All of the phenomena which influence the propagation of radiowaves at frequencies above 10 GHz (attenuation, depolarization, scintillation) can by intensified by parameters directly derived from a solution of individual scatter, naturally in addition to be meteorological elements which characterize the physical medium. The diffusion caused by rainy precipitation was studied using Mie's algorithm for rain composed of spherical drops, and Oguchi's algorithm for rain composed of drops in an ellipsoidal form with axes of rotational symmetry arrange along the vertical line of a generic reference point. Specific phase displacement and attenuation along the principal planes, propagation of radiowaves in generic polarization, and propagation with inclined axes are also considered.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-TM-76592 , RIF-1B1778
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    The Viking seismometry (1981)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Efforts were made to determine the seismicity of Mars as well as define its internal structure by detecting vibrations generated by marsquakes and meteoroid impacts. The lack of marsquakes recognized in the Viking data made it impossible to make any direct inferences about the interior of Mars and only allowed the setting of upper bounds on the seismic activity of the planet. After obtaining more than 2100 hours worth of data during the quite periods at rates of one sample per second or higher, the Viking 2 seismometer was turned off as a consequence of a landing system failure. During the periods when adequate data were obtained, one event of possible seismic or meteoroid impact origin was recognized; however, there is a significant probability that this event was generated by a wind gust.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-CR-3408
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Method of determination of the mass composition of ring current ions (1980)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A method for individual registration of protons, and helium and oxygen ions, with energies E for a charge on the order of 100 kev/q in the ring currents of the Earth's magnetosphere was examined. The method is based on the various specific losses in energy by these ions in matter. The ion current, selected according to E/q, is passed through a solid target, after which identification of the masses is carried out, based on the energy losses in the possibly to reliably divide the flows of protons, and helium and oxygen ions.
    Keywords: GEOPHYSICS
    Type: NASA-TM-76246
    Format: application/pdf
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  • 7
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    Meteorite analysis assists search for life (1980)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-NEWS-RELEASE-80-21 , P80-10024
    Format: application/pdf
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  • 8
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    The International Halley Watch (1980)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: In preparation for the 1985 to 1986 apparition of Halley's Comet, the International Halley Watch (IHW) has initiated a comprehensive program to simulate, encourage, and coordinate scientific observation of the apparition. The observing groups with which the IHW plans to interact are discussed and the ground based observing nets are described in detail. An outline of the history of observations of Halley's Comet and a synopsis of comet properties and physics are included.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-TM-82181
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Meridional heat transport at the onset of winter stratospheric warming (1981)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A continuous vertical flow of energy toward high altitude was verified. This process produced a dynamic instability of the stratospheric polar vortex. A meridional heat transport ws primed toward the north, which generated a warming trend.
    Keywords: GEOPHYSICS
    Type: NASA-TM-76614
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Crater numbers and geological histories of Iapetus, Enceladus, Tethys and Hyperion (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The surfaces of the Saturn satellites Tethys, Iapetus and Encedalus display surfaces which indicate active geological processes and therefore suggest a degree of internal evolution. By contrast, the Saturn satellite Hyperion and the coorbitals 1980S1 and 1980S3 show no trace of geological activity and may be fragments of once-larger bodies. Activity on Iapetus appears to have been confined to the dark terrain, and offers no clue as to its timing and extent. The widest terrain type and crater number variations are those of Encedalus, which indicate the most prolonged period of geological activity of any of the satellites studied.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Nature; 301; Feb. 24
    Format: text
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