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  • LUNAR AND PLANETARY EXPLORATION  (1,262)
  • 1980-1984  (1,262)
  • 1983  (552)
  • 1982  (710)
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  • 1980-1984  (1,262)
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  • 1
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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
  • 2
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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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  • 3
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    Reports of Planetary Geology Program, 1982 (1982)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Work conducted in the Planetary Geology program is summarized. The following categories are presented: outer solar system satellites; asteroids and comets; Venus; cratering processes and landform development; volcanic processes and landforms; aolian processes and landforms; fluvial processes and landform development; periglacial and permafrost processes; structure, tectonics and stratigraphy; remote sensing and regolith studies; geologic mapping, cartography and geodesy.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-TM-85127 , EL-4 , NAS 1.15:85127
    Format: application/pdf
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  • 4
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    Advances in Planetary Geology (1982)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Advances in Planetary Geology is a new series intended to serve the planetary geology community with a form for quick and thorough communications. There are no set lists of acceptable topics or formats, and submitted manuscripts will not undergo a formal review. All submissions should be in a camera ready form, preferably spaced, and submitted to the editor.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-TM-84894 , EL-4 , NAS 1.15:84894
    Format: application/pdf
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  • 5
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    Planetary exploration program through the year 2000 - A progress report (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: This paper covers the solar system exploration committee including their recommendations and plan options, and study approach. Also included are: planetary and solar system exploration program; thrusts, methodology, goals, recent history, approach to reduce costs/increase efficiency, spacecraft, recent problems, and plans for FY 1982. All of the different program ingredients are emphasized.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: AAS 81-337 , Leadership in space for benefits on earth; Oct 26, 1981 - Oct 29, 1981; San Diego, CA
    Format: text
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  • 6
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    Construction of a model of the Venus surface and its use in processing radar observations (1983)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: An algorithm is described for constructing the model of the Venus surface as an expansion in spherical functions. The relief expansion coefficients were obtained up to the coefficient S sub 99. The surface picture representation is given according to this expansion. The surface model constructed was used for processing radar observations. The use of the surface model allows improved agreement between the design and measured values of radar ranges.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-TM-77298 , NAS 1.15:77298
    Format: application/pdf
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  • 7
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    Etching of moldavities under natural conditions (1983)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The hypothesis that a part of the lechatellierites which originated by etching from a basic moldavite mass became broken off after deposition of moldavite in the sedimentation layer is advanced. Those found close to the original moldavite were measured for statistical averaging of length. The average length of lechatelierite fibers per cubic mm of moldavite mass volume was determined by measurement under a microscope in toluene. The data were used to calculate the depth of the moldavite layer that had to be etched to produce the corresponding amount of lechatelierite fragments. The calculations from five "fields" of moldavite surface, where layers of fixed lechatelierite fragments were preserved, produced values of 2.0, 3.1, 3.5, 3.9 and 4.5. Due to inadvertent loss of some fragments the determined values are somewhat lower than those found in references. The difference may be explained by the fact that the depth of the layer is only that caused by etching after moldavite deposition.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-TM-77334 , NAS 1.15:77334
    Format: application/pdf
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  • 8
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    The detection of X rays from Jupiter (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: X rays in the energy band 0.2-3.0 keV have been detected coming from both polar regions of Jupiter. The observations were made in 1979 and 1981 by using the imaging proportional counter and high resolution imaging detectors on the Einstein X-ray astronomy satellite. The measured flux density of approximately 0.0006/sq cm-sec at earth corresponds to an X ray luminosity of approximately 4 x 10 to the 9th W in the 0.2- to 3.0-keV energy band. The energy spectrum of the X rays is extremely soft and can be characterized by a power law with an exponent of approximately 2.3. Detector energy resolution is insufficient to distinguish a soft line spectrum from a continuum. However, the shape of the response and the observed X ray power indicate that the source of this auroral emission is not electron bremsstrahlung as on the earth, but is most probably line emission from O and S ions with energies between 0.03 and 4.0 MeV/nucleon precipitating from the outer boundary of the Io plasma torus at L approximately 8.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research (ISSN 0148-0227); 88; Oct. 1
    Format: text
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  • 9
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    Calibration of the radiometric asteroid scale using occultation diameters (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The paper describes a new approach to the calibration of the radiometric asteroid scale, which relies on recent accurate occultation measurements of the diameters of 2 Pallas (Wasserman et al., 1979) and 3 Juno (Millis et al., 1981), and the Voyager diameter of J4 Callisto, as well as IR photometry of these objects obtained with the NASA 3-m Infrared Telescope Facility. It is shown that this calibration is internally consistent to better than 5%, and probably has an absolute accuracy of + or - 5%. It is noted that a revision of the TRIAD radiometric diameters downward is required to bring them into agreement with the new calibration.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Icarus; 52; Oct. 198
    Format: text
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  • 10
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    The Cambridge photographic atlas of the planets (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The origin of the solar systems is considered along with the formation of the planets, the evolution of the planets, the surfaces of solid planets, and the atmosphere of the planets. A description is provided of the various planets of the solar system. It is pointed out that Mercury was little known until March 1974 when the Mariner 10 spacecraft made the first of its three flybys of that body. In the case of Venus, the Pioneer mission to Venus by NASA in 1978 provided a breakthrough concerning a knowledge of the solid body hidden beneath the clouds. The characteristics of the planet earth are discussed together with information about the moon. A shaded relief map of Mars illustrates the geographic features of this planet. The map was produced with the aid of Mariner 9 photographs. Maps of the Jovian system based on photographs provided by space missions are also presented, and the Saturnian system is discussed, taking into account major satellites and rings of Saturn.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Format: text
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