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  • 1
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    Revised Pioneer 10 absolute electron intensities in the inner Jovian magnetosphere (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Improved techniques for the analysis of Pioneer 10 Jupiter encounter data are used to obtain significantly more reliable values for energetic electron (Ee less than 21 MeV) intensities within the inner magnetosphere. The revised absolute intensities of electrons in the energy range 0.06-21 MeV are less than previous estimates by factors as great as 10 for L not exceeding 6. Previously published intensities at greater radial distances for Ee less than 21 MeV and at all radial distances for Ee greater than 21 MeV are not affected by the revisions.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research; 82; Feb. 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Morphometry of streamlined forms in terrestrial and Martian channels (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Streamlined erosional forms in the Channeled Scabland are compared with streamline features recognized in the region of the Kasei Vallis on Mars shown in Viking imagery. The morphometric analysis considers three physical parameters, length, measured parallel to the suggested flow direction; width, taken as the maximum width of the streamlined form perpendicular to the flow direction; and area, measured with a grid placed over the surface. These parameters are used to calculate a dimensionless parameter k, defined as the square of the length multiplied by pi over four times the area. For the 137 Scabland forms studied k values range from 1.0 to 8.3 with an average of 3.2. The k values for 47 Martian streamlined forms range from 1.5 to 12.0 with an average of 3.8. The rough similarity of these results suggests that the terrestrial and Martian features were formed by similar processes. The forms appear to have developed an ideal shape, sufficiently elongated to reduce pressure drag in the fluid creating them, but not so long as to create excessive skin resistance.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Lunar and Planetary Science Conference; Mar 13, 1978 - Mar 17, 1978; Houston, TX
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Morphological mapping of Martian outflow channels (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Geomorphic mapping of selected portions of Martian outflow channels was performed in order to facilitate comparisons to terrestrial landforms. We interpret the maps to illustrate a correspondence between Martian channel features and terrestrial landforms developed by catastrophic flood erosion in the Channeled Scabland. The following features all occur in remarkably similar arrangements on the flood-channel floors of both planets: streamlined uplands, longitudinal grooves, scour marks, inner channel cataracts, etched zones, and possible pendant bars.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Lunar and Planetary Science Conference; Mar 13, 1978 - Mar 17, 1978; Houston, TX
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    A preliminary assessment of the fluid erosional processes that shaped the Martian outflow channels (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Catastrophic floods may be the mechanism which created Martian outflow channels and the distinctive assemblage of channel landforms, including regional and local anastomosing patterns, expanding and contracting reaches correlated with flow constrictions, streamlined uplands, inner channels with recessional headcuts, pendant forms on the downcurrent sides of flow obstacles, and scour marks around the obstacles. A terrestrial landscape which contains analogs to all the Martian outflow features is the Channeled Scabland of eastern Washington, formed by catastrophic flooding across differentially resistant basalt, loess and sedimentary rock. Both hydrodynamic theory and the properties of the boundary undergoing deformation need to be considered in studying the forms that result from catastrophic flooding.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Lunar and Planetary Science Conference; Mar 13, 1978 - Mar 17, 1978; Houston, TX
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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