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  • Other Sources  (6)
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  • 1
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    Differential degradation of Martian impact basins (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: Among the major problems of martian geologic history are the cause of the highland-lowland dichotomy, and of the scarp separating these two global-scale provinces. These features were formed after much of the early bombardment was completed; consequently, many of the surviving impact basins very likely were present during the creation of the dichotomy, and it is possible that differences in their present morphologies as a function of location and of relative age may provide clues to the tectonic and geomorphic processes responsible for the dichotomy and the scarp.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Rept. of Planetary Geol. Program, 1983; p 100-101
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Theoretical and Experimental Studied of the Thermal Behavior of a Linear Electro-Mechanical Device (1994)
    In:  Other Sources
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    Publication Date: 2018-06-08
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Newly Discovered Martian Impact Basins (1985)
    In:  CASI
    Details
    Publication Date: 2014-10-08
    Description: Three previously unrecognized Martian impact basins were discovered through detailed mapping of landforms, structures and terrains near Cassini and Al Qahira basins. Al Qahira A lies on the Martian dichotomy boundary and intersects the older basin, Al Qahira. It has four rings that are expressed by a variety of landforms. Southwestward Al Qahira A is out by a younger Basin, Al Qahira B. Al Qahira B is a highly degraded basin with one identifiable ring. Its ring is expressed by a few massifs, knobs and inward-facing scarps, but is recognized by the distributions of wrinkle ridges and plains units. Cassini A lies southward of the younger Cassini Basin and is intersected by it. It probably has four rings. The importance of detailed mapping of various types of landforms and terrains to the discovery of basins on Mars are demonstrated.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA, Washington Repts. of Planetary Geol. and Geophys. Program, 1984; p 200-201
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    High Precision Piezoelectric Linear Motors for Operations at Cryogenic Temperatures and Vacuum (1995)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Description: The use of an electromechanical device for optically positioning a mirror system during the pre-project phase of the Pluto Fast Flyby mission was evaluated at JPL. The device under consideration was a piezoelectric driven linear motor functionally dependent upon a time varying electric field which induces displacements ranging from submicrons to millimeters with positioning accuracy within nanometers.
    Keywords: Engineering (General)
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Martian impact basins: Morphology differences and tectonic provinces (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Detailed geomorphic and structural mapping of five Martian basins and preliminary study of eleven other basins reveal four characteristic styles of modification that relate to the degree and age of past tectonic activity. Within regions that exhibit no evidence for tectonic activity, the modification style can be used to distinguish areas dominated by different exogenic processes. A framework for understanding these different styles of basin modification is provided.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-CR-174074 , NAS 1.26:174074 , LPI-CONTRIB-537
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    High Precision Piezoelectric Linear Motors for Operations at Cryogenic Temperatures and Vacuum (1995)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The Jet Propulsion Laboratory evaluated the use of an electromechanical device for optically positioning a mirror system during the pre-project phase of the Pluto-Fast-Flyby (PFF) mission. The device under consideration was a piezoelectric driven linear motor functionally dependent upon a time varying electric field which induces displacements ranging from submicrons to millimeters with positioning accuracy within nanometers. Using a control package, the mirror system provides image motion compensation and mosaicking capabilities. While this device offers unique advantages, there were concerns pertaining to its operational capabilities for the PFF mission. The issues include irradiation effects and thermal concerns. A literature study indicated that irradiation effects will not significantly impact the linear motor's operational characteristics. On the other hand, thermal concerns necessitated an in depth study.
    Keywords: Engineering (General)
    Type: 13th Smart Actuator Symposium, Pennsylvania State University; Apr 01, 1995
    Format: text
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    NASA TECHNICAL REPORTS
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