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  • 1
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    Global auroral imaging instrumentation for the Dynamics Explorer Mission (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The instrumentation for obtaining global images of the auroral oval from the high-altitude spacecraft of the Dynamics Explorer Mission is described. It is noted that the three spin-scan auroral imaging photometers are expected to be able to effectively view the dim emissions from earth in the presence of strong stray light sources near their fields-of-view along the sunlit portion of the spacecraft orbit. A special optical design that includes an off-axis parabolic mirror as the focusing element and super-reflecting mirror surfaces is used to minimize the effects of stray light. The rotation of the spacecraft and an instrument scanning mirror provide the two-dimensional array of pixels making up an image frame. It is pointed out that the full width of the fields-of-view of the photometers corresponding to a single pixel is 0.29 deg and that the angular dimensions of a typical full frame are 30 deg x 30 deg and span 14,400 pixels.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: AD-A120637 , Space Science Instrumentation; 5; Dec. 198
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Quadrispherical LEPEDEAS for ISEE's-1 and -2 plasma measurements (1978)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: A new generation of spaceflight instrumentation for comprehensive measurements of plasmas within the earth's magnetosphere and its environs is described. These quadrispherical low energy proton and electron differential energy analyzers (LEPEDEAS) for the ISEE's-1 and -2 spacecraft are capable of determining the directional intensities of positive ions and electrons over all but 2 percent of the 4 pi sr solid angle for charged-particle velocity vectors at the spacecraft positions. The energy range of this instrumentation is E/Q of 1 eV to 45 keV with good energy and angular resolutions. An example of inflight observations within the earth's magnetosheath is presented.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: IEEE Transactions on Geoscience Electronics; GE-16; July 197
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    NASA TECHNICAL REPORTS
  • 3
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    The plasma instrumentation for the Galileo Mission (1992)
    In:  Other Sources
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    Publication Date: 2019-07-12
    Description: The Galileo Mission's plasma instrumentation package encompasses a nested set of four spherical-plate electrostatic analyzers and three miniature magnetic mass spectrometers which identify the composition of the positive ion plasmas; the spectrometers' energy range is species-dependent. Two instrument microprocessors allow in-flight implementation of operational modes by ground command that are tailored for such specific regimes as the magnetosheath and the plasma sheet of the environs of Jupiter. Observational objectives include field-aligned currents, 3D ion bulk flows, Galilean satellite pickup ions, and the spatial distributions of plasmas.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: Space Science Reviews (ISSN 0038-6308); 60; 4-Jan
    Format: text
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    NASA TECHNICAL REPORTS
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