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  • Other Sources  (3)
  • 1980-1984  (3)
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  • 1
    facet.materialart.
    Unknown
    The Sacramento Peak fast microphotometer (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The Sacramento Peak Observatory Fast Microphotometer translates an optical system that includes a laser and photodiode detector across the film to scan the Y direction. A stepping motor moves the film gate in the X direction. This arrangement affords high positional accuracy, low noise (0.002 RMS density units), modest speed (5000 points/second), large dynamic range (4.5 density units), high stability (0.005 density units), and low scattered light. The Fast Microphotometer is interfaced to the host computer by a 6502 microprocessor.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Goddard Space Flight Center Astron. Microdensitometry Conf.; p 243-254
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Beyond face validity - A comment on Nicholls, Licht, and Pearl (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: In their discussion of the Bem Sex Role Inventory (BSRI; Bem, 1974) and the Personal Attributes Questionnaire (PAQ; Spence and Helmrich, 1978), Nicholls, et al. (1982) blur two issues. The first concerns the legitimacy of equating the clusters of gender-related personality traits tapped by these instruments with the global constructs of masculinity and feminity. The second concerns item similarity between the PAQ and BSRI M scales and measures of self-esteem and the question of whether the several instruments measure the same or separable constructs. Decisions about each of these issues involve complex considerations that do not directly involve face validity.
    Keywords: BEHAVIORAL SCIENCES
    Type: Psychological Bulletin (ISSN 0033-2909); 94; 1 19
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Unknown
    Image motion compensation on the Spacelab 2 Solar Optical Universal Polarimeter /SL2 SOUP/ (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The SOUP experiment on Spacelab 2 includes a 30 cm visible light telescope and focal plane package mounted on the Instrument Pointing System (IPS). Scientific goals of the experiment dictate pointing stability requirements of less than 0.05 arcsecond jitter over periods of 5-20 seconds. Quantitative derivations of these requirements from two different aspects are presented: (1) avoidance of motion blurring of diffraction-limited images; (2) precise coalignment of consecutive frames to allow measurement of small image differences. To achieve this stability, a fine guider system capable of removing residual jitter of the IPS and image motions generated on the IPS cruciform instrument support structure has been constructed. This system uses solar limb detectors in the prime focal plane to derive an error signal. Image motion due to pointing errors is compensated by the agile secondary mirror mounted on piezoelectric transducers, controlled by a closed-loop servo system.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: Seminar on Shuttle pointing of electro-optical experiments; Feb 10, 1981 - Feb 13, 1981; Los Angeles, CA
    Format: text
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    NASA TECHNICAL REPORTS
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