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  • Other Sources  (3)
  • 1
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    A further proposal for additional regions for the Flinn-Engdahl Regionalization Scheme (1990)
    In:  Geophys. J. Int., Corvallis, x + 406 pp., Oregon State University Press, vol. 103, no. 1, pp. 759-762, pp. L13610, (ISSN: 1340-4202)
    Details
    Publication Date: 1990
    Keywords: Seismicity ; Seismology ; Location ; GJI
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Measurement of optical modulation functions in sparsely sampled mosaic focal plane arrays (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: It is pointed out that the measurement of optical modulation functions for detectors in focal plane arrays may be somewhat more difficult under 'full-up' systems conditions as compared to ideal laboratory conditions. An idealized optical modulation test arrangement is considered along with a full-up scanned system involving an earth mapper in polar orbit. In testing the system in full-up condition, a problem arises with respect to the acquisition of knife edge response data. In order to overcome this problem, a preferred method is developed for obtaining KER data on a single scan. A special 'phased edge' reticle is developed for use in the test set-up. Attention is given to aspects of knife edge reconstruction.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
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    NASA TECHNICAL REPORTS
  • 3
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    Precise Measurement of Effective Focal Length (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Computerized instrument measures effective focal lengths to 0.01 percent accuracy. Laser interferometers measure mirror angle and stage coordinate y in instrument for accurate measurment of focal properties of optical systems. Operates under computer control to measure effective focal length, focal surface shape, modulation transfer function, and astigmatism.
    Keywords: PHYSICAL SCIENCES
    Type: GSC-12745 , NASA Tech Briefs (ISSN 0145-319X); 7; 3; P. 267
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    NASA TECHNICAL REPORTS
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