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  • INSTRUMENTATION AND PHOTOGRAPHY  (4)
  • SPACECRAFT INSTRUMENTATION  (2)
  • 1
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    A spectroscopic method for calibration of solar extreme ultraviolet instrumentation (1983)
    In:  Other Sources
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    Publication Date: 2011-08-18
    Description: A method of calibrating solar extreme ultraviolet spectrographs in space using coronal emission lines of known relative intensity is presented and demonstrated. This approach is useful for recalibrating orbiting instruments that may be subject to degradation during extended periods of operation. The calibration results are insensitive to the physical distribution of emitting plasma in any likely solar coronal source. It is suggested that this technique may be useful for calibration of spectrographs used in the study of laboratory plasmas.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: Astronomy and Astrophysics (ISSN 0004-6361); 128; 1, No
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    NASA TECHNICAL REPORTS
  • 2
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    Multiple element soft x-ray source. (1965)
    In:  Other Sources
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    Publication Date: 2011-08-10
    Description: Multiple element soft X-ray source for study of soft X-ray region of electromagnetic spectrum, obtaining absolute photon yield of carbon K and boron K
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
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  • 3
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    Aging properties of Kodak type 101 emulsions (1984)
    In:  Other Sources
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    Publication Date: 2011-08-18
    Description: Aging tests for several batches of Kodak type 101 emulsion show that storage conditions significantly influence how well the film will maintain its sensitometric properties, with sensitivity and density increasing to a maximum during this period. Any further aging may result in higher fog levels and sensitivity loss. It is noted that storage in an environment free of photographically active compounds allows film property optimization, and that film batches with different sensitivities age differently. Emulsions with maximum 1700-A sensitivity are 2.5 times faster than those at the low end of the sensitivity scale. These sensitive emulsions exhibit significantly accelerated changes in aging properties. Their use in space applications requires careful consideration of time and temperature profiles, encouraging the use of less sensitive emulsions when the controllability of these factors is limited.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Applied Optics (ISSN 0003-6935); 23; 589-596
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  • 4
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    The GSFC EUV and X-ray spectroheliograph on OSO-7 (1974)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: The Goddard Space Flight Center instrument carried on the pointed section of the OSO-7 satellite is described. This instrument contains: an extreme-ultraviolet spectroheliograph using glancing incidence optics of Wolter's Type II to focus the sun's light on the entrance slit of a concave grating spectrometer; an auxiliary H-alpha system; two X-ray spectroheliographs using mechanical collimators for spatial resolution and Ross filters to isolate spectral bands of interest; and a flare polarimeter operating in the 15-40 keV X-ray region. The subsystems may be operated in a number of modes which, when combined with the spacecraft modes, give the instrument great flexibility for making solar observations. Representative results from each of the subsystems are presented.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Solar Physics; 35; Apr. 197
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  • 5
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    Science on the Space Shuttle (1982)
    In:  Other Sources
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    Publication Date: 2019-08-28
    Description: On the Space Shuttle's third flight, scientific instruments will study the electromagnetic environment with charging and electron beams. Beam plasma discharge will be studied. The plasma diagnostics package contains electromagnetic and particle sensors to study the ionosphere. An attempt will be made to establish a more accurate base of solar UV irradiance measurements with an absolute error of 10 percent or less over the wavelength region 120-400 nm. The solar flare X-ray polarimeter will observe flare X-rays emitted between 5 and 30 keV and measure their polarization as a function of time and photon energy. A photopolarimeter will help study zodiacal light, and interplanetary dust will be sampled by a section of thick aluminum foil. Plant seedlings will be grown to research the effect of near-zero gravity on lignification. A thermal canister experiment will help determine whether instruments can be maintained at a fixed temperature under varying thermal loads.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: Nature; 296; Mar. 18
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  • 6
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    Glancing incidence optics for X-ray and ultraviolet astronomy. (1971)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: Glancing incidence telescopes of the kind first described by Wolter have now been physically realized, so that it is possible to obtain high-resolution images of celestial objects at all wavelengths greater than about 3 A. The GSFC-MSFC X-ray telescope for the Apollo telescope mount uses Wolter type 1 optics and is capable of forming images of the sun in the 8-70 A region with spatial resolution of the order of one arc second. The GSFC extreme ultraviolet spectroheliometer for OSO H uses type 2 optics and can obtain images of the sun in spectral lines in the 170-400 A region with a spatial resolution of about ten arc seconds. Theoretical (ray trace) and laboratory data on these systems are presented.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: New techniques in space astronomy; Symposium; Aug 10, 1970 - Aug 14, 1970; Munich
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