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  • 1
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    Practical utility of the blue spectral region (1972)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Some aspects of multispectral photography in the blue region are discussed briefly, and sample images are submitted to demonstrate the potential utility of the blue multispectral record for oceanography.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Manned Spacecraft Center 4th Ann. Earth Resources Program Rev., Vol. 4; 29 p
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    A unique method of leak-rate measurements. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Description of an acceptable method for precision helium leak-rate measurement, for rather large pressurized vessels. Precise leakage rates of gaseous helium were measured by adapting a nominal helium leak detector in such a way that the gas load of the vacuum system plus the test vessel could be handled by the augmented pumping equipment while still being traced through the incorporated mass spectrometer. The vacuum chamber used for this experiment was maintained in 100 ntorr pressure range with a foreline pressure of 4 microns. Although sensitivity of the leak detector was diminished by reason of the larger pumping system, this did not affect the overall result in the capture and measurement of a complete leakage rate.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Journal of Environmental Sciences; 16; May-June
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Soft X-ray and XUV imaging with a charge-coupled device /CCD/-based detector (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: A soft X-ray/XUV imaging camera which uses a thinned, back-illuminated, all-buried channel RCA CCD for radiation sensing has been built and tested. The camera is a slow-scan device which makes possible frame integration if necessary. The detection characteristics of the device have been tested over the 15-1500 eV range. The response was linear with exposure up to 0.2-0.4 erg/sq cm; saturation occurred at greater exposures. Attention is given to attempts to resolve single photons with energies of 1.5 keV.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Solid state imagers for astronomy; June 10, 11, 1981; Cambridge, MA
    Format: text
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    NASA TECHNICAL REPORTS
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