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  • INSTRUMENTATION AND PHOTOGRAPHY  (110)
  • 1980-1984  (110)
  • 1940-1944
  • 1983  (60)
  • 1980  (50)
  • 1
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    Application Explorer Mission 2 (AEM 2), Stratospheric Aerosol and Gas Experiment (SAGE) (1980)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA, Washington Upper Atmosphere Res. Program; p 234-235
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Short wavelength infrared hybrid focal plane arrays (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The employment of area focal plane arrays (FPA) has made it possible to obtain second generation infrared imaging systems with high resolution and sensitivity. The Short Wavelength Infrared (SWIR) region (1-2.5 microns) is of importance for imaging objects at high temperature and under conditions of reflected sunlight. The present investigation is concerned with electrooptical characterization results for 32 x 32 SWIR detector arrays and FPAs which are suitable for use in a prototype imaging spectrometer. The employed detector material is Hg(1-x)Cd(x)Te grown by liquid phase epitaxy on a CdTe transparent substrate. Attention is given to details of processing, the design of the detector array, the multiplexer, the fabrication of the hybrid FPA, and aspects of performance.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Technical issues in infrared detectors and arrays; April 5, 6, 1983; Arlington, VA
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Moire deflectometry with deferred analysis (1983)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: A simplified version of moire deflectometry for flow visualization is presented. The modification comprises replacement of the second grating, the ground glass screen, and the camera with a plate film holder to obtain a shadow picture. Postanalysis proceeds by placing a grid transparency of the same periodicity of the remaining glass grating on the negative for projection viewing. The rotational angle between the grating and the plate alters the moire fringe periodicity. Use of the method in studying flows is predicted to reveal weak density gradient areas and shocks.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Applied Optics; 22; Mar. 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Ride quality meter (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A ride quality meter is disclosed that automatically transforms vibration and noise measurements into a single number index of passenger discomfort. The noise measurements are converted into a noise discomfort value. The vibrations are converted into single axis discomfort values which are then converted into a combined axis discomfort value. The combined axis discomfort value is corrected for time duration and then summed with the noise discomfort value to obtain a total discomfort value.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Laser diagnostic methods - A summary (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: This is a summary and discussion of the state of the art in the use of laser diagnostics in fluid and plasma dynamics. This will encompass: interferometry, scattering, spectroscopy, and velocimetry. Examples of such applications will be provided in the area of fluid dynamics of particle generation and breakup, analysis of three-dimensional density fields, and applications in combustion.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: AIAA PAPER 83-1683
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Apparatus for continuous, fast, and precise measurements of position and velocity of a small spherical particle (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The position and velocity of optically levitated glass spheres (radii 10-20 microns) movng in a gas are measured accurately, rapidly, and continuously using a high-speed rotating polygon mirror. The experimental technique developed here has repeatable position accuracies better than 20 microns. Each measurement takes less than 1 microsec and can be repeated every 100 microsec. The position of the levitated glass spheres can be manipulated accurately by modulating the laser power with an acoustic optic modulator. The technique provides a fast and accurate method to study general particle dynamics in a fluid.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Review of Scientific Instruments (ISSN 0034-6748); 54; 1643-164
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Specifying and calibrating instrumentations for wideband electronic power measurements (1980)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The wideband electric power measurement related topics of electronic wattmeter calibration and specification are discussed. Tested calibration techniques are described in detail. Analytical methods used to determine the bandwidth requirements of instrumentation for switching circuit waveforms are presented and illustrated with examples from electric vehicle type applications. Analog multiplier wattmeters, digital wattmeters and calculating digital oscilloscopes are compared. The instrumentation characteristics which are critical to accurate wideband power measurement are described.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-TM-81545 , DOE/NASA/1044-8
    Format: application/pdf
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  • 8
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    Surface reflectance measurements in the UV from an airborne platform. I (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The reflectance of naturally occurring surfaces is measured from a twin engine Cessna 402B aircraft both spectrally (0.29-0.40 micron) with a compact double monochromator and broadband (0.29-1.2 micron) with a UV enhanced photodiode. The measurement system, which is computer controlled and electrically isolated from the aircraft, consists of upward and downward looking hemispheric diffusers, filters, a rotating 90 deg mirror, a focusing lens, and a double monochromator/PMT or the UV photodiode. Measurements are taken at several altitudes enabling the empirical determination of backscatter and attenuation effects on the reflectance. The results are presented for pine forest canopy, green farmland, open ocean, and brown farmland as a function of wavelength and altitude.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Applied Optics; 19; July 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    InSb charge coupled infrared imaging device: The 20 element linear imager (1980)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The design and fabrication of the 8585 InSb charge coupled infrared imaging device (CCIRID) chip are reported. The InSb material characteristics are described along with mask and process modifications. Test results for the 2- and 20-element CCIRID's are discussed, including gate oxide characteristics, charge transfer efficiency, optical mode of operation, and development of the surface potential diagram.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-3235
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Remote sensing of sediment and chlorophyll with the test-bed aircraft multispectral scanner (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: An instrument known as the test-bed aircraft multispectral scanner (TBAMS) was used in a research flight over the entrance to the Chesapeake Bay. Upwelled radiances from the TBAMS data were correlated with the water parameters, particularly sediment and chlorophyll a. Several algorithms were demonstrated for monitoring sediment and chlorophyll, with a three-band ratio being the best. The primary advantage of the three-band ratio was found to be its apparent insensitivity to atmospheric and Sun-angle variations.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-TM-84590 , L-15572 , NAS 1.15:84590
    Format: application/pdf
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