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  • INSTRUMENTATION AND PHOTOGRAPHY  (51)
  • 2015-2019
  • 1990-1994  (9)
  • 1985-1989  (6)
  • 1970-1974  (36)
  • 1945-1949
  • 1
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    Absolute radiometry in space astronomy (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Precision radiometric and spectrometric intensity measurements for calibration of space telescopes
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA, WASHINGTON OPT. TELESCOPE TECHNOL. 1970; P 775-780
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  • 2
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    Backscattered ultraviolet measurements of ozone 1970-2000 - An overview (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The history of the Backscattered Ultraviolet Experiment (BUV) is recounted and related future efforts are discussed. Satellite measurement of backscattered UV radiation will be the major source of long-term global information about total ozone and ozone profiles for the rest of this century. These measurements started with the BUV experiment flown on Nimbus 4 from 1970 to 1977 and are presently being continued with the Solar and Backscattered Ultraviolet/Total Ozone Mapping Spectrometer (SBUV/TOMS) launched on Nimbus 7 in 1978. NOAA's improved version (SBUV/2) is to fly until sometime in the 1990s and NASA plans to fly an SBUV/2 on the Upper Atmosphere Research Satellite in 1989. Differences between these instruments and in the algorithms for deriving ozone amounts from these data sets are discussed.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Format: text
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  • 3
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    Evaluation of a Quartz Bourdon Pressure Gage of Wind Tunnel Mach Number Control System Application (1986)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A theoretical and experimental study was undertaken to determine the feasibility of using the National Transonic Facility's high accuracy Mach number measurement system as part of a closed loop Mach number control system. The theoretical and experimental procedures described are applicable to the engineering design of pressure control systems. The results show that the dynamic response characteristics of the NTF Mach number gage (a Ruska DDR-6000 quartz absolute pressure gage) coupled to a typical length of pressure tubing were only marginally acceptable within a limited range of the facility's total pressure envelope and could not be used in the Mach number control system.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-TM-88991 , NAS 1.15:88991
    Format: application/pdf
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  • 4
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    A new multipoint thin-film diagnostic technique for fluid dynamic studies (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A multielement hot-film sensor has been developed with closely-spaced elements (2.5 mm) in the streamwise direction. In addition to boundary-layer transition detection, the output of these sensors can reveal the locations of boundary-layer separation and reattachment by a 180 deg phase difference in the 0-200-Hz frequency bandwidth between sensor elements on each side of either the separation or reattachment point. This paper describes the features of multielement hot-film sensor arrays and discusses results from their application to a number of low-speed and transonic airfoil tests.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: SAE PAPER 881453
    Format: text
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  • 5
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    Special report, exit slit mirrors for the Ebert spectrometer (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The use of a very long straight entrance slit in an Ebert grating spectrometer with two plane mirrors at the shorter exit slit to increase the energy density is described. This system has been employed in a far ultraviolet rocket spectrometer to provide higher sensitivity than has been achieved previously. The imaging properties and required slit and mirror adjustments are presented. Experimental results are included.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-128549 , T72-19300
    Format: application/pdf
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  • 6
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    Two-dimensional area scanning with image dissectors. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: An image dissector system for direct two-dimensional area scanning has been fabricated and is briefly described. Examples of application to direct scanning and digitization of photographic images are given.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
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  • 7
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    Tilting-filter measurements in dayglow rocket photometry. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A rocket-borne photometer containing two tilting-filter channels for the measurement of the forbidden OI 6300-A and 5577-A emission lines in the day airglow is described. The results of one flight substantiate the employment of tilting filters to determine accurate corrections for background continuum and provide reliable height profiles of emission intensity down to approximately 90 km. Discussions on the calibration of the instrument and its baffling against sunlight are also presented.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Applied Optics; 11; Oct. 197
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  • 8
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    Rocket flight performance of a preprototype Apollo 17 UV spectrometer S-169 (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The design, construction, testing, calibration, flight performance and flight data of an Ebert ultraviolet spectrometer are described which is an accurate representation of the conceptual design of the Apollo 17 UV spectrometer. The instrument was flown in an Aerobee 350 rocket from Wallops Island, Va., at 7:10 p.m. EDT on June 10, 1971 to an altitude of 328 km with a solar elevation angle of about 11 deg.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-115469
    Format: application/pdf
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  • 9
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    Mariner 6 and 7 ultraviolet spectrometers (1971)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Mariner 6 and 7 UV spectrometers, describing technical details, operating characteristics and calibration of planetary coronagraph and Ebert- Fastie monochromator used for Martian atmosphere analysis
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: ; ADEMIE DES SCIENCES
    Format: text
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  • 10
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    Nonreciprocal reflection-beam isolators for far-infrared use (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Magnetoplasma reflection-beam isolators for submillimeter-wave use are discussed in theory and experiment. The basic device uses the Kerr transverse magnetooptic effect (plane of polarization of the EM wave in the plane of incidence, which is perpendicular to a dc magnetic field) in InSb near room temperature. When the semiconductor slab is covered with a thin dielectric layer acting as a matching transformer, improved performance is predicted and observed at 337 microns, and very efficient isolator performance is predicted for 118 microns. Physical arguments are presented to explain the nonreciprocal phenomenon and lead to better device design.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
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