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  • INSTRUMENTATION AND PHOTOGRAPHY  (30)
  • SPACE RADIATION  (29)
  • 1980-1984  (59)
  • 1
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    Plans for a fast image recording system at ESO (1984)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: A 256 diode-array will be installed as detector on the ESO OPTRONICS S-3000 measuring machine in order to increase the acquisition rate. A high intensity LED will be used as light source in a pulse mode. The data will be stored on a random access mass storage device as density values for later education. The scanning time for a 30 cm x 30 cm plate with a step size of 10 micron will be less than 10 hours while the dynamic range of the data is expected to be 2.5 density units with an offset of at least 1 unit.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Goddard Space Flight Center Astron. Microdensitometry Conf.; p 317-328
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Trapped-proton energy spectrum determination (M0002-1) (1984)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: The objective of this experiment is to measure the flux and energy spectrum of protons with energies of 1 to MeV. These protons are trapped on the Earth's magnetic field lines as part of the inner radiation belt, or Van Allen zone. The proton will be encountered predominantly in the South Atlantic anomaly at a 90 deg pitch angle.
    Keywords: SPACE RADIATION
    Type: NASA. Langley Research Center Long Duration Exposure Facility (LDEF); p 109-112
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    NASA TECHNICAL REPORTS
  • 3
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    Performance of the ESO PDS (1984)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: The astrometric and photometric performance of the PDS 1010A microdensitometer are discussed, including the tests used for checking it. The instrument was shown to satisfy operational requirements for photometric measurements of astronomical plates with respect to dynamic range and stability.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Goddard Space Flight Center Astron. Microdensitometry Conf.; p 89-95
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    NASA TECHNICAL REPORTS
  • 4
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    Halogen Occultation Experiment (HALOE) (1980)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA, Washington Upper Atmosphere Res. Program; p 236-237
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    The diffuse X-ray background spectrum from 3 to 50 keV (1980)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: The spectrum of the extragalactic diffuse X-ray background has been measured with the GSFC Cosmic X-ray Experiment on HEAO 1 for regions of the sky away from known point sources and more than 20 deg from the galactic plane. A total exposure of 80 sq m-s-sr is available at present. Free-free emission from an optically thin plasma of 40 plus or minus 5 keV provides an excellent description of the observed spectrum from 3 to 50 keV. This spectral shape is confirmed by measurements from five separate layers of three independent detectors. With an estimated absolute precision of about 10%, the intensity of the emission at 10keV is 3.2 keV/keV/sq cm/s/sr, a value consistent with the average of previously reported spectra. A uniform hot intergalactic medium of approximately 36% of the closure density of the universe would produce such a flux, although nonuniform models indicating less total matter are probably more realistic.
    Keywords: SPACE RADIATION
    Type: Astrophysical Journal; vol. 235
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    An analytic technique for statistically modeling random atomic clock errors in estimation (1981)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Minimum variance estimation requires that the statistics of random observation errors be modeled properly. If measurements are derived through the use of atomic frequency standards, then one source of error affecting the observable is random fluctuation in frequency. This is the case, for example, with range and integrated Doppler measurements from satellites of the Global Positioning and baseline determination for geodynamic applications. An analytic method is presented which approximates the statistics of this random process. The procedure starts with a model of the Allan variance for a particular oscillator and develops the statistics of range and integrated Doppler measurements. A series of five first order Markov processes is used to approximate the power spectral density obtained from the Allan variance.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Goddard Space Flight Center Proc. of the 12th Ann. Precise Time and Time Interval Appl. and Planning Meeting; p 551-580
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  • 7
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    Research pressure instrumentation for NASA Space Shuttle main engine, modification no. 5 (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The purpose of Modification No. 5 of this contract is to expand the scope of work (Task C) of this research study effort to develop pressure instrumentation for the SSME. The objective of this contract (Task C) is to direct Honeywell's Solid State Electronics Division's (SSED) extensive experience and expertise in solid state sensor technology to develop prototype pressure transducers which are targeted to meet the SSME performance design goals and to fabricate, test and deliver a total of 10 prototype units. SSED's basic approach is to effectively utilize the many advantages of silicon piezoresistive strain sensing technology to achieve the objectives of advanced state-of-the-art pressure sensors in terms of reliability, accuracy and ease of manufacture. More specifically, integration of multiple functions on a single chip is the key attribute of this technology which will be exploited during this research study.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-173860 , NAS 1.26:173860 , MPR-10
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  • 8
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    Research pressure instrumentation for NASA Space Shuttle main engine, modification no. 5 (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Research concerning the development of pressure instrumentation for the space shuttle main engine is reported. The following specific topics were addressed: (1) transducer design and materials, (2) silicon piezoresistor characterization at cryogenic temperatures, (3) chip mounting characterization, and (4) frequency response optimization.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-171122 , NAS 1.26:171122 , MPR-8
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  • 9
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    Research pressure instrumentation for NASA Space Shuttle main engine, modification no. 6 (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Research concerning the utilization of silicon piezoresistive strain sensing technology for space shuttle main engine applications is reported. The following specific topics were addressed: (1) transducer design and materials, (2) silicon piezoresistor characterization at cryogenic temperatures, (3) chip mounting characterization, and (4) frequency response optimization.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-171126 , NAS 1.26:171126 , MPR-6
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  • 10
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    Research pressure instrumentation for NASA Space Shuttle main engine, modification no. 5 (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The advantages of silicon piezoresistive strain sensing technology are being used to achieve the objectives of state of the art pressure sensors for SSME applications. The integration of multiple functions on a single chip is the key attribute being exploited. Progress is reported in transducer packaging and materials; silicon resistor characterization at cryogenic temperatures; chip mounting; and frequency response optimization.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-171125 , NAS 1.26:171125 , MPR-7
    Format: application/pdf
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