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  • 1
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    Frequency standard test facility data acquisition and processing system (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The interim frequency standards test facility tests all frequency standards used in the DSN. It is also the central testing facility for testing all ultrastable hydrogen maser frequency standards. This proposed data acquisition/processing system was designed to support the IFSTF by acquiring and processing the large amounts of data generated there.
    Keywords: COMMUNICATIONS AND RADAR
    Type: Telecommun. and Data Acquisition; p 22-30
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Automated frequency standard stability data reduction (1980)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: A design using a medium sized computer, a fiber optic communication link, and a desk top computer to reduce data collected at a remote site for analysis of frequency standard tests is described. Data generated at the Interim Frequency Standards Test Facility is collected on magnetic tape, which is then transported to a Sigma 5 computer. An Allan variance (two sample variance) is then calculated. The Allan variance (sigma vs tau) is then written to a data file in the Sigma 5. A fiber optic communication link between the Sigma 5 and a desk top computer was designed to transmit data in the Sigma 5 file to the desk top computer. A program was written for the desk top computer that will automatically access the data file in the Sigma 5, process the data and provide a data plot.
    Keywords: COMPUTER OPERATIONS AND HARDWARE
    Type: The Telecommun. and Data Acquisition Rept.; p 38-40
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Nonlinear response of plates subjected to inplane and lateral pressure pulses. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The nonlinear response of a rectangular plate exposed to a far-field sonic boom disturbance is studied. The plate is subjected to both lateral and in-plane disturbances. The lateral disturbance is in the form of an N-shaped pressure pulse, and the in-plane disturbance is represented by a sinusoidal pulse. The equations of motion are reduced to a set of nonlinear coupled ordinary differential equations using Galerkin's method. These equations are solved numerically using Hamming's (1959) modified predictor-corrector integration method. The effects of in-plane boundary conditions and in-plane inertia are investigated. The nonlinear results, when compared to the linear theory, serve to delineate the realm of validity of the linear theory.
    Keywords: STRUCTURAL MECHANICS
    Type: Midwestern Mechanics Conference; Aug 13, 1973 - Aug 15, 1973; Pittsburgh, PA
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Linear and nonlinear response of a rectangular plate subjected to lateral and inplane sonic boom disturbances (1970)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Transient response of rectangular window pane exposed to sonic boom disturbance using linear and nonlinear theories
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-CR-66936 , REPT-7
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Transient response of a rectangular plate subjected to lateral and inplane pressure pulses (1971)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Rectangular plate under lateral and inplane pressure pulses, examining transient response with Mathieu equation
    Keywords: STRUCTURAL MECHANICS
    Type: MIDWESTERN MECHANICS CONFERENCE; Aug 16, 1971 - Aug 18, 1971; NOTRE DAME, IN
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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