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  • ELECTRONICS AND ELECTRICAL ENGINEERING  (1)
  • SOLAR PHYSICS  (1)
  • SPACECRAFT INSTRUMENTATION  (1)
  • 1
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    A timed-correlated four-link Doppler Tracking system (1978)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Phase perturbations that occur in the following components of the one and two-way systems are considered: (1) one-way system (signal from A to B): station a oscillator - transmitter A antenna A - signal path - antenna B - receiver B station B oscillator - recording system B; (2) two-way system (signal from A to B back to A): station A oscillator - transmitter A - antenna A - signal path up - antenna B - transponder B - antenna B - signal path down - receiver A - station A oscillator - recording system A. A symmetrical one- and two-way system which can identify the place of origin of the fluctuation and quantify it so as to recover the unperturbed phase at a given moment of time by time-correlating the phase fluctuations obtained in the one- and two-way data taken at both stations is described
    Keywords: SOLAR PHYSICS
    Type: JPL A Close-up of the Sun; p 457-497
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Test of relativistic gravitation with a space-borne hydrogen maser (1980)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The results of a test of general relativity with use of a hydrogen-maser frequency standard in a spacecraft launched nearly vertically upward to 10,000 km are reported. The agreement of the observed relativistic frequency shift with prediction is at the 70 x 10 to the -6th level.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: Physical Review Letters; 45; Dec. 29
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Application of modern time series analysis to high stability oscillators (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Techniques of modern time series analysis useful for investigating the characteristics of high-stability oscillators and identifying systematic perturbations are discussed with reference to an experiment in which the frequencies of superconducting cavity-stabilized oscillators and hydrogen masers were compared. The techniques examined include transformation to stationarity, autocorrelation and cross-correlation, superresolution, and transfer function determination.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Type: Annual Frequency Control Symposium; May 28, 1980 - May 30, 1980; Philadelphia, PA
    Format: text
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    NASA TECHNICAL REPORTS
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