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  • Life and Medical Sciences
  • MASERS
  • ddc:330
  • 2020-2022  (26)
  • 2010-2014  (272)
  • 1970-1974  (1,654)
  • 1965-1969  (1,350)
Collection
Keywords
Publisher
Language
Years
Year
  • 1
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    The Apollo 11 laser ranging retro-reflector array (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The laser ranging retro-reflector now deployed at Tranquility Base consists of an array assembly housing 100 fused-silica retro-reflectors mounted on a pallet-aiming assembly resting on the lunar surface. The array assembly serves to hold, optically align, and thermally isolate the retro-reflectors to preserve optimum optical performance at all operating temperatures in the expected range from -300 to 250 F.
    Keywords: MASERS
    Type: NASA. Goddard Space Flight Center 5th Aerospace Mech. Symp.; p 171-175
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Enhancement of laser output by nuclear reactions (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Enhancement output power of CO-2 laser excited by electric discharge and irradiated by neutrons obtained from nuclear reactor
    Keywords: MASERS
    Type: RES. ON URANIUM PLASMAS AND THEIR TECHNOL. APPL. 1971; P 397-400
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Clear-air-turbulence detection using lasers (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Detecting clear air turbulence using CO2 laser Doppler system
    Keywords: MASERS
    Type: NASA AIRCRAFT SAFETY AND OPERATING PROBL., VOL. 1 1971; P 89-100
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Frequency generation and control - Atomic hydrogen maser frequency standard (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Frequency stability of automatic hydrogen maser cavity tuner
    Keywords: MASERS
    Type: THE DEEP SPACE NETWORK, VOL. 1 15 FEB. 1971; P 73-75
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Measurement of the power spectral density of phase of the hydrogen maser (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Hydrogen masers are being developed for the Deep Space Network as improved frequency standards, in order to achieve better timing accuracies, reduced Doppler residuals, and lower phase noise in the tracking system. Performance data for the masers are given in two forms: time domain performance, useful for analyzing time keeping systems and Doppler systems; and frequency domain performance, useful for analyzing tracking systems. Particular attention is given to frequency domain performance, as obtained from both time domain measurements and direct measurements.
    Keywords: MASERS
    Type: JPL Quart. Tech. Rev., Vol. 1, No. 4; p 30-33
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    The lunar laser ranging experiment (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: With data from two or more well-located observing stations, the lunar range can be corrected accurately for the effects of polar motion and fluctuations in the earth's rotation rate. Very accurate corrections can be made for the earth tides at each station. It appears that the use of lasers giving roughly 0.1-msec pulse lengths is highly desirable. With them, single-shot ranging accuracies of about 3 cm are expected. The actual lunar range results will be analyzed by fitting a numerical integration for the lunar motion to the data. A mathematical model for lunar range is given. Tests of the theory of gravitation are considered.
    Keywords: MASERS
    Type: JPL Proc. of the Conf. on Exptl. Tests of Gravitation Theories; p 178-181
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    The accuracy of laser tracking (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: A brief discussion of the actual laser tracking performance of geodetic satellites is followed by a discussion of the errors inherent in the laser system. An estimate is made of the capability expected within the next few years for the tracking of a heliocentric probe. The GEOS 1, GRARR, and GEOS 2 systems are considered. Errors in the tracking of a heliocentric probe are noted. These include errors due to the earth's atmosphere, (beam bending, atmospheric absorption, atmospheric turbulence, and atmospheric distortion of short laser pulses), and errors due to coronal effects.
    Keywords: MASERS
    Type: JPL Proc. of the Conf. on Exptl. Tests of Gravitation Theories; p 182-189
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Experiment M406, optical communications (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: An optical communications system, consisting of a gallium arsenide laser transmitter and three instrumented ground sites, was evaluated during the Gemini 7 flight. Considered was the use of crewmembers as a pointing element and the exploration of the atmosphere by optical coherent radiator outside the atmosphere. Results show that beacon lasers of greater survivability in field environments are needed to overcome unfavorable cloud conditions. A 1-watt argon laser is visible at orbital altitudes.
    Keywords: MASERS
    Type: The Gemini Program: Phys. Sci. Expt. Sum.; p 509-512
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  • 9
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    Optical systems and station procedures for the Surveyor 7 laser pointing test (1969)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Optical systems and alignment procedures for earth-based stations during Surveyor 7 laser pointing tests
    Keywords: MASERS
    Type: ANALYSIS OF SURVEYOR DATA 30 JUN. 1970; P 125-134
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Application of laser Doppler techniques to turbulent velocity measurement (1968)
    In:  CASI
    Details
    Publication Date: 2005-11-13
    Description: Laser Doppler instrumentation for turbulent velocity measurement
    Keywords: MASERS
    Type: MOL. RADIATION AND ITS APPL. TO DIAGNOSTIC TECH. 8 JAN. 1968 (SEE N68-18082 08-33) P 328-358
    Format: text
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    NASA TECHNICAL REPORTS
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