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  • 1
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    A comparison between Lageos laser ranging and VLBI determined baselines (1984)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Two independent measurement techniques, Lageos satellite laser ranging (SLR), and very long baseline interferometry (VLBI) are compared in the measurement of distances (or baselines) between several locations in the continental U.S. The results of this analysis is summarized where both the SLR and VLBI baseline lengths and their differences (SLR minus VLBI) are presented. A comparison of the 22 baselines shows a mean difference of 1.0 + or - 1.1 cm with a scatter about zero of 5.2 cm. No apparent systematic scale difference between the networks is evident. A map of the baselines is included and indicates their differences, SLR minus VLBI, in centimeters.
    Keywords: LASERS AND MASERS
    Type: Res. Activities of the Geodyn. Branch; 4 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Time and frequency stability for the Crustal Dynamics Project (1981)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Very long base interferometry (VLBI) and laser ranging to artificial satellites and the Moon were used to determined vector baselines between stations with precisions of about one part in 10 to the 8th power. Deformations and strain accumulations in active earthquake regions were determined by making frequent measurements of baselines between many stations in active areas near plate boundaries.
    Keywords: LASERS AND MASERS
    Type: Proc. of the 12th Ann. Precise Time and Time Interval Appl. and Planning Meeting; p 649-662
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Multiple relaxation and inhomogeneous broadening in resonance enhanced Raman scattering - Application to tunable infrared generation (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: The solutions for the imaginary susceptibility of the Raman field transition with arbitrary relaxation rates and field strengths are examined for differing sets of relaxation rates with emphasis on alkali metal vapors which have spontaneous emission dominated relaxation. The model is further expanded to include Doppler broadening and used to predict the peak gain as a function of detuning for a frequency doubled alexandrite laser-pumped cesium vapor gain cell.
    Keywords: LASERS AND MASERS
    Type: Applied Physics B - Photophysics and Laser Chemistry (ISSN 0721-7269); 48; 173-182
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Instabilities in a three-level coherently pumped laser (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: A theory for a coherently pumped, homogeneously broadened laser is developed which predicts instability at excitations 1.6 times threshold. The system exhibits a period-doubling sequence, chaos, and a period-three window.
    Keywords: LASERS AND MASERS
    Type: Optics Communications (ISSN 0030-4018); 64; 54-58
    Format: text
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    NASA TECHNICAL REPORTS
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