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  • COMMUNICATIONS AND RADAR  (1)
  • INSTRUMENTATION AND PHOTOGRAPHY  (1)
  • 1
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    Improved solution of the lidar equation utilizing particle counter measurements (1986)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The extraction of particle backscattering from incoherent lidar measurements poses some problems. In the case of measurements of the stratospheric aerosol layer the solution of the lidar equation is based on two assumptions which are necessary to normalize the measured signal and to correct it with the two-way transmission of the laser pulse. Normalization and transmission are tackled by adding the information contained in aerosol particle counter measurements of the University of Wyoming to the ruby lidar measurements at Garmisch-Partenkirchen. Calculated backscattering from height levels above 25 km for the El Chichon period will be compared with lidar measurements and necessary corrections. The calculated backscatter-to-extinction ratios are compared to those, which were derived from a comparison of published extinction values to measured lidar backscattering at Garmisch. These ratios were used to calculate the Garmisch lidar returns. For the period 4 to 12 months after the El Chichon eruption a backscater-to-extinction ratio of 0.026 1/sr was applied with smaller values before and after that time.
    Keywords: COMMUNICATIONS AND RADAR
    Type: NASA. Langley Research Center 13th International Laser Radar Conference; 2 p
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Dustsonde and lidar measurements of stratospheric aerosols - A comparison (1974)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Comparison of lidar and in situ measurements of stratospheric aerosol profiles obtained by backscattered ruby laser light and by direct in situ sampling over Laramie, Wyoming, on two nights in mid-September 1972. The lidar backscattering and the particle number density profiles correlated well. Based on these initial comparative experiments, the ground-based lidar coupled with temperature soundings appears to be a possible method for determining the relative aerosol profile under given stratospheric loading conditions.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Applied Optics; 13; Oct. 197
    Format: text
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    NASA TECHNICAL REPORTS
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