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Laboratory Studies

In addition to the measurement campaigns undertaken by the Raman lidar group, more experimental research is conducted from within the Raman lidar lab (see Figure 1 below) in the Earth Sciences Building at NASA/GSFC.


Raman Lidar Lab
Figure 1. Raman Lidar laboratory.
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Some of the recent measurements and systems used for these measurements are listed below:
  • Laboratory setup for the simultaneous measurement of aerosol and cloud physical properties using Raman lidar


  • Spectrally scanned lidar measurements of Raman scattering in the spectral regions of N2, liquid water and water vapor compared with model predictions of the Raman water vapor spectrum

    There were no clouds present during these measurements. The profiles have been summed above and below the boundary layer height of 1.2 km as shown. We continue to study the anomolous scattering in the liquid water band in the absence of clouds.

  • Spectrally scanned lidar measurements of Raman scattering from CO2 (both nu1 and 2nu2 transitions) and O2 including both the q-branch and rotational lines


    Also plotted are model simulations of the intensity of
    the O2 rotational lines. This study was performed to
    determine the magnitude of interference presented by
    rotational line scattering from O2 for a potential
    measurement of CO2 using the 2nu2 line.
    The conclusion is that with a 3A filter the magnitude
    of interference is approximately 0.1% of the anticipated
    CO2 signal.

 

 

 
Curator:
Martin Cadirola, Ecotronics Digital Media
NASA Official:
 Dr. David Whiteman, David.N.Whiteman@nasa.gov
Last Updated:
Friday, January 20, 2006
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