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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 23 — Aug. 10, 2011
  • pp: 4622–4632

Lamp mapping technique for independent determination of the water vapor mixing ratio calibration factor for a Raman lidar system

Demetrius D. Venable, David N. Whiteman, Monique N. Calhoun, Afusat O. Dirisu, Rasheen M. Connell, and Eduardo Landulfo  »View Author Affiliations


Applied Optics, Vol. 50, Issue 23, pp. 4622-4632 (2011)
http://dx.doi.org/10.1364/AO.50.004622


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Abstract

We have investigated a technique that allows for the independent determination of the water vapor mixing ratio calibration factor for a Raman lidar system. This technique utilizes a procedure whereby a light source of known spectral characteristics is scanned across the aperture of the lidar system’s telescope and the overall optical efficiency of the system is determined. Direct analysis of the temperature-dependent differential scattering cross sections for vibration and vibration-rotation transitions (convolved with narrowband filters) along with the measured efficiency of the system, leads to a theoretical determination of the water vapor mixing ratio calibration factor. A calibration factor was also obtained experimentally from lidar measurements and radiosonde data. A comparison of the theoretical and experimentally determined values agrees within 5%. We report on the sensitivity of the water vapor mixing ratio calibration factor to uncertainties in parameters that characterize the narrowband transmission filters, the temperature-dependent differential scattering cross section, and the variability of the system efficiency ratios as the lamp is scanned across the aperture of the telescope used in the Howard University Raman Lidar system.

© 2011 Optical Society of America

OCIS Codes
(010.1280) Atmospheric and oceanic optics : Atmospheric composition
(280.3640) Remote sensing and sensors : Lidar

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: December 15, 2010
Manuscript Accepted: March 21, 2011
Published: August 5, 2011

Citation
Demetrius D. Venable, David N. Whiteman, Monique N. Calhoun, Afusat O. Dirisu, Rasheen M. Connell, and Eduardo Landulfo, "Lamp mapping technique for independent determination of the water vapor mixing ratio calibration factor for a Raman lidar system," Appl. Opt. 50, 4622-4632 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-23-4622

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