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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 30 — Oct. 20, 2008
  • pp: 5592–5603

Accuracy of Raman lidar water vapor calibration and its applicability to long-term measurements

Thierry Leblanc and I. Stuart McDermid  »View Author Affiliations


Applied Optics, Vol. 47, Issue 30, pp. 5592-5603 (2008)
http://dx.doi.org/10.1364/AO.47.005592


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Abstract

A Raman lidar calibration method adapted to the long-term monitoring of atmospheric water vapor is proposed. The accuracy of Raman lidar water vapor profiles is limited by that of the calibration process. Typically, calibration using in situ balloon-borne measurements suffers from the nonsimultaneity and noncollocation of the lidar and in situ measurements, while calibration from passive remote sensors suffers from the lower accuracy of the retrievals and incomplete sampling of the water vapor column observed by lidar. We propose a new hybrid calibration method using a combination of absolute calibration from radiosonde campaigns and routine-basis (off-campaign) partial calibration using a standard lamp. This new method takes advantage of the stability of traceable calibrated lamps as reliable sources of known spectral irradiance combined with the best available in situ measurements. An integrated approach is formulated, which can be used for the future long-term monitoring of water vapor by Raman lidars within the international Network for the Detection of Atmospheric Composition Change and other networks.

© 2008 Optical Society of America

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

ToC Category:
Remote Sensing and Sensors

History
Original Manuscript: March 18, 2008
Revised Manuscript: September 5, 2008
Manuscript Accepted: September 10, 2008
Published: October 13, 2008

Citation
Thierry Leblanc and I. Stuart McDermid, "Accuracy of Raman lidar water vapor calibration and its applicability to long-term measurements," Appl. Opt. 47, 5592-5603 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-30-5592

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