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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 20 — Jul. 10, 2009
  • pp: 3903–3914

Simultaneous analog and photon counting detection for Raman lidar

Rob K. Newsom, David D. Turner, Bernd Mielke, Marian Clayton, Richard Ferrare, and Chitra Sivaraman  »View Author Affiliations


Applied Optics, Vol. 48, Issue 20, pp. 3903-3914 (2009)
http://dx.doi.org/10.1364/AO.48.003903


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Abstract

The Atmospheric Radiation Measurement program Raman lidar was upgraded in 2004 with a new data system that provides simultaneous measurements of both the photomultiplier analog output voltage and photon counts. We describe recent improvements to the algorithm used to merge these two signals into a single signal with improved dynamic range. The effect of modifications to the algorithm are evaluated by comparing profiles of water vapor mixing ratio from the lidar with radiosonde measurements over a six month period. The modifications that were implemented resulted in a reduction of the mean bias in the daytime water vapor mixing ratio from a 3% dry bias to well within 1%. This improvement was obtained by ignoring the temporal variation of the glue coefficients and using only the nighttime average glue coefficients throughout the entire diurnal cycle.

© 2009 Optical Society of America

OCIS Codes
(010.3640) Atmospheric and oceanic optics : Lidar
(010.7340) Atmospheric and oceanic optics : Water
(040.5250) Detectors : Photomultipliers
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(280.3640) Remote sensing and sensors : Lidar
(290.5860) Scattering : Scattering, Raman

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: October 30, 2008
Revised Manuscript: April 29, 2009
Manuscript Accepted: May 20, 2009
Published: July 1, 2009

Citation
Rob K. Newsom, David D. Turner, Bernd Mielke, Marian Clayton, Richard Ferrare, and Chitra Sivaraman, "Simultaneous analog and photon counting detection for Raman lidar," Appl. Opt. 48, 3903-3914 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-20-3903

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