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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 43, Iss. 4 — Feb. 1, 2004
  • pp: 977–989

Aerosol lidar intercomparison in the framework of the EARLINET project. 2. Aerosol backscatter algorithms

Christine Böckmann, Ulla Wandinger, Albert Ansmann, Jens Bösenberg, Vassilis Amiridis, Antonella Boselli, Arnaud Delaval, Ferdinando De Tomasi, Max Frioud, Ivan Videnov Grigorov, Arne Hågård, Matej Horvat, Marco Iarlori, Leonce Komguem, Stephan Kreipl, Gilles Larchevêque, Volker Matthias, Alexandros Papayannis, Gelsomina Pappalardo, Francesc Rocadenbosch, José António Rodrigues, Johannes Schneider, Valery Shcherbakov, and Matthias Wiegner  »View Author Affiliations


Applied Optics, Vol. 43, Issue 4, pp. 977-989 (2004)
http://dx.doi.org/10.1364/AO.43.000977


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Abstract

An intercomparison of aerosol backscatter lidar algorithms was performed in 2001 within the framework of the European Aerosol Research Lidar Network to Establish an Aerosol Climatology (EARLINET). The objective of this research was to test the correctness of the algorithms and the influence of the lidar ratio used by the various lidar teams involved in the EARLINET for calculation of backscatter-coefficient profiles from the lidar signals. The exercise consisted of processing synthetic lidar signals of various degrees of difficulty. One of these profiles contained height-dependent lidar ratios to test the vertical influence of those profiles on the various retrieval algorithms. Furthermore, a realistic incomplete overlap of laser beam and receiver field of view was introduced to remind the teams to take great care in the nearest range to the lidar. The intercomparison was performed in three stages with increasing knowledge on the input parameters. First, only the lidar signals were distributed; this is the most realistic stage. Afterward the lidar ratio profiles and the reference values at calibration height were provided. The unknown height-dependent lidar ratio had the largest influence on the retrieval, whereas the unknown reference value was of minor importance. These results show the necessity of making additional independent measurements, which can provide us with a suitable approximation of the lidar ratio. The final stage proves in general, that the data evaluation schemes of the different groups of lidar systems work well.

© 2004 Optical Society of America

OCIS Codes
(010.3640) Atmospheric and oceanic optics : Lidar
(010.7030) Atmospheric and oceanic optics : Troposphere
(280.1100) Remote sensing and sensors : Aerosol detection
(280.3640) Remote sensing and sensors : Lidar
(290.1350) Scattering : Backscattering
(290.2200) Scattering : Extinction

History
Original Manuscript: March 19, 2003
Revised Manuscript: October 1, 2003
Published: February 1, 2004

Citation
Christine Böckmann, Ulla Wandinger, Albert Ansmann, Jens Bösenberg, Vassilis Amiridis, Antonella Boselli, Arnaud Delaval, Ferdinando De Tomasi, Max Frioud, Ivan Videnov Grigorov, Arne Hågård, Matej Horvat, Marco Iarlori, Leonce Komguem, Stephan Kreipl, Gilles Larchevêque, Volker Matthias, Alexandros Papayannis, Gelsomina Pappalardo, Francesc Rocadenbosch, José António Rodrigues, Johannes Schneider, Valery Shcherbakov, and Matthias Wiegner, "Aerosol lidar intercomparison in the framework of the EARLINET project. 2. Aerosol backscatter algorithms," Appl. Opt. 43, 977-989 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-4-977

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