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Applied Optics

Applied Optics


  • Vol. 37, Iss. 30 — Oct. 20, 1998
  • pp: 7019–7034

Adaptive filter solution for processing lidar returns: optical parameter estimation

Francesc Rocadenbosch, Gregori Vázquez, and Adolfo Comerón  »View Author Affiliations

Applied Optics, Vol. 37, Issue 30, pp. 7019-7034 (1998)

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Joint estimation of extinction and backscatter simulated profiles from elastic-backscatter lidar return signals is tackled by means of an extended Kalman filter (EKF). First, we introduced the issue from a theoretical point of view by using both an EKF formulation and an appropriate atmospheric stochastic model; second, it is tested through extensive simulation and under simplified conditions; and, finally, a first real application is discussed. An atmospheric model including both temporal and spatial correlation features is introduced to describe approximate fluctuation statistics in the sought-after atmospheric optical parameters and hence to include a priori information in the algorithm. Provided that reasonable models are given for the filter, inversion errors are shown to depend strongly on the atmospheric condition (i.e., the visibility) and the signal-to-noise ratio along the exploration path in spite of modeling errors in the assumed statistical properties of the atmospheric optical parameters. This is of advantage in the performance of the Kalman filter because they are often the point of most concern in identification problems. In light of the adaptive behavior of the filter and the inversion results, the EKF approach promises a successful alternative to present-day nonmemory algorithms based on exponential-curve fitting or differential equation formulations such as Klett’s method.

© 1998 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(010.1290) Atmospheric and oceanic optics : Atmospheric optics
(010.3640) Atmospheric and oceanic optics : Lidar

Original Manuscript: September 29, 1997
Revised Manuscript: April 8, 1998
Published: October 20, 1998

Francesc Rocadenbosch, Gregori Vázquez, and Adolfo Comerón, "Adaptive filter solution for processing lidar returns: optical parameter estimation," Appl. Opt. 37, 7019-7034 (1998)

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