Abstract

A methodology is presented for generalizing two-wavelength single-material differential absorption lidar to multiple wavelengths for use in simultaneous multimaterial detection and discrimination. A key role in the analysis is played by the concentration path length (CL) product covariance matrix Λ_ĈL, which generalizes the CL variance. Detection statistics for a multiwavelength alarm system are computed using Λ_ĈL with a multivariate normal distribution for the estimated CL product values. Off-diagonal elements in Λ_ĈL are found to affect significantly the predicted performance of two-material detection systems.

© 1985 Optical Society of America

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