Mathematical Inversion Algorithms for Optically-Thick Remote Sensing Applications.

摘要

Inversion techniques based on the radiative transfer equation are described for applications in which the scattering phenomena cannot be analyzed with a low-order multiple collision analysis. The applications examined include the characterization of the optical properties of the medium, specifically the angular scattering coefficients of the phase function, or the estimation of the albedo of a surface obscured by a multiple-scattering medium. Both passive and active sources are considered. Most of the work to date has involved the analytical development of inversion algorithms and their numerical testing using direct solutions of the radiative transfer equation under conditions with and without simulated random experimental fluctuations. In addition, the time-dependent inversion algorithm has been tested with experimental measurements of the backscattered radiance from a very thick homogenous target. Keywords: Remote sensing; Radiative transfer; Inverse problems; Optically thick atmospheres; Reprints. (jhd)