Physics
Scientific paper
May 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jqsrt..55..649h&link_type=abstract
Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 55, issue 5, pp. 649-661
Physics
23
Scattering: Radiative Transfer, Scattering: Numerical Methods
Scientific paper
Scattering matrices describe the transformation of the Stokes parameters of a beam of radiation upon scattering of that beam. The problems of testing scattering matrices for scattering by one particle and for single scattering by an assembly of particles are addressed. The treatment concerns arbitrary particles, orientations and scattering geometries. A synopsis of tests that appear to be the most useful ones from a practical point of view is presented. Special attention is given to matrices with uncertainties due, e.g., to experimental errors. In particular, it is shown how a matrix Emod can be constructed which is closest (in the sense of the Frobenius norm) to a given real 4×4 matrix E such that Emod is a proper scattering matrix of one particle or of an assembly of particles, respectively. Criteria for the rejection of E are also discussed. To illustrate the theoretical treatment a practical example is treated. Finally, it is shown that all results given for scattering matrices of one particle are applicable for all pure Mueller matrices, while all results for scattering matrices of assemblies of particles hold for sums of pure Mueller matrices.
Hovenier Joachim Willem
van der Mee Cornelis V. M.
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