title: Light scattering by a multilayered spheroidal                     particle.
abstract: The light scattering problem for a confocal multilayered spheroid has been solved                     by the extended boundary condition method with a corresponding spheroidal basis.                     The solution preserves the advantages of the approach applied previously to                     homogeneous and core-mantle spheroids, i.e., the separation of the radiation                     fields into two parts and a special choice of scalar potentials for each of the                     parts. The method is known to be useful in a wide range of the particle                     parameters. It is particularly efficient for strongly prolate and oblate                     spheroids. Numerical tests are described. Illustrative calculations have shown                     that the extinction factors converge to average values with a growing number of                     layers and how the extinction varies with a growth of particle porosity.
authors.affiliation: State University of Aerospace Instrumentation, St. Petersburg, Russia.
authors.forename: Victor G
authors.initials: VG
authors.lastname: Farafonov
authors.forename: Nikolai V
authors.initials: NV
authors.lastname: Voshchinnikov