Abstract
We derive surface-integral expressions for the Q matrices in spheroidal coordinates that allow us to compute the T matrix in spheroidal coordinates. This approach combines the advantages of the null-field method (also referred to as the extended boundary condition method) with those of the separation of variables method. For spheroidal particles we obtain explicit Q matrix expressions that display the expected symmetry properties and yield correct results in the spherical limit. Compared to surface-integral expressions for spheroids in spherical coordinates, our results are considerably simpler because the integrands do not contain radial functions.
Original language | English |
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Pages (from-to) | 61-78 |
Number of pages | 18 |
Journal | Journal of Quantitative Spectroscopy and Radiative Transfer |
Volume | 77 |
Issue number | 1 |
DOIs | |
State | Published - 15 Feb 2003 |