%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%% %%% READ.ME: program hom_c (version 4.3q2a) %%% -------- %%% %%% Light Scattering by Spheroidal Particles %%% ======================================== %%% %%% Calculations of extinction, scattering and absorption %%% efficiency factors for prolate or oblate homogeneous spheroids. %%% %%% %%% Parameters: %%% ----------- %%% %%% nterms: number of terms in Eqs. for efficiency factors, %%% nalphas: number of angles for incident radiation. %%% %%% The values of parameters may be changed in file h4_3q2a.for. %%% %%% %%% Restrictions: %%% ------------- %%% %%% nterms: %%% c2 = ri*(2*pi/wvl)*(d/2) <= 135 (?) for prolate spheroids, %%% <= 100 (?) for oblate spheroids, %%% (d - focus distance of spheroid), %%% %%% nterms ~= 1.2 * cdabs(c2) + 8 (+ ~30 if ksi0 > 2). %%% %%% nalphas: <= 91 %%% %%% %%% Recommended values: %%% ------------------- %%% %%% refractive index: k <= 1/2*n, (?) %%% eps: 1d-15 for prolate spheroids, %%% 1d-15 for oblate spheroids, %%% eps1: 1d-3 - 1d-6 %%% %%% %%% Publications: %%% ------------- %%% %%% Voshchinnikov N.V., Farafonov V.G. %%% Optical properties of spheroidal particles, %%% Astrophys. Space Sci. 1993. V. 204. P. 19-86. %%% %%% Voshchinnikov N.V. %%% Electromagnetic scattering by homogeneous and coated spheroids: %%% calculations using the separation of variables method, %%% J. Quant. Spectrosc. Radiat. Transfer 1996. V. 55. P. 627-636. %%% %%% Farafonov V.G., Voshchinnikov N.V., Somsikov V.V. %%% Light scattering by a core-mantle spheroidal particle, %%% Applied Optics 1996. V. 35. P. 5412-5426. %%% %%% %%% Questions, more information, new versions: %%% ------------------------------------------- %%% %%% Dr. Nikolai Voshchinnikov %%% Astronomical Institute %%% St. Petersburg University %%% St. Petersburg-Peterhof %%% 198904 Russia %%% e-mail: nvv@aispbu.spb.su %%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%% %%% The development of the new approach and the code was financially %%% supported by a grant of the Volkswagen Foundation (Germany). %%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%