The net photon current is obtained from the exact transport solution for photon density in an infinite isotropic atmosphere. An analytical-numerical solution for the photon current is developed and presented graphically together with the diffusion theory current <i>versus</i> nondimensional distance.
JOHN F. BATTER, JR., "Transport Calculation of the Net Current of Photons in an Isotropically-Scattering Atmosphere," J. Opt. Soc. Am. 48, 371-373 (1958)