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Table 1

CPU time requirements for the SEM approach proposed in this paper and the perturbation method of Nagendra et al. (2002) for different values of optical thickness T.

Optical SEM approach Perturbation method
thickness T (CPU time in min) (CPU time in min)

1 10 36
10 95 275
100 110 413
103 101 448
104 112 532

Notes. The PRD function computation times are excluded from the CPU time given in this table, because they are common to both the methods. The model parameters and the grid specifications are the same as those discussed in Sect. 6.1. The computations were performed on a Sun Fire V20z Server, 2385 MHz, with a single-core AMD Opteron processor.

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