The Code SAND-II

The code SAND-II assumes an estimate of the flux (pp j=i,G, and for subsequent iterations applies a nonlinear adjustment to the flux. For the A th iteration, 

To avoid spurious variations introduced to the result by the iteration, SAND-II applies smoothing to the weighting factors used for the calculation of the flux correction factor Experience has shown that SAND-II is better than either SPECTRA or RDMM. 

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