Next: Developments Up: Optimal Combination of Sub-Stepped Previous: Optimal Combination . Fig. 1 shows the results of a simulation of sub-stepping and . ... Fig. 1 shows the four sub-stepped spectra, the ``merged'' result (as produced by calhrs ), and the optimally combined spectrum without regularization (i.e., =0). ... sub-stepped GHRS data (dotted line) against the observed data, i.e., as presented by the merged spectrum from calhrs (histogram). ...