Fig. 2.

Changing the scan model from a full-cycle scan (a) to a half-scan (c) helps to find stable solutions for the deconvolution problem. If the RS signal completely decays before it reaches the inflection points of B(t), up- and down-scan contributions can be separated (b). B_up(t) and B_down(t) scans (c) are periodic, as well as B(t). The period is equal to P/2. In both models, the excitation field B₁ is CW.