Figure 4
SD plotted vs TS 1 and TS 2 for case of NS + 2 SR measurements without constraints on TS. The global minimum SD for an assumed known T1 = 1200 ms is achieved with a fixed TS = TS1 = TS2 = 910 ms (arrow A). Note there is a local minimum corresponding to TS1 = 1090, with very long TS2 (arrow B) which is effectively 1 SR measurement and 2 non-saturated anchor images.