Fig. 18.
Comparison of GRAVITY fringe tracker injection stability between STRAP and NAOMI. Top: injection stability vs. effective seeing for wind speeds in the 3 m s−1–9 m s−1 range. Bottom: injection stability vs. wind speed for a better-than-median effective seeing. NAOMI obtains in 1.5″ seeing the same performance as STRAP in 0.5″ seeing. NAOMI does not exhibit performance loss when the wind speed is below 2 m s−1.
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