S/N as function of Stгehl ratio for the entire master reference library. The black line along the x-axis indicates the mean Strehl ratio value of 0.78. Along the y-axis, the black line represents the mean S/N obtained with single RSDI-PCA on all SHARDDS objects. The blue segmented line is the Strehl ratio value of HD 206893, 0.84, and the yellow area marks ± 10% tolerance limits with respect to this value.