Histogram showing number of frames per DIT of master reference library (orange) and reference library created using the correlation method with N = 50 and R = 10 (blue). This reference library contains 601 frames, with 50.3% having a DIT of 4s, 28.7% having a DIT of 16s, and 15.8% having a DIT of 8s. Despite the science target’s DIT being 4s, the reference library was created with a broader range of DITs.