Median dT quality-fit criterion is plotted as a function of the median rms criterion for each skydip scan of the N2R9 campaign and for the three arrays. The skydips that yield a poor fit of the KID resonance frequencies, and hence do not met Median dT criterion, are also discarded using Median rms. The latter criterion further discards noisy skydips. Empty diamonds show the results of the first iteration of the skydip coefficient estimation, labelled “v1”, whereas filled circles show the second iteration, labelled “v2”, for which only the skydips that met both fit-quality criteria are included. After the second iteration, all the remaining skydips met the criteria.