Fig. 2
From: The W2024 database of the water isotopologue \({{\rm{H}}}_{2}^{\,16}{\rm{O}}\)
Distribution of the most frequent quality sequences, covering 90 % of the HITRAN 2020-\({{\rm{H}}}_{2}^{\,16}{\rm{O}}\) lines. The color codes applied for the quality sequences are shown on the left-hand side of this figure, where slices formed by empirical, computed, or mixed (empirical plus computed) HITRAN 2020 transitions are clearly distinguished. The blue arrow indicates the direction whereby the slices follow the ordering utilized in the color legend. To highlight its most important characteristics, each slice is supplied with short stamps, displayed on the pie charts (notice that there are stamps shared between two slices). The relative fractions of the individual slices, with respect to the complete HITRAN 2020-\({{\rm{H}}}_{2}^{\,16}{\rm{O}}\) database, are included in colored boxes. Those lines which could not be matched with the (C)W2024 line list appear in the gray slice. The remaining transitions, whose quality sequences differ from those exhibited in the color legend, are collected in the cyan slice. For improved transparency, slices with less than 10 000 lines are enlarged in an inset.
