Experimental sources used to construct the spectroscopic network of ¹⁶OH hyperfine lines. Given are the frequency range of the validated transitions of each source, the number of actual (A) and validated (V) transitions, and selected uncertainty statistics. Avg. = average, unc. = uncertainty, and max. = maximum.

Source tag	Range/MHz	A/V	Avg. unc./MHz	Max. unc./MHz
75DeMa119	7.43–23838.93	11/11	2.50 × 10−2	5.23 × 10−2
75MeDy120	88.95–23826.62	17/17	5.88 × 10−3	1.00 × 10−2
73MeDy118	88.95–193.00	4/4	5.00 × 10−4	5.00 × 10−4
76MeMeMiDy122	1171.49–13441.42	11/11	1.82 × 10−3	5.00 × 10−3
06LeMeHuSa153	1612.23–1720.53	2/2	4.75 × 10−5	8.50 × 10−5
64Radford109	1612.23–1720.53	4/4	2.33 × 10−3	3.30 × 10−3
72MeDy117	1612.23–1720.53	4/4	1.25 × 10−4	2.00 × 10−4
79CoSaAuLe125	1612.23–66133.35	12/12	2.55 × 10−2	5.00 × 10−2
06HuLeSaYe152	1665.40–1667.36	2/2	8.00 × 10−6	1.20 × 10−5
59EhToSt108	1665.46–1667.34	2/2	6.50 × 10−2	1.00 × 10−1
68Goss111	1720.53–1720.53	1/1	3.00 × 10−3	3.00 × 10−3
68Radford113	4660.24–6049.08	7/7	6.56 × 10−3	1.10 × 10−2
70BaDiGoRa115	7749.91–7831.96	4/4	5.00 × 10−3	5.00 × 10−3
55DoSaTo107	7760.36–36994.43	12/12	6.31	35.75
77DeMaBaBr123	8534.86–70858.93	20/20	3.11 × 10−2	1.20 × 10−1
80SaVa128	13433.96–13442.13	4/4	2.64 × 10−2	5.35 × 10−2
99ThWuSpMe148	13434.00–13442.08	4/4	9.92 × 10−3	2.47 × 10−2
68PoBe112	13434.62–36994.43	8/8	1.15 × 10−1	4.78 × 10−1
96WuSpMeAn146	13434.64–13441.42	2/2	5.00 × 10−4	5.00 × 10−4
65PoLi110	13434.65–13441.41	2/2	2.00 × 10−2	2.00 × 10−2
53SaScDoTo106	23818.16–36994.43	4/4	3.01 × 10−1	5.99 × 10−1
81KoZoLe129	66094.85–70887.99	6/6	3.33 × 10−2	5.00 × 10−2
93VaEv_C142	1834735.02–4602881.87	35/35	7.90 × 10−2	1.56 × 10−1
13Drouin156	1834735.06–2603427.29	17/17	5.34 × 10−1	2.37
86BlFaPi134	1834735.51–3036645.05	17/17	9.37 × 10−1	2.47
86BrZiJeEv135	1837816.39–3789214.99	22/22	7.79 × 10−1	4.74
93VaEv142	1837816.39–4209632.49	13/13	1.20 × 10−1	4.00 × 10−1
85FaBlPi132	2509935.44–2509988.61	3/3	8.04 × 10−1	8.08 × 10−1