Seven very accurate low-N (≤ 2), low energy MW transition frequencies are from
(1) B. A. McGuire, M.-A. Martin-Drumel, K. L. K. Lee, J. F. Stanton, C. A. Gottlieb, and M. C. McCarthy 2018, Phys. Chem. Chem. Phys. 20, 13870.
Millimeter data were taken from
(2) S. Yamamoto, S. Saito, K. Kawaguchi, Y. Chikada, H. Suzuki, N. Kaifu, S.-I. Ishikawa, and M. Ohishi, 1990, Astrophys. J. 361, 318.
Transition frequencies with calculated uncertainties exceeding 0.1 MHz should be viewed with some caution. Please note that some HFS components have comparatively large uncertainties. Their positions should be viewed with caution.
The dipole moment is assumed to agree with that of the main isotopolog, see e056002.cat.