Transition frequencies with hyperfine structure splitting were taken from
(1) P. M. Sheridan, S. K. McLamarrah, and L. M. Ziurys, 2003, J. Chem. Phys. 119, 9496.
The predictions should be sufficiently accurate for observational purposes. Some caution is advised for frequencies with calculated uncertainties exceeding 0.3 MHz.
The dipole moment was calculated by
(2) C. Koukounas, S. Kardahakis, and A. Mavridis, 2004, J. Chem. Phys. 120, 11500.