\\ Species Tag: & 19004 & Name:& H$_3$O$^+$ \\ Version: & 2 & & Hydronium ion, \\ Date: & Nov. 2008 & & GS, $\nu_2$ = 1 \\ Contributor:& S. Yu & & \\ & B. J. Drouin & & \\ Lines Listed: & 304 & Q(300.0)=& 520.1678 \\ Freq. (GHz) $<$ & 10000 & Q(225.0)=& 326.8681 \\ Max. J: & 20 & Q(150.0)=& 174.0742 \\ LOGSTR0= & -5.0 & Q(75.00)=& 62.5579 \\ LOGSTR1= & -5.0 & Q(37.50)=& 26.6647 \\ Isotope Corr.: & 0.0 & Q(18.75)=& 15.9161 \\ Egy. (cm$^{-1}$) $>$& 0.0 & Q(9.375)=& 11.6139 \\ $\mu_a$ = & & A=& 331411.77 \\ $\mu_b$ = & & B=& A \\ $\mu_c$ = & 1.438 & C=& 186836.77 \headend The two inversion states of the ground state, $\nu_1$ = 1, $\nu_2$ = 1, $\nu_3$ = 1, $\nu_4$ = 1 states are included in this calculation. The vibrational designations are as the following: 00 for $0^-$; 01 for $0^+$; 02 for $\nu_2^-$, 03 for $\nu_2^+$, 04 for $\nu_1^-$, 05 for $\nu_1^+$, 06 for $\nu_3^-$, $l$ = 1; 07 for $\nu_3^-$, $l$ = -1; 08 for $\nu_3^+$, $l$ = 1; 09 for $\nu_3^+$, $l$ = -1; 10 for $\nu_4^-$, $l$ = 1; 11 for $\nu_4^-$, $l$ = -1; 12 for $\nu_4^+$, $l$ = 1; 13 for $\nu_4^+$, $l$ = -1; The experimental measurements were reported by Plummer et al., 1985, J. Chem.\ Phys.\ {\bf 83}, 1428; Bogey et al., 1985, Astron.\ Astrophys.\ {\bf 148}, L11; Verhoeve et al., 1988, Chem.\ Phys.\ Lett., {\bf 143}, 501; Verhoeve et al., 1989, Chem. Phys. Lett., {\bf 161}, 195; Liu and Oka, 1985, Phys.\ Rev.\ Lett.\ {\bf 54}, 1787; Liu et al., 1985, J. Chem.\ Phys.\ {\bf 82}, 5368; Liu et al.,1986, J. Chem. Phys., {\bf 84}, 1312; Davies et al., 1985, J. Opt. Soc. Am. B, {\bf 2}, 794; Haese and Oka, 1984, J. Chem. Phys., {\bf 80 }, 572; Lemoine and Destombes, 1984, Chem. Phys. Lett., {\bf 111}, 284; Zheng et al., 2007, Chin. Phys. Lett., {\bf 24}, 2569; Tang and Oka, 1999, J. Mol. Spectrosc., {\bf 196}, 120; Stahn et al., 1987, Mol. Phys. {\bf 60}, 121; Ho al., 1991, J. Mol. Spectrosc., {\bf 149}, 530; Gruebele et al., 1987 J. Chem. Phys., {\bf 87}, 3347; Yu et al., 2008, Astrophys. J. Supp. (in press). The dipole moments for the inversion transitions, $\nu_1$ and $\nu_2$ were taken from the results from Botschwina et al. 1984, Chem.\ Phys.\ Lett.\ {\bf 102}, 299; the dipole moments for $\nu_3$ and $\nu_4$ are not available and were estimated based on the available infrared intensity ratios (Colvin et al. 1983, J.\ Chem.\ Phys.\ {\bf 79}, 1551 ) with the assumption that infrared intensities are proportional to the square of dipole moments.