\\ Species Tag:        &   18003 & Name:&  H2O           
\\ Version:            &       6 & & Water
\\ Date:       &  Nov. 2005      & &
\\ Contributor:&  B. J. Drouin   & &
\\             &  J. C. Pearson  & &
\\             &  H. M. Pickett  & &
\\ Lines Listed:       &    3086 & Q(300.0)=&      178.120
\\ Freq. (GHz) $<$     &   29799 & Q(225.0)=&      116.019
\\ Max. J:             &      23 & Q(150.0)=&       63.677
\\ LOGSTR0=            &  -999.0 & Q(75.00)=&       23.170
\\ LOGSTR1=            &  -999.0 & Q(37.50)=&        8.580
\\ Isotope Corr.:      &     0.0 & Q(18.75)=&        3.033
\\ Egy. (cm$^{-1}$) $>$&     0.0 & Q(9.375)=&        1.257
\\ $\mu_a$ = &                   & A=& 835840.3
\\ $\mu_b$ = & 1.8546            & B=& 435351.7
\\ $\mu_c$ = &                   & C=& 278138.7
\headend 

The frequency analysis includes the ground state and first four excited
vibrations and is based on H.M. Pickett, J.C. Pearson, C.E. Miller, 
2005, Journal of Molecular Spectroscopy {\bf 233}, 174-179.
The data set used in this fit includes all the microwave measurements
reviewed in J. C. Pearson, T. Anderson, E. Herbst, F. C. De Lucia and 
P. Helminger, 1991, Astrophys J. {\bf 379}, L41, additional measurements 
were used from J. C. Pearson, 1995, Ph.D. Thesis Duke University, S. 
Belov, 1996, Private Communication, F. Matsushima, H. Odashima, 
T. Iwasaki, S. Tsunekawa, K. Takagi, 1995, J. Mol.\ Struct.\ {\bf 352}, 353-371,
and P. Chen, J.C. Pearson, S. Matsuura, H.M. Pickett, G.A. Blake, 2000, 
Astrophys. J. Suppl. {\bf 128}, 371-385, K.V. Chance, K. Park, K.M. Evenson, 
1998, J. Quant. Spectrosc.Radiat. Transfer {\bf 59} 687-688.  FTIR rotational 
data was taken from J. Kauppinen, T. Karkkainen and E. Kyro, 1978, J. Mol.\ Spectrosc.\ {\bf 71}, 
15, J. W. C. Johns, 1985, J. Opt.\ Soc.\ Am.\ {\bf B2}, 1340, R. Paso and V. M.
Horneman, 1995, J. Opt.\ Soc.\ Am.\ {\bf B12}, 1813 and R.A. Toth, 1999, J. 
Mol. Spectros. {\bf 194} 28-42.

FTIR band transitions were taken from R.A. Toth, 1999, J. 
Mol. Spectros. {\bf 194} 28-42, P. De Natale, L. Lorini, M. Inguscio, I.G. Nolt, J.H. Park, G.DiLonardo, 
L. Fusina, P.R.A. Ade, A.G. Murray, 1997, Appl. Opt. {\bf 36}, 8526-8532. D.B. 
Peterson, C.I. Frum, H.M. Pickett (JPL data at 1000 K, 190-340 cm$^{-1}$), 
unpublished. M.P. Esplin, R.B. Wattson, M.L. Hoke, L.S. Rothman, 1998, J. 
Quant.Spectrosc. Radiat. Transfer {\bf 60}, 711-738. S.N. Mikhailenko, V.G. 
Tyuterev, K.A. Keppler, B.P. Winnewisser,M. Winnewisser, G. Mellau, S. Klee, 
K.N. Rao, 1997, J. Mol.Spectrosc. {\bf 184}, 330-349. O.L. Polyansky, J.R. 
Busler, B. Guo, K. Zhang, P.F. Bernath, 1996, J.Mol. Spectrosc. {\bf 176}, 
305-315. O.L. Polyansky, J. Tennyson, P.F. Bernath, 1997, J. Mol. Spectrosc. 
{\bf 186}, 213-221. O.L. Polyansky, N.F. Zobov, J. Tennyson, J.A. Lotoski, 
P.F. Bernath, 1997, J. Mol. Spectrosc. {\bf 184} 35-50.R.A. Toth, 1993, J. 
Opt. Soc. Am. B {\bf 10}, 1526-1544. R.A. Toth, L.R. Brown, C. Plymate, 1998, 
J. Quant. Spectrosc. Radiat.Transfer {\bf 59}, 529-562. N.F. Zobov, O.L. 
Polyansky, J. Tennyson, J.A. Lotoski, P.Colarusso, K.-Q. Zhang, P.F. Bernath, 
1999, J. Mol. Spectrosc. {\bf 193}, 118-136. Energy Levels are taken from R. A. Toth, 1998, 
J. Mol.\ Spectrosc.\ {\bf 190}, 379 and O. L. Polyansky, N. Zobov, S. Viti, 
J. Tennyson, P. Bernath and L. Wallace, 1997, J. Mol.\ Spectrosc.\ {\bf 186}, 
422.

The fit results in a reduced RMS of 9.5 obtained for a combination of the the five states.
This catalog entry represents the ground state portion only.

The intensities calculation follows the method in C. Camy-Peyret 
{\it et al.}, 1985, J. Mol.\ Spectrosc.\ {\bf 113}, 208.  A value of 
1.8546 Debye was used as well as second order Herman Wallis terms.  
The Herman Wallis terms were determined using SPCAT to match an intensity
prediction based on a fully perturbed ground state as described by H. M. Pickett, 
\lq\lq Centrifugal Corrections to Rotational Intensities", Lecture TF10, 45$^{th}$ 
Symposium on Molecular Spectroscopy, Columbus, OH, 1990.
This agrees well with observed IR intensities  
throughout the FIR (0.7\% absolute, 5.5\% relative, L.R. Brown, C. Plymate, 1996, 
Journal of Quantitative Spectroscopy 56, 263) and
IR (1.8\% absolute, 14.1\% relative, R.A. Toth, 1998, J. Mol. Spectrosc. {bf 190}, 379-396).
Stark shifts predicted from this dipole agree within experimental error with S. A. Clough,
Y. Beers, G. P. Klein, L.S. Rothman, 1973, J. Chem. Phys. {\bf 59}, 2254-2259 as well as T. R. 
Dyke and J. S. Muenter, (1973), J. Chem. Phys, {\bf 59}, 3125-3127.
The partition function includes the $\nu_2$, $2\nu_2$, $\nu_1$ and $\nu_3$ states.  
Classical corrections for higher temperatures are given in P. Chen {\it et al.}.