\\ Species Tag: & 46008 & Name:& CH3OCH3
\\ Version: & 1 & & Dimethyl Ether
\\ Date: & Oct. 1992 & & ground state,
\\ Contributor:& H. M. Pickett & &AA, EE, EA, AE
\\ & & &
\\ Lines Listed: & 21735 & Q(300.0)=& 228016.
\\ Freq. (GHz) $<$ & 9999 & Q(225.0)=& 152698.
\\ Max. J: & 50 & Q(150.0)=& 84188.
\\ LOGSTR0= & -9.0 & Q(75.00)=& 29828.
\\ LOGSTR1= & -7.0 & Q(37.50)=& 10563.
\\ Isotope Corr.: & 0.0 & Q(18.75)=& 3748.
\\ Egy. (cm$^{-1}$) $>$& 0.0 & Q(9.375)=& 1334.
\\ $\mu_a$ = & & A=&38788.2
\\ $\mu_b$ = & 1.302 & B=&10056.5
\\ $\mu_c$ = & & C=&8886.8
\headend
The data set used is referenced by F. J. Lovas, H. Lutz, and H.
Dreizler, 1979, J. Phys. Chem. Ref. Data {\bf 8}, 1051 and W. Neustock,
A. Guarnieri, J. Demaison, and G. Wlodarczak, 1990, Z. Naturforsch. {\bf 45a},
702. The v designations of 0, 1, 2, 3 represent the AA, EE, EA, and AE states,
respectively. In order to keep the degeneracies within bounds, the standard
spin degeneracies were reduced by 2 and the partition function was also
reduced by 2. The weights used are 3, 8, 2, 1 for the ee and oo rotational states,
and 5, 8, 2, 3 for the oe and eo states. Note that there are numerous errors or
inconsistencies in the literature. The convention used here follows that of
R. Myers and E. B. Wilson, Jr., 1960, J. Chem. Phys. {\bf 33}, 186. The lines
were fit to a Hamiltonian that included terms up to the sixth power in angular
momentum as well as appropriate odd powers of angular momentum. Dependence on
K expected from an IAM treatment was incorporated using sine and cosine terms
in $2 \pi \rho_a K /3$. The quality of the fit was, on the average, twice the
experimental uncertainty. The EE and EA states have both b and c type lines,
while the AA and AE states have only b type lines.