\\ Species Tag:        &   63004 & Name:&  HNO$_3$ $\nu_6$          
\\ Version:            &       2 & & Nitric acid
\\ Date:       &  Jul. 2004      & & 
\\ Contributor:&  B. J. Drouin, E. A. Cohen, D. T. Petkie    &  & 
\\             &                 & & 
\\ Lines Listed:       &   66984 & Q(300.0)=&   110248.049 
\\ Freq. (GHz) $<$     &    2114 & Q(225.0)=&    60668.605 
\\ Max. J:             &     150 & Q(150.0)=&    30214.599 
\\ LOGSTR0=            &   -10.0 & Q(75.00)=&    10483.257 
\\ LOGSTR1=            &    -8.0 & Q(37.50)=&     3709.987 
\\ Isotope Corr.:      &       0 & Q(18.75)=&     1315.069 
\\ Egy. (cm$^{-1}$) $>$&     0.0 & Q(9.375)=&      467.431 
\\ $\mu_a$ = & 1.986             & A=& 13006.201
\\ $\mu_b$ = & 0.882             & B=& 12057.503
\\ $\mu_c$ = &                   & C=&  6282.339
\headend 

The data set used in this fit is that of  D.T. Petkie {\it et al.}, 
Journal of Molecular Spectroscopy 218 (2003) 127, 130, and references 
cited therein.  There are many unresolved asymmetry multiplets in the data set.  
For the purpose of fitting, these were usually assigned to a single component.  
The merged file reflects this.  The dipole moment was taken from the remeasurements report by A. P. Cox
and J. M. Riveros, 1965, J. Chem.~Phys.~{\bf 42}, 3106.  Nitrogen quadrupole splittings
were fitted for many low-J transitions, the catalog prediction now includes all quanta in spin.  
The partitioning of this molecule into accessible vibrational states is over 30\% at room temperature.
Since the full rotational-vibrational partitioning is well known for states $<$ 1000 cm$^{-1}$, the
vibrational partitioning has been included in the catalog prediction.  For states below 1000 cm$^{-1}$, 
the sum-over-states calculation is explicitly used, for states above 1000 cm$^{-1}$, the harmonic-oscillator 
approximation is used.  Comparison of the H.O. approximation and the sum-over-states method for states below 
1000 cm$^{-1}$ shows agreement to $<$0.2\% at 300 K.  Truncation of the sum-over-states method to J $<$ 99
produces less than 0.003\% error.