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Title: Terahertz spectroscopy and global analysis of the rotational spectrum 
       of doubly deuterated Amidogen radical ND_2_ 
Authors: Melosso M., Degli Esposti C., Dore L. 
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Description of contents: 

    Files used with the SPFIT/SPCAT program suite are included as supplementary
    materials. There are 8 files of supplementary material, including this
    ReadMe, which was created by the AAS data editors.
    
    All files are text files, and are as follows:

    1_Explan.txt provides information on the content of the other files.
    2_ND_2.fit is the output file of the fit of spectroscopic data used in the present study.
    3_ND_2.lin is the corresponding line file.
    4_ND_2.par is the corresponding parameter file. 
    5_ND_2.cat is the output file of the prediction made with the parameters determined in this study.
    6_ND_2.var is the corresponding parameter file
    7_ND_2.int is the corresponding intensity file

System requirements:

    These files are output file and input files of the spfit/spcat program 
    by H. M. Pickett. The latest official version from 6 Nov. 2007 needs to be used.
    Information on the program is available on the following JPL web site:
    http://spec.jpl.nasa.gov/
    A particularly helpful document is spinv.pdf

Additional comments: 

    In addition, we recommend the following articles:

    H. M. Pickett:
    The fitting and prediction of vibration-rotation spectra with spin interactions
    https://doi.org/10.1016/0022-2852(91)90393-O

    H. M. Pickett et al.:
    Submillimeter, Millimeter, and Microwave Spectral Line Catalog
    https://doi.org/10.1016/S0022-4073(98)00091-0

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