## LINE command help

              [ASTRO\]LINE Name Frequency Band [Lock [Center [Harm]]]
              [/MOLECULES File] [/SPECTRAL Unit Bandwidth LO3]

         Plot rest frequency coverage of  Plateau  de  Bure  Interferometer.
    The  command syntax is identical to that of the corresponding command in
    OBS.
         Name is a line name to label the plot
         Frequency is the center frequency in GHz
         Band should be USB or LSB
         Lock (optional) is LOW or HIGH
         Center (optional), the center IF2 frequency in MHz, default 350.
         Harm (optional), the harmonic number.

         The option /MOLECULES enables  to  plot  the  rest  frequencies  of
    several  transitions,  found  in  file  File.   This is a text file with
    entries:
    Freq    'chain'
    where Freq is the rest frequency in GHz and 'chain' the line name to  be
    plotted by GreG, between single quotes.  Example:
    88.632  'HCN'
    89.081  'HCO\u+'

         The option /SPECTRAL  is  used  to  specify  the  desired  spectral
    correlator configuration.
    - Unit is the unit number (1 to 6)
    - Bandwidth is the bandwidth in MHz (20, 40, 80 or 160)
    - LO3 is the center frequency (in MHz) of the band center,

              [ASTRO\]LINE/SPECTRAL Unit Bandwidth LO3
         Will overlay the specified correlator on a LINE plot

         Because only one synthesizer is used to generate the  1st  and  2nd
    LOs,  the  IF  frequency  is  slightly variable (between 1.500 and 1.550
    GHz), and the Doppler tracking is correct only for  the  specified  band
    (USB  or  LSB).   The  last  specified source is used to get the Doppler
    shift.   The  image  frequency  doppler  shift  is  wrong  by  at   most
    0.11 km/s for a two month experiment.