% @(#)apply_disp.hlq	17.1.1.1 (ESO-IPG) 01/25/02 17:53:22
%++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
%.COPYRIGHT  (c)  1993 European Southern Observatory
%.IDENT      apply_disp.hlq
%.AUTHOR     23-MAR-93, IPG/ESO
%.KEYWORDS   MIDAS, help files, 
%.PURPOSE    On-line help file for the command: APPLY/DISPERSION
%.VERSION    1.0  PB : Creation, 23-MAR-93
%----------------------------------------------------------------
\se
SECTION./DISPERSION
\es\co
APPLY/DISPERSION					   PB  23-MAR-93
\oc\su
APPLY/DISPERSION  in  out  [y]  [coef]
	Apply the dispersion relation to a 1D spectrum and generates a table
\us\pu
Purpose:    
            The dispersion relation is taken from the coefficients table
            (keyword COERBR, default: coerbr.tbl) and applied to a 1D 
            spectrum or a given row of a long-slit spectrum. The
            output spectrum is presented as a table in order to avoid
            interpolations.
\up\sy
Syntax:     
            APPLY/DISPERSION in  out  [y]  [coef]
\ys\pa
            in     = Name of the input image
\ap\pa
            out    = Name of the output table
\ap\pa
            y      = Spectrum position. The position can be provided
                     in pixels (if preceded by an @ sign) or in world
                     coordinates. If the input image is a 1D spectrum, 
                     the dispersion relation will be read at position
                     y in the coefficients table.
                     Default : @{YSTART}
\ap\pa
            coef   = Name of the coefficients table.\\
                     Session keyword : COERBR\\
                     Default : coerbr.tbl
\ap\sa
See also: 
            CALIBRATE/LONG, REBIN/LONG, RECTIFY/LONG, PLOT/SPECTRUM
\as\no
Note:       
            1) Command CALIBRATE/LONG must have been executed previously
               to generate the coefficients table.
\\
            2) Command PLOT/SPECTRUM can be used to visualize the output
               table
\on\exs
Examples:
\ex
            APPLY/DISPERSION  ccd0001  sptab  @300 
\xe\ex
            PLOT/SPECTRUM     sptab
\xe \sxe