TRACE

     TRACE parameters contain specifications for each trace on the
     meteogram in the following format:
 
		parameters/colors/range/witnes!parameters/colors/range/witnes
 
     The parameters before the ! will be plotted on the left of the plot; 
     those after the ! will be plotted on the right.  The parameters may 
     be any GEMPAK surface parameter.  Real-valued parameters will be 
     drawn as a graph.  Character valued parameters will be rotated 90 
     degrees and written on the plot.  Symbol parameters will be drawn
     as symbols.

     For GUST and GUMS, the character G will be plotted.  Up to four 
     parameters may be plotted along each axis.  The parameters must 
     be separated using semicolons.  Character and weather symbol data 
     may only be plotted in positions 1, 2 or 3.

     Each parameter name may be followed by a colon, the size or line type,
     a second colon and the width.  For example, WSYM:.5:5 will draw weather
     symbols half the default size with a line width of 5.  For example,
     TMPF:3 will plot a temperature line using dash pattern 3.

     The colors for the parameters must also be separated using semicolons.  
     If a single number is entered, all parameters are drawn in that color.  
     If a zero is entered, the current default color is used.

     The range specifies the scaling of the y axis.  The format is: 
     start;stop;increment.  Note that in this program, the parts of range 
     must be separated using semicolons.  If no range is given, it is 
     selected using the data values.

     Witness lines are specified in WITNES.  These are horizontal dotted 
     lines.  A list of y values may be entered separated by semicolons.  
     If the value of witnes is YES, a witness line will be centered on 
     the plot.