SNTSER draws a time series at a sounding station.

INPUT PARAMETERS
 
    SNFILE    *Sounding data file
    DATTIM    *Date/time
    TAXIS     *Time1-time2-tinc;lbl;gln;tck
    LEVELS    *Vertical levels
    VCOORD    *Vertical coordinate type
    SNPARM    *Sounding parameter list
    STNDEX    *Stability indices
    AREA      *Data area
    PTYPE     *Plot type/h:w ratio/margins
    YAXIS     *Ystrt/ystop/yinc/lbl;gln;tck
    BORDER    *Background color/dash/width
    LINE      *Line color/type/width/label
    MARKER    *Marker color/type/size/width/hw
    TITLE     *Title color/line/title
    CLEAR     *Clear screen flag
    PANEL     *Panel location/color/dash/width
    DEVICE    *Graphics device
 
 

PROGRAM DESCRIPTION
 
    SNTSER draws a time series plot for a sounding station.

    Only one parameter may be plotted at a time.  This parameter
    may be a level parameter defined in SNPARM or a stability
    index defined in STNDEX.  If both SNPARM and STNDEX have
    values, SNPARM will be used.  If a level parameter is
    defined in SNPARM, a vertical level must also be set in
    LEVELS.

    The type of y axis can be set in PTYPE.  Either LIN or LOG
    is valid.  The limits on the y axis can be set in YAXIS.

    The times to plot are specified in DATTIM.  Only those
    times specified will be plotted.  Lines will be drawn
    connecting the data points, provided that no more than two
    points are missing between segments.

    The time axis is specified in TAXIS using the usual GEMPAK
    date/time conventions, including FIRST and LAST.  If
    TAXIS has no increment, a reasonable value is chosen.
    If TAXIS is blank, the limits are taken from the first and
    last valid times set in DATTIM.

    When the user desires multiple lines on the same graph, TAXIS
    and YAXIS should be explicitly set.  Then LINE, MARKER, and
    TITLE can be varied for successive combinations of LEVELS,
    VCOORD, AREA, and SNPARM.

    The height-to-width ratio of the plot may be specified in
    PTYPE following a slash.  If no value is entered, a value of
    0.5 will be used.


EXAMPLES
 
    1.  Plot the temperature in Celsius at the 500-mb level over
        BWI for the times between 26/12 and 31/00 in the file.
        Use the default line, marker, title and background colors.
        Label the Y axis from -40 degrees to 0 degrees in
        increments of 10 degrees.  Label the T axis from 26/00
        to 31/12 with internally chosen increments.

        SNFILE   =  realtime.snd
        DATTIM   =  26/12-31/00
        TAXIS    =  26/00-31/12
        LEVELS   =  500
        VCOORD   =  pres
        SNPARM   =  tmpc
        STNDEX   =
        AREA     =  @bwi
        PTYPE    =  /.5
        YAXIS    =  -40/0/10
        BORDER   =  1
        LINE     =  2/1/1
        MARKER   =  1
        TITLE    =  5
        CLEAR    =  yes
        PANEL    =  0
        DEVICE   =  vt


    2.  Now, using the same file, plot a time series of the
        lifted index at OKC for all times in the file.  Plot the
        line with a thick, short dash pattern and use internal
        scaling for both axes.

        DATTIM   =  all
        TAXIS    =
        SNPARM   =
        STNDEX   =  lift
        AREA     =  @okc
        YAXIS    =
        LINE     =  2/2/3


ERROR MESSAGES
 
    [SNTSER  +2]    WARNING, invalid PTYPE, LIN will be used.
    [SNTSER  +1]    WARNING, more than one parameter specified.
    [SNTSER  -1]    Fatal error initializing TAE.
    [SNTSER  -2]    Fatal error reading TAE parameters.
    [SNTSER  -3]    Fatal error initializing GEMPLT.
    [SNTSER  -4]    Input for LEVEL is invalid.
    [SNTSER  -5]    Error defining graph coordinates.
    [SNTSER  -6]    No points found for plot.
    [SNTSER  -7]    Session not interactive.
    [SNTSER  -8]    No parameters entered.
    [SNTSER  -9]    Parm ... not calculable.
    [SNTSER -10]    Parm ... is a character.
    [SNTSER -11]    PTYPE chosen is invalid.