SFEDIT adds or changes data in a surface file using a sequential
text file.


INPUT PARAMETERS
 
    SFEFIL    Surface edit file
    SFFILE    Surface data file
 
 
PROGRAM DESCRIPTION
 
    SFEDIT adds information from a sequential text file to an
    existing GEMPAK surface file.  The program may be used to add
    new data to a file or to change existing values.  The output
    file must already exist.

    The data to be added must reside in a text file, SFEFIL.  This
    file can be created by specifying F as the output device in
    GEMPAK program SFLIST or by generating the file with a text
    editor.  A text editor may be used to change the file.

    The parameters to be edited must be specified at the beginning
    of the edit file, for example:  PARM=TMPF;DWPF.  Only
    parameters stored in the output file can be edited.  Parameters
    that have character values, such as WTHR, are actually stored
    as real numbers.  Thus, the numeric weather code must be used.
    Station information, such as the latitude, SLAT, cannot be
    changed using this program.  Rather, these changes can be
    made using the GEMPAK program, SFSTNS.

    The data follow the parameter list.  Each data listing must
    include the time, followed by the station character or
    numeric identifier followed by the data.  If data are
    missing, the current missing data value, -9999., must be
    used.  Blank fields will not be recognized.

    If a station or time does not exist in the output file it will
    be added to the file.  If stations are added, the GEMPAK
    program SFSTNS can be used to add station latitudes, longitudes
    and elevations.


EXAMPLES
 
    1.  Change values of TMPF and DWPF in the file SFCDATA.DAT.

        SFEFIL  = sflist.fil
        SFFILE  = sfcdata.dat

        The file SFLIST.FIL follows.  Note that the title line
        is ignored.

	PARM = TMPF;DWPF

	STN  YYMMDD/HHMM 	TMPF	DWPF
	BWI  850426/0400       55.40   42.80
	SBY  850426/0400       62.62   55.40
	BGJ  850426/0400       55.40   42.80

       The program replaces the temperature and dewpoint for
       stations BWI, SBY and NHK at the given time values in
       output file SFCDATA.DAT.


ERROR MESSAGES
 
    [SFEDIT  +2]    Station ... cannot be added to the file.
    [SFEDIT  -1]    Fatal error initializing TAE.
    [SFEDIT  -2]    Fatal error reading TAE parameters.
    [SFEDIT  -3]    Edit file ... cannot be opened.
    [SFEDIT  -5]    PARM keyword not found.
    [SFEDIT  -6]    Too many parameters to edit.
    [SFEDIT  -7]    Time ... cannot be added to data set.
    [SFEDIT  -8]    Parameter ... is not in the data set.
    [SFEDIT  -9]    SFEDIT cannot continue with invalid parameters.
    [SFEDIT -10]    Missing lat/lon pair for ship file