SFL604 lists data from a GEMPAK surface file in a fixed format.


INPUT PARAMETERS
 
    SFFILE    *Surface data file
    AREA      *Data area
    DATTIM    *Date/time
    OUTPUT    *Output device/filename
    SKPMIS    *Skip missing data flag
    IDNTYP    *STNM or STID
    SFPARM    *Surface parameter list
 
 
PROGRAM DESCRIPTION
 
    SFL604 lists data from a surface file in a format designed to
    display airways data.

    Data will be listed for the stations and times requested in
    AREA and DATTIM.  If SKPMIS is YES, stations that are within
    the area requested, but have not reported data, will not
    be listed.  If SKPMIS is set to NO, then only the date and
    station identifier will be listed for nonreporting stations.

    Stations may be identified in the output listing by character
    or numeric identifier.  This is accomplished by setting IDNTYP
    to STID or STNM.

    This program will list predefined parameters only.  However,
    stations may be selected using conditions in SFPARM.  For
    example, if SFPARM = WTHR=S+, then only those stations
    reporting heavy snow will be listed.  The conditions specified
    in SFPARM can be for any computable parameter, not just
    those to  be listed.


EXAMPLES
 
    1.  List the data to a file for all the stations in Maryland
        at the most recent time.

        SFFILE  =  data:newsfc.dat
        AREA    =  @md
        DATTIM  =  last
        OUTPUT  =  f
        SKPMIS  =  yes
        IDNTYP  =  stid
        SFPARM  =

    2.  List the data at 12Z and 13Z at BWI and DCA.  The following
        parameters must be changed from example 1:

        DATTIM  =  /12-/13
        AREA    =  @bwi;dca

    3.  List all stations in Delaware, including nonreporting
        stations.  Identify the stations with a station number.
        The following parameters must be changed from example 1:

        AREA    =  @de
        SKPMIS  =  no
        IDNTYP  =  stnm

    4.  List all stations reporting temperatures greater than or
        equal to 75 degrees.  The following parameters must be changed
        from example 1:

        SFPARM = tmpf>75


ERROR MESSAGES
 
    [SFL604  +1]    Parameter ... cannot be computed.
    [SFL604  -1]    Fatal error initializing TAE.
    [SFL604  -2]    Fatal error reading TAE parameters.
    [SFL604  -3]    No valid stations could be found.
    [SFL604  -4]    No parameters can be computed.