SFDSL604 lists data from a GEMPAK surface file in a fixed format
for use on the AMS DataStreme web site.

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
 
    SFDSL604 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 for all stations in Pennsylvania at
	the most recent time.

	SFFILE	 =  $GEMPAK/data/HRCBOB.SFC
	AREA	 =  @pa
	DATTIM	 =  last
	OUTPUT	 =  t
	SKPMIS	 =  yes
	IDNTYP	 =  stid
	SFPARM	 =

    2.	List the data for all times at PHL.

	SFFILE	 =  $GEMPAK/data/HRCBOB.SFC
	AREA	 =  @phl
	DATTIM	 =  all
	OUTPUT	 =  t
	SKPMIS	 =  yes
	IDNTYP	 =  stid
	SFPARM	 =

    3.	List all stations in Pennsylvania, including nonreporting
	stations for the last time.

	SFFILE	 =  $GEMPAK/data/HRCBOB.SFC
	AREA	 =  @pa
	DATTIM	 =  last
	OUTPUT	 =  t
	SKPMIS	 =  no
	IDNTYP	 =  STID
	SFPARM	 =

    4.	List all stations in Pennsylvania where there are reported
	thunderstorms.

	SFFILE	 =  $GEMPAK/data/HRCBOB.SFC
	AREA	 =  @pa
	DATTIM	 =  LAST
	OUTPUT	 =  t
	SKPMIS	 =  yes
	IDNTYP	 =  STID
	SFPARM	 =  wthr=t

ERROR MESSAGES
 
    [SFDSL604  +1]  Parameter ... cannot be computed.
    [SFDSL604  -1]  Fatal error initializing TAE.
    [SFDSL604  -2]  Fatal error reading TAE parameters.
    [SFDSL604  -3]  No valid stations could be found.
    [SFDSL604  -4]  No parameters can be computed.