GEMPAK Manual |
Programs
SNCFIL creates a new GEMPAK sounding file.
INPUT PARAMETERS
SNOUTF Output sounding file
SNPRMF Sounding parameter packing file
STNFIL Station information file
MRGDAT Merge data file flag/part type
TIMSTN Times/additional stations
PROGRAM DESCRIPTION
SNCFIL creates a GEMPAK sounding file. The file may be
created to store merged or unmerged data. Merged data files
may contain any meteorological parameters with all parameters
included at each level. Unmerged files store the mandatory
data and significant-level temperature and wind data as
separate parts.
MRGDAT must be set to YES or NO. If YES, a merged file will
be created. The parameters to be included in the file must be
specified in SNPRMF. If MRGDAT is NO, an unmerged file will be
created. In this case, the type of unmerged file can be included
following a slash. Type 1 creates a file with only mandatory
data below 100 mb. Type 2 specifies a file with mandatory and
significant-level data below 100 mb, and type 3, which is the
default, specifies a file with mandatory and significant-level
data below and above 100 mb.
SNPRMF contains information about the parameters to be included
in a merged file. Either a list of parameters or the name of a
packing file may be entered. If a list is entered, the parameters
must be separated with semicolons; packing information may also
be included after a slash with the minimum and maximum values
and the resolution separated using dashes. For example, to
include temperature and dewpoint in a file without packing,
SNPRMF may be entered as:
SNPRMF = TMPC;DWPC
To pack the data, use:
SNPRMF = TMPC/-127-63-.1;DWPC/-63-63-.1
SNPRMF may also contain the name of a packing file. A packing
file for data which is not to be packed contains a list of
parameters with one parameter per line. In a file for packed
data, each line must include the parameter name, the minimum
and maximum data values and the resolution, all separated with
spaces. The default packing file for merged sounding data is
SNPACK.TBL.
If STNFIL is not blank, information about all the stations in
STNFIL will be added to the data set. Space will be left in the
file for the additional number of stations specified as the
second parameter in TIMSTN. Note that an error will result if
STNFIL is blank and TIMSTN does not request additional stations.
EXAMPLES
1. Create a sounding file called SOUND.DAT containing merged
data. Use the standard station and parameter files. Leave
room in the file for 100 stations in addition to the stations
in STNFIL and allow 15 times to be added to the file.
SNOUTF = sound.dat
SNPRMF = snpack.tbl
STNFIL = snstns.tbl
MRGDAT = yes
TIMSTN = 15/100
2. Create an unmerged sounding file called WEEKLY.SND which
will store mandatory and significant-level data below and
above 100 mb. Do not add any stations now. Leave room for
14 times and 300 stations.
SNOUTF = weekly.snd
SNPRMF =
STNFIL =
MRGDAT = no/3
TIMSTN = 14/300
ERROR MESSAGES
[SNCFIL +2] Negative number of stations entered -- 0 used.
[SNCFIL -1] Fatal error initializing TAE.
[SNCFIL -2] Fatal error reading TAE parameters.
[SNCFIL -3] Error opening station file ... .
[SNCFIL -4] File does not include room for any stations.
[SNCFIL -5] File does not include room for any times.
[SNCFIL -6] SNPRMF is incorrectly specified.
[SNCFIL -7] The file name for the new file is blank.
[SNCFIL -8] Vertical coordinate = ... -- specify more parameters.