GEMPAK Manual |
Programs
DCISIG
DCISIG decodes international SIGMET reports from a real-time data
feed, or from a file fed to the program through standard input, and
writes the data to an ASCII file. The program is controlled by
inputs to the command line.
The inputs are program options and the output file name or template.
For example, for real-time data feeds:
dcisig [options] output_file
If running the program interactively with standard input, the -c
option must be used. The input file must also be specified.
For example:
dcisig -c YYMMDD/HHNN [other_options] output_file < input_file
A template may be used to specify the output file name. The file
name template uses the date and time of the bulletin or report
to replace the following characters.
YYYY or YY Year with or without the century
MM Month number
DD Day
HH Hour
NN Minute
The format of the output ASCII file is as follows:
|Type|Start_tm|End_tm|Msg_id|Seq_num|Orig_id|Flt_lvl|Dir|Spd|Name_Loc|Corr
Lat1 Lon1
Lat2 Lon2
Lat3 Lon3
Lat4 Lon4
. .
. .
. .
Where: Type is TS (thunderstorm), TB (turbulence), HU (hurricane),
TR (tropical storm), TD (tropical depression),
VA (volcanic ash cloud), MW (marked mountain waves),
TC (tropical cyclone), SQ (squall line), CT (CAT),
IC (icing), GR (hail), DS (duststorm), SS (sandstorm),
CB (cumulonimbus), WS (low level wind shear, or CN (cancel)
Start_tm and End_tm are full GEMPAK date/time strings
Msg_id is the message identification
Seq_num is the message sequence number
Ori_id is the originating station ID taken from the WMO header
for the message or location ID for KKCI
Flt_lvl is the flight level (or flight level range,
expressed as nnn-nnn) in hundreds of feet
Dir is the direction of movement of the phenomenon
Spd is the speed of the phenomenon in knots
Name_Loc is the name of the storm, where applicable, or
location of the volcano, where applicable, or the
word, OTHER, for reports not from CONUS, Hawaii, Guam,
Japan, UK, Tahiti, and Cuba
Corr is a flag indicating a correction,amendment or update (0 or 1)
Extra spaces may appear anywhere in this line of information,
except in the first character position. The first character must
be a bar (|).
The latitude and longitude values describing the bounds of the
phenomenon are read using the FORTRAN format (2F9.2). The number
of points may vary. For a phenomenon at a point (e.g., a
hurricane), only that point is specified. For a phenomenon
centered at a point (e.g., a thunderstorm), the first point is
the center and the second point gives the radius (in nautical
miles), followed by RMISSD.