$ -------------------------------------------------------------------- $
$ WAVEWATCH III Grid output post-processing                            $
$--------------------------------------------------------------------- $
$ First output time (yyyymmdd hhmmss), increment of output (s), 
$ and number of output times.
$
  20210401 000000  10800.  10
$
$ Fields requested --------------------------------------------------- $
$
$ Output request flags identifying fields as in ww3_shel.inp. See that
$ file for a full documentation of field output options. Namelist type
$ selection is used here (for alternative F/T flags, see ww3_shel.inp).
$
$ DPT CUR WND AST WLV ICE IBG D50 IC1 IC5 HS LM T02 T0M1 T01 FP DIR SPR
$ DP HIG EF TH1M STH1M TH2M STH2M WN PHS PTP PLP PDIR PSPR PWS PDP
$ PQP PPE PGW PSW PTM10 PT01 PT02 PEP TWS PNR UST CHA CGE FAW TAW TWA WCC
$ WCF WCH WCM SXY TWO BHD FOC TUS USS P2S USF P2L TWI FIC ABR UBR BED
$ FBB TBB MSS MSC DTD FC CFX CFD CFK U1 U2 
$
 N
   WND CUR ICE HS T01 T02 DIR FP DP PHS PTP PDIR UST CHA
$
$--------------------------------------------------------------------- $
$ netCDF version [3,4]
$        and variable type 4 [2 = SHORT, 3 = it depends , 4 = REAL]
$ swell partitions [0 1 2 3 4 5]
$ variables in same file [T] or not [F] 
$
 4 4
 0 1 2
 T
$
$ -------------------------------------------------------------------- $
$ File prefix
$ number of characters in date [0(nodate),4(yearly),6(monthly),8(daily),10(hourly)]
$ IX and IY ranges [regular:IX NX IY NY, unstructured:IP NP 1 1]
$
 ww3.         
 6
$
$ ----------------- FOR SMC GRID ONLY ---------------------------------$
$ SMC output type:
$    1 = Flat points file (1D sea point array)
$    2 = Regular gridded (2D lat/lon array over region)
$
$  1
$
$ For SMC output, the IX/IY range line is replaced with a domain
$ lat/lon range and `cellfac` parameter for SMC type 2 output.
$ First/Last lat/lon can be set to -999.9 to use edge of SMC grid.
$
$ For SMC type 1 output, only those points within the specified 
$ lat/lon ranges will be extracted:
$
$   first_lon, first_lat, last_lon, last_lat
$
$ For type 2 output, the range is used in conjunction with a fifth
$ integer `cellfac` parameter to specify the regular output grid
$ to area average the SMC grid to. In this case, the output grid will
$ be aligned to nearest largest SMC grid points within the selected 
$ region. Therefore, the output grid start and end lat/lons may differ 
$ slightly from what is requested. In order to obtain a fully populated
$ regular grid the extents specified should encompass the SW corner of
$ the bottom left cell, and NE corner of the top right cell required.
$ `cellfac` is an integer value that selects the target grid cell size
$ as multiple of the smallest SMC grid cell. It must be a power of 2.
$ e.g. 1 = highest resolution, 2 = half resolution of smallest cell, 
$ 4 = 1/4 res of smallest cell, etc.
$
$   first_lon, first_lat, last_lon, last_lat, cellfac
$ 
$ Example: Extract high resolution data for U.K.:
$
$ -13.50  46.85  5.50  61.0  1
$
$
$ ---------------- FOR NON-SMC GRIDS --------------------------------- $
$ IX, IY range:
 1 1000000 1 1000000 
$
$ For each field and time a new file is generated with the file name
$ ww3.date_xxx.nc , where date is a conventional time indicator with S3
$ characters, and xxx is a field identifier.
$
$ -------------------------------------------------------------------- $
$ End of input file                                                    $
$ -------------------------------------------------------------------- $