Wind input files
At present, for different wind input files, different headers are used, which are read in different ways in the sourcecode. Some effeort has been put to in making the files more self-descriptive, readible and to make the input of the different files more consistent. For three wind-input options, a suggestion to standardise the headers is shown below. The suggestion is conform the possible transition NetCDF format in the future. See NetCDF standard names for more information on the used standard NetCDF names. An integrated file format is proposed which can be used for all wind input options. Comments are indicated by a # (this is open for discussion).
# START OF HEADER # This file is created by Deltares # Additional commments # General part: t_ref = 19991026.000000 # Reference time t_ref_unit = ModifiedJulianDay # Unit used for reference time t_unit = min # Time unit (sec, min, hrs, etc.) #t_unit = hrs missing_value = -999.000 # Value used for undefined or missing data # For Pseudo ArcInfo or Spiderweb wind: n_cols = 400 # Number of columns used for wind datafield n_rows = 16 # Number of rows used for wind datafield grid_unit = degree # Unit of distances on the grid in both x- and y-direction #grid_unit = m # Only for Pseudo ArcInfo wind: x0 = -12.000 # Xcoordinate of starting point of grid (in units specified in grid_unit) y0 = 48.000 # Ycoordinate of starting point of grid (in units specified in grid_unit) value_pos = centre # Location where the data is specified in a cell (centre or corner) #value_pos = corner dx = 0.12500 # Grid dimensions: dx and dy (in units specified in grid_unit) dy = 0.083333333 n_quantity = 3 # Number of quantities prescribed in the file quantity1 = x_wind # Name of quantity1 quantity2 = y_wind # Name of quantity2 quantity3 = air_pressure # Name of quantity3 unit1 = m s-1 # Unit of quantity1 unit2 = m s-1 # Unit of quantity2 unit3 = Pa # Unit of quantity3 # Only for Spiderweb wind: radius = 600000.00 # Radius of spiderweb (in units specified in rad_unit) rad_unit = m # Unit of radius n_quantity = 3 # Number of quantities prescribed in the file quantity1 = wind_speed # Name of quantity1 quantity2 = wind_from_direction # Name of quantity2 quantity3 = p_drop # Name of quantity3 unit1 = m s-1 # Unit of quantity1 unit2 = degree # Unit of quantity2 unit3 = Pa # Unit of quantity3 # Only for wind on a separate curvi-linear grid: grid_file = hirlam.grd # Separate (curvi-linear) grid on which the wind can be specified first_row = nmax # These four parameters determine the order in which the data last_row = 1 # is read from the separate wind file. In this way, data which is first_col = 1 # supplied in a reversed order, can also be read. last_col = mmax n_quantity = 1 # Number of quantities prescribed in the file quantity1 = air_pressure # Name of quantity1 unit1 = Pa # Unit of quantity1 # END OF HEADER TIME = 0.0000000E+00 # Time where first dataset is supplied # Only for Spiderweb wind (every TIME input): x_eye = 115.4 # Xcoordinate of cyclone eye (Spiderweb centre) at specified TIME y_eye = 18.9 # Ycoordinate of cyclone eye (Spiderweb centre) at specified TIME p_drop_eye = 5300 # Pressure drop at cyclone eye (Spiderweb centre) at specified TIME # Actual data field 1.388999 1.388999 1.388999 1.388999 1.388999 1.388999 1.388999 1.388999 1.388999 1.388999 155.0000 346.2500 357.5000 8.750000 20.00000 31.25000 42.50000 53.75000 65.00000 76.25000 5300.000 5300.000 5300.000 5300.000 5300.000 5300.000 5300.000 5300.000 5300.000 5300.000 TIME = 1440 # Time where next dataset is supplied # Only for Spiderweb wind (every TIME input): x_eye = 114.4000 # Xcoordinate of cyclone eye (Spiderweb centre) at specified TIME y_eye = 18.90000 # Ycoordinate of cyclone eye (Spiderweb centre) at specified TIME p_drop_eye = 5300.000 # Pressure drop at cyclone eye (Spiderweb centre) at specified TIME # Actual data field 2.435253 2.435253 2.435253 2.435253 2.435253 2.435253 2.435253 2.435253 2.435253 2.435253 65.01978 75.11859 85.25320 95.45370 105.7529 116.1833 126.7762 137.5612 148.5649 159.8090 5298.544 5298.544 5298.544 5298.544 5298.544 5298.544 5298.544 5298.544 5298.544 5298.544
