eccodes/definitions/grib2/template.3.120.def

# (C) Copyright 2005- ECMWF.

# TEMPLATE 3.120, Azimuth-range projection
#  Nb - number of data bins along radials (A data bin is a data point representing the volume centred on it)
unsigned[4] numberOfDataBinsAlongRadials ;
alias Nb =  numberOfDataBinsAlongRadials;

#  Nr - number of radials
unsigned[4] numberOfRadials ;
alias Nr  = numberOfRadials;

#  La1 - latitude of centre point
signed[4] latitudeOfCentrePoint ;
alias La1 =  latitudeOfCentrePoint;
meta  geography.latitudeOfCentrePointInDegrees
        scale(latitudeOfCentrePoint,one,grib2divider,truncateDegrees) : dump;
alias La1InDegrees=latitudeOfCentrePointInDegrees;

#  Lo1 - longitude of centre point
unsigned[4] longitudeOfCentrePoint ;
alias Lo1 =  longitudeOfCentrePoint;
meta  geography.longitudeOfCentrePointInDegrees
        scale(longitudeOfCentrePoint,one,grib2divider,truncateDegrees) : dump;
alias Lo1InDegrees=longitudeOfCentrePointInDegrees;

#  Dx - spacing of bins along radials
unsigned[4] spacingOfBinsAlongRadials ;
alias Dx  = spacingOfBinsAlongRadials;

#  Dstart - offset from origin to inner bound
unsigned[4] offsetFromOriginToInnerBound ;
alias Dstart =  offsetFromOriginToInnerBound;

include "grib2/template.3.scanning_mode.def";

# Octets 40-(39+4Nr) : For each of Nr radials:
radials list(numberOfRadials){
  # Azi - starting azimuth, degrees x 10 (degrees as north)
  signed[2] startingAzimuth;
  alias Azi = startingAzimuth;
  # Adelta - azimuthal width, degrees x 100 (+ clockwise, - counterclockwise)
  signed[2] azimuthalWidth;
  alias Adelta = azimuthalWidth;
}