Octet No. 
Contents 
15 
Spectral representation type (See Code Table 3.6) 
1619 
N – biFourier resolution parameter 
2023 
M – biFourier resolution parameter 
24 
BiFourier truncation type (See Code Table 3.25) 
2532 
Lx – size in metres of the domain along xaxis 
3340 
Lux – size in metres of model forecast subdomain along xaxis 
4148 
Lcx – width in metres of coupling area within forecast domain along xaxis 
4956 
Ly – size in metres of the domain along yaxis 
5764 
Luy – size in metres of model forecast subdomain along yaxis 
6572 
Lcy – width in metres of coupling area within forecast domain along yaxis 
73 
Shape of the Earth (See Code Table 3.2) 
74

Scale factor of radius of
spherical Earth

7578

Scale value of radius of
spherical Earth

79

Scale factor of major axis of
oblate spheroid Earth

8083

Scaled value of major axis of
oblate spheroid Earth

84

Scale factor of minor axis of
oblate spheroid Earth

8588

Scaled value of minor axis of
oblate spheroid Earth

8992

La_{1 }― latitude of
first grid point 
9396 
Lo_{1 }― longitude of
first grid point 
97100 
LaD ― latitude where Dx and Dy
are specified 
101104 
LoV ― longitude of meridian parallel to
yaxis along which latitude increases as the ycoordinate increases 
105 
Projection centre flag (see Flag
Table 3.5) 
106109 
Latin 1 ― first latitude from
the pole at which the secant cone cuts the sphere 
110113 
Latin 2 ― second latitude from
the pole at which the secant cone cuts the sphere

114117 
Latitude of the southern pole of
projection

118121 
Longitude of the southern pole
of projection
