| Octet No. | Contents |
|---|---|
| 15 |
Shape of the Earth (See Code Table
3.2) |
| 16 |
Scale factor of radius of
spherical Earth |
| 17-20 |
Scale value of radius of
spherical Earth |
| 21 |
Scale factor of major axis of
oblate spheroid Earth |
| 22-25 |
Scaled value of major axis of
oblate spheroid Earth |
| 26 |
Scale factor of minor axis of
oblate spheroid Earth |
| 27-30 |
Scaled value of minor axis of oblate spheroid Earth |
| 31-34 |
Nx ― number of points
along the x-axis |
| 35-38 |
Ny — number of points along the y-axis |
| 39-42 |
La1― latitude of first grid point |
| 43-46 |
Lo1― longitude of first grid point |
| 47 |
Resolution and component flags (see Flag Table 3.3) |
| 48-51 |
LaD ― latitude where Dx and Dy are specified |
| 52-55 |
LoV ― longitude of meridian parallel to y-axis along which latitude increases as the y-coordinate increases |
| 56-59 |
Dx ― x-direction grid length (see
Note 1) |
| 60-63 |
Dy ― y-direction grid length (see Note 1) |
| 64 |
Projection centre flag (see Flag Table 3.5) |
| 65 | Scanning mode (see Flag Table 3.4) |
| 66-69 |
Latin 1 ― first latitude from the pole at which the secant cone cuts the sphere |
| 70-73 |
Latin 2 ― second latitude from
the pole at which the secant cone cuts the sphere |
| 74-77 |
Latitude of the southern pole of
projection |
| 78-81 |
Longitude of the southern pole
of projection |
| 82-85 | Nux – size of model forecast subdomain in x-direction (number of grid points) |
| 86-89 | Ncx – width of coupling area within forecast domain in x-direction (number of grid points) |
| 90-93 | Nuy – size of model forecast subdomain in y-direction (number of grid points) |
| 94-97 | Ncy – width of coupling area within forecast domain in y-direction (number of grid points) |
| Notes: 1. Grid lengths are in units on 10-3 m, at the latitude specified by LaD. 2. If Latin 1 = Latin 2, then the projection is on a tangent cone. 3. The resolution flags (bits 3-4 of Flag table 3.3) are not applicable. 4. LoV is the longitude value of the meridian which is parallel to the y-axis (or columns of the grid) along along which latitude increases as the y-coordinate increase (the orientation longitude may or may not appear on a particular grid). 5. A scale value of radius of spherical Earth, or major or minor axis of oblate spheroid Earth is derived from applying appropriate scale factor to the value expressed in metres. |