| 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 |
Nj—number of points along a parallel |
| 35-38 |
Nj—number of points along a meridian |
| 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(s) at which the Mercator
projection intersects the Earth (Latitude(s) where Di and Dj are
specified) |
| 52-55 |
La2 ― latitude of last grid point |
| 56-59 |
Lo2 — longitude of last grid
point |
| 60 | Scanning mode (flags — see Flag Table 3.4) |
| 61-64 |
Orientation of the grid, angle between i
direction on the map and the Equator (see
Note1) |
| 65-68 |
Dj — longitudinal direction grid
length (see Note 2) |
| 69-72 |
Dj ― latitudinal direction grid length (see Note 2) |
| 72-76 | Nux – size of model forecast subdomain in x-direction (number of grid points) |
| 77-80 | Ncx – width of coupling area within forecast domain in x-direction (number of grid points) |
| 81-84 | Nuy – size of model forecast subdomain in y-direction (number of grid points) |
| 85-88 | Ncy – width of coupling area within forecast domain in y-direction (number of grid points) |
| Notes: 1. Limited to the range of 0 to 90 degrees; if the angle of orientation of the grid is neither 0 nor 90 degrees, Di and Dj must be equal to each other. 2. Grid lengths are in units of 10-3 m, at the latitude specified by LaD. 3. 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. |