| Element |
Contents |
GRIB API keys
|
| 1 |
Data representation type (see WMO
code table 6); = 90. |
gridType
|
| 2 |
Number of points along the x-axis. |
Nx
Ni
|
| 3 |
Number of points along the y-axis. |
Ny
Nj
|
| 4 |
Latitude of the sub-satellite point. |
latitudeOfSubSatellitePointInDegrees*1000
|
| 5 |
Longitude of the sub-satellite point. |
longitudeOfSubSatellitePointInDegrees*1000
|
| 6 |
Resolution flag:
0 Direction increments are not given.
128 Direction increments are given.
|
ijDirectionIncrementGiven*128
|
| 7 |
Apparent diameter of the Earth in grid lengths in x
direction. |
apparentDiameterOfEarthInGridLengthsInXDirection
|
| 8 |
Apparent diameter of the Earth in grid lengths in y
direction. |
apparentDiameterOfEarthInGridLengthsInYDirection
|
| 9 |
X-coordinate of the sub-satellite point. |
xCoordinateOfSubSatellitePoint
|
| 10 |
Y-coordinate of the sub-satellite point. |
yCoordinateOfSubSatellitePoint
|
| 11 |
Scanning mode flag (see WMO
code table 8). |
iScansNegatively
jScansNegatively
jPointsAreConsecutive
|
| 12 |
Number of vertical coordinate parameters. |
NV
|
| 13 |
The orientation of the grid. |
orientationOfTheGridInDegrees*1000
|
| 14 |
Altitude of the camera from the Earth's centre divided
by the Earth's radius and scaled by 10**6 to give an integer value.
Currently = 6610839 for Meteosat. For orthographic view from infinite
distance, the value is 16777215. |
altitudeOfTheCameraFromTheEarthSCenterMeasuredInUnitsOfTheEarth
|
| 15 |
X coordinate of the origin of the sector image. |
xCoordinateOfOriginOfSectorImage
|
| 16 |
Y coordinate of the origin of the sector image. |
yCoordinateOfOriginOfSectorImage
|
| 17 |
0 Regular grid. |
gridType
|
| 18 |
Earth flag:
0 Earth assumed spherical with radius 6367.47 km.
64 Earth assumed oblate spheroidal with size as determined by IAU in 1965:
6378.160km, 6356.775km, f=1/297.0
|
earthIsOblate
|
| 19 |
Components flag:
0 Resolved u and v components of vector quantities relative to easterly
and northerly directions.
8 Resolved u and v components of vector quantities relative to the
defined grid in the direction of increasing x and y (or i and j)
coordinates.
|
uvRelativeToGrid
|
| 20-22 |
Reserved. Set to 0. |
|
