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| Name | orography | Abbreviation | orog | Unit | gpm |
| Definition | The height of the terrain with respect to the model defined globe. |
| Validity | Fixed |
| Comment | Archived once a day at 00Z for control forecast and re-forecast, only. |
GRIB2 definition
| Parameter |
|---|
| Discipline | 0 | land surface products |
| Parameter Category | 3 | mass |
| Parameter Number | 5 | geopotential height |
| Level |
|---|
| Type of first fixed surface | 1 | ground or water surface |
| Scale factor of first fixed surface | all bits to 1 | missing |
| Scaled value of first fixed surface | all bits to 1 | missing |
| Type of second fixed surface | all bits to 1
| missing |
| Scale factor of second fixed surface | all bits to 1 | missing |
| Scaled value of second fixed surface | all bits to 1 | missing |