| Level |
|---|
| Type of first fixed surface | = 1 | Ground or water surface |
| Scale factor of first Type of second fixed surface | = 8all bits to 1 | Missing |
| Scaled value Scale factor of first fixed surface | = All 1'sScale factor all bits to 1 | Missing |
| Type of second fixed surface | = 8
| Nominal top of the atmosphere |
| Scale factor of second | All 1'sScaled value of first fixed surface | = | All 1'sall bits to 1 | Missing |
| Scaled value of second fixed surface | = | All all bits to 1 | 'sGRIB 2 and C-code for:Perturbed forecast, Control forecast, Perturbed re-forecasts and Control re-forecast | Missing |