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| Definition | Percentage of the sky hidden by all visible clouds. |
| Validity | Daily averaged |
| Comment | Computed from instantaneous values at 00, 06, 12 and 18Z |
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| 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 | = 8 | Nominal top of the atmosphere |
| Scale factor of second fixed surface | = all bits to 1 | Missing |
| Scaled value of second fixed surface | = all bits to 1 | Missing |
| GRIB 2 |
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| GRIB 2 and C-code for:Perturbed forecast, Control forecast, Perturbed re-forecasts and Control re-forecast | |||||||||||||||||||||||||