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| Start date | End date (short events) | Event type | Affected data | Description |
|---|---|---|---|---|
| 06/01/2021 | 08/01/2021 (~22UTC) | Data outage | ADS-C aircraft data | |
| 12/01/2021 | Data selection update | in-situ data | Monthly update of in-situ data selection | |
| 12/01/2021 | Land surface data selection update | Surface variables: T2M, RH2M and snow | ||
| 12/01/2021 | 17/01/2021 | Data reduction (technical issue) | E-AMDARs | Due to a change of BUFR master tables data were not ingested properly during the period. |
| 22/01/2021 | 28/01/2021 | Blocklist | Aeolus | Aeolus winds flagged invalid for this period, due to a test of the M1 mirror thermal control |
| 31/01/2021 | Data outage | Aeolus | Period of testing | |
| 03/02/2021 | Technical update | EUMETSAT AMVs (from Metops and Metesats) | Operational transition to the new BUFR format | |
| 02/02/2021 | Technical change | Cryosat-2 wave height | Change of data format that requires an update |