| 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 | Monthly update of in-situ LDAS data selection | |
| 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 | 05/02/2021 | 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 | |
| 09/02/2021 | Data selection update | in-situ data | Monthly update of in-situ data selection | |
| 10/02/2021 | Land surface data selection update | Surface variables: T2M, RH2M and snow | Monthly update of in-situ LDAS data selection | |
| 12/02/2021 | 15/02/2021 | Blocklist | Aeolus | M1 telescope temperature test |
| 16/02/2021 | Technical change | Metop-B AMSUA Channel 6 | Increase of obs error for Metop-B AMSUA Ch6 to reduce the impact of the fast increasing noise of this channel | |
| 19/02/2021 | 22/02/2021 | outage | SSMIS (F17 and F18) | Ground segment anomaly |
| 20/02/2021 | 22/02/2021 | Outage | Metop-A MHS | Instrument anomaly |
| 26/02/2021 | 01/03/2021 | Blocklist | Aeolus | change in M1 mirror thermal control settings |
| 08/03/2021 | Data selection update | in-situ data | Monthly update of in-situ data selection | |
| 09/03/2021 | 12/03/2021 | Blocklist | Aeolus | M1 telescope temperature test |
| 10/03/2021 | Land surface data selection update | Surface variables: T2M, RH2M and snow | Monthly update of in-situ LDAS data selection | |
| 10/03/2021 | 16/03/2021 | Outage | Moored buoys from NDBC | Major outage of moored buoys from NDBC (see here) |
| 16/03/2021 | 18/03/2021 | Blocklist | Aeolus | M1 telescope temperature test |
| 22/03/2021 | 26/04/2021 | Outage | Aeolus | Laser FM-B in survival mode Update (07/05/2021): Aeolus data re-activated |
| 25/03/2021 | 06/04/2021 | Outage | SYNOP data from Mexico | |
| 01/04/20211 | 13/04/2021 | Outage (data format change) | Chinese aircraft data | Change if format to use WIGOS AMDAR BUFR format |
| 08/04/2021 | Data selection update | in-situ data | Monthly update of in-situ data selection | |
| 12/04/2021 | Land surface data selection update | Surface variables: T2M, RH2M and snow | Monthly update of in-situ LDAS data selection | |
| 13/04/2021 | Data resumption | AIRS | AIRS data are flowing again using a direct link to NASA | |
| 13/04/2021 | New data (monitored) | GOES-17 CSR | GOES-17 CSR passively monitored | |
| 13/04/2021 | 27/04/2021 | Blocklist | GOES-16 CSR | GOES-16 CSR temporarily blocklisted |
| 13/04/2021 | New data (monitored) | HY-2B scatterometer | HY-2B scatterometer passively monitored | |
| 11/05/2021 | New cycle implemented | 47R2 implementation | ||
| 12/05/2021 | Data selection update | in-situ data | Monthly update of in-situ data selection | |
| 12/05/2021 | Land surface data selection update | Surface variables: T2M, RH2M and snow | Monthly update of in-situ LDAS data selection. New snow observations from AEMET (Nivomet) are blocklisted till they are checked | |
| 13/05/2021 | Blocklist | CrIS | temporary preventive exclusion of CrIS (from NPP and NOAA20) to allow investigation of an issue that affected the analysis | |
| 17/05/2021 | 28/05/2021 | Outage | Aeolus | M1 telescope temperature test |
| 18/05/2021 | Activation | GOES-17 CSR | Activation of radiances from GOES-17 | |
| 22/05/2021 | Outage | SNPP CrIS | Side 2 Long wave IR failure. Update (02/06/2021): SNPP data resumed using the side-B (no LWIR). The data are blocked upstream at ECMWF till the switch to side-A and testing | |
| 08/06/2021 | Re-activation | NOAA-20 CrIS | Re-activation after the preventive blocklist on 13/05/2021 | |
| 08/06/2021 | Blocklist | AQUA AIRS Channel 1092 | Exclusion of this channel further to recent degradation | |
| 09/06/2021 | Data selection update | in-situ data | Monthly update of in-situ data selection | |
| 10/06/2021 | Land surface data selection update | Surface variables: T2M, RH2M and snow | Monthly update of in-situ LDAS data selection | |
| 23/06/2021 | Activation | HY-2B scatterometer | Activation of HY-2B scatterometer data | |
| 07/07/2021 | Data availability | METOP dual AMVs | METOP dual AMVs AB ceased to be received. | |
| 08/07/2021 | Data selection update | in-situ data | Monthly update of in-situ data selection | |
| 20/07/2021 | New data (monitored) | MISTRAL surface observation | operational extraction to allow monitoring | |
| 22/07/2021 | Technical change | MET8 and MET-11 CSR | Improved observation reporting time (reported time is 15 minutes late causing the system to discard the last slot of the day) | |
| 09/08/2021 | Data selection update | in-situ data | Monthly update of in-situ data selection (includes many MISTRAL stations over Italy and Slovenia SEE-MHEWS-A) | |
| 09/08/2021 | Data selection update | METOP dual AMVs | Activation METOP dual winds CB | |
| 26/08/2021 | Blocklist | Temperature from Chinese AMDAR | Large errors affecting data from Chinese aircraft data | |
| 03/09/2021 | New data | Saildrones | We started the processing and use of a number of saildrones (11 in total). | |
| 09/09/2021 | Data selection update | in-situ data | Monthly update of in-situ data selection. Contains blocklisting of wind from Chinese AMDAR | |
| 09/09/2021 | Land surface data selection update | Surface variables: T2M, RH2M and snow | Monthly update of in-situ data selection | |
| 13/09/2021 | Blocklist | METOP-A IASI | METOP-A IASI permanently excluded. End of life technological tests due to start this week are expected to impact the data content and format | |
| 14/09/2021 | Technical change | GRAS (Metop A/B/C) | GRAS processing update to version 5. Good impact on the quality | |
| 16/09/2021 | New data (monitored) | GPSRO from Sentinel 6A and GRACE-C | Start monitoring of GPSRO from Sentinel 6A and GRACE-C | |
| 21/09/2021 | Technical change | Metop-B AMSUA Ch 6 | Increase of observation errors to temporarily mitigate the ongoing increase of random errors. | |
| 23/09/2021 | Data change | AQUA/AIRS | Bias change affected many AIRS channel due to calibration update. The bias was well handled by VarBC | |
| 01/10/2021 | 11/10/2021 | Outage | HY-2B SCATT | outage of HY-2B SCATT due to an onboard problem |
| 05/10/2021 | 05/10/2021 | Data excluded | Aeolus | Aeolus data exclude due to instrument testing |
| 12/10/2021 | New IFS cycle | All observations | IFS cycle 47R3 implemented. It includes several changes to observations usage: All sky AMSUA, correction of low level high assignment for AMVs, update to radiative transfer model (Implementation of IFS Cycle 47r3) | |
| 14/10/2021 | Data selection update | in-situ data | Monthly update of in-situ data selection | |
| 14/10/2021 | Data selection update | in-situ data | Monthly update of in-situ LDAS data selection. This update contains the exclusion of all MISTRAL snow reports. Many of these snow reports are not correct. | |
| 14/10/2021 | Data excluded from Monitoring | FY-3D GNSSRO | Data excluded from monitoring | |
| 18/10/2021 | 02/11/2021 | Blocklist | Aeolus | Aeolus excluded during testing period |
| 20/10/2021 | New data (monitored) | GNSS RO from SPIRE | Data being distributed by EUMETSAT | |
| 25/10/2021 | New data (monitored) | Strateol2 balloons | Monitoring of data from Strateol2 (https://webstr2.ipsl.polytechnique.fr/#/) | |
28/10/2021 | Blocklist | NOAA-18 AMSU-A Ch 8 | Excluded after steady increase in noise | |
| 08/11/2021 | Data selection update | in-situ data | Monthly update of in-situ data selection | |
| 09/11/2021 | Data selection update | in-situ data | Monthly update of in-situ LDAS data selection.All MISTRAL snow observations remain excluded | |
| 11/11/2021 | End of use | Metop-A: AMV, ASCAT, AMSU-A, MHS, GRAS | Exclusion of these datasets ahead of Metop-A end of life | |
| 11/11/2021 | Blocklist | AIRS channel 1111 | This channel is excluded due to intermittent noise increase | |
16/11/2021 | 26/11/2021 | Outage | FY-3D sensors | Orbital manoeuvre |
| 22/11/2021 | 27/11/2021 | Blocklist | Aeolus | Data excluded during a planned laser test |
| 25/11/2021 | Updated product | Mode-S | Switch to new Mode-S stream (v2.2) from EMADDC | |
| 28/11/2021 | 06/12/2021 | Data excluded temporarily | GOES-16 and GOES-17 CSR | Data excluded due to the implementation of GOES-16 and GOES-17 ABI Enterprise Cloud Mask Level 2+ Algorithm. The data will be tested before will be released in operations. |
| 30/11/2021 | 04/12/2021 | Blocklist | Aeolus | Another period of laser testing |
| 03/12/2021 | New data | HDOB | Activate processing/extraction of High-Density aircraft reconnaissance data (HDOB) | |
| 08/12/2021 | Data selection update | in-situ data | Monthly update of in-situ data selection | |
| 09/12/2021 | Data selection update | in-situ data | Monthly update of in-situ LDAS data selection.All MISTRAL snow observations remain excluded | |
| 14/12/2021 | Technical change | Metop-C MHS | Increase of obs errors for Metop-C MHS channels 3 and 4 after gradual noise increase. | |
| 14/12/2021 | Technical change | NPP CrIS | Start extraction of NPP CrIS to enable use of Long wave channels. Passive for two days then to be activated Data activated on 16/12/2021 | |
| 4/12/2021 | Data change | Ocean SLA (Saral/CryoSat2/Jason3) | SLA processing change from CMEMS |
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