| Start date | End date (short events) | Event type | Affected data | Description |
|---|---|---|---|---|
| 16/01/2024 | Data activation | NOAA-21 CrIS | ||
| 18/01/2024 | Data cessation | PlanetIQ GNSS-RO | ECMWF stopped receiving the data following NOAA's decision to award the contract to SPIRE | |
| 24/01/2024 | Data activation | SPIRE GNSS-RO | SPIRE data provided by NOAA activated after a short health check period | |
| 24/01/2024 | New data | SYNOP Converted from METAR over USA | Significant increase of observations from USA due to the conversion of METARs to SYNOPs | |
| 06/02/2024 | Data activation | Sentinel 3A/3B/6A, Cryosat-2 and SARAL | Wave height data from these satellites started to be used | |
| 07/02/2024 | Data blocklist | Metop-B GOME-2 | Following a notification from EUMETSAT about issues in the processing | |
| 07/02/2024 | Data selection update | In-situ observations | In-situ observations used in 4DVAR and Land data assimilation | |
| 22/02/2024 | 12/03/2024 | Outage | SMOS | Outage of SMOS due to on-board anomaly |
| 13/03/2024 | Metadata update | METAR | Update of METAR ICAO list | |
| 08/05/2024 | Data selection update | In-situ observations | In-situ observations used in 4DVAR and LDAS (The implementation caused technical issues) | |
| 15/05/2024 | Data selection update | In-situ observations | Fix an issue with the implementation of the data selection (on 08/05/2024) which led to accidental activation of many datasets (Z from radiosondes, All TEMP descent radiosondes and other datasets) | |
| 05/06/2024 | Technical change | Dropsondes | Change to reduce the number of dropsonde data points used, especially when many drops have been made near a TC. Dropsondes are intermittent and any effect on headline scores will be small | |
| 27/06/2024 | New data monitored | HY-2 scattermoeter | passively monitoring of HY-2C and HY-2D scatterometer wind products | |
| 16/07/2024 | Data blocklist | Metop-C AMSUA Channel 8 | Blocklist Metop-C AMSUA Channel 8 due to a steady increase of the noise | |
| 16/07/2024 | Data blocklist | Metop-C AMSUA Channel 5-7 over sea-ice or snow covered land | Metop-C AMSUA Channel 5-7 over sea-ice or snow covered land | |
| 26/08/2024 | New data | Dropsondes | Acquisition update to acquire Dropsondes from PERCUSION campaign (https://community.wmo.int/en/news/operational-newsletter-2024) | |
| 29/08/2024 | New data monitored | NOAA-21 VIIRS AMVs | Passive monitoring of NOAA-21 VIIRS AMVs | |
| 08/10/2024 | New data activation | SNOTEL snow data | SNOTEL snow depth is actively used |
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