An anomaly occurred on the Copernicus Sentinel-1B Optical Communication Payload, resulting in the loss of three data download links through the European Data Relay Satellite System (EDRS), between 03:26 UTC and 09:48 UTC on 8 February 2019.

SAR acquisitions taken within few hours before this period, as well as during this period, and planned to be downlinked through EDRS, may have been affected.