Collision avoidance manoeuvres were executed on Copernicus Sentinel-1A to reduce the risk of collision with a debris, potentially occurring at 23:08 UTC on 4 January 2019.

Two Copernicus Sentinel-1 data download links through the European Data Relay Satellite System (EDRS) had to be cancelled due to these orbit manoeuvres.

SAR acquisitions taken within few hours before and after this event, and planned to be downlinked through EDRS, may have been affected.