Three Sentinel-1 first-generation satellites remained operational after Sentinel-1B was lost to a power issue.
Sentinel-1A launched in 2014 and Sentinel-1B launched in 2016.
Sentinel-1B suffered a technical anomaly in August 2022 that left it unable to acquire data.
The decision to shift Sentinel-1D to Ariane 6 followed Vega-C’s grounding for almost two years after a December 2022 failure and the early retirement of Sentinel-1B after recovery efforts from a late 2021 anomaly failed.
Sentinel-1B was launched in 2016 and ended its mission in August 2022 due to a technical fault.
Sentinel-1C was launched in December 2024 to replace Sentinel-1B.
Sentinel-1B has been successfully de-orbited and will re-enter Earth’s atmosphere within 25 years.
Sentinel-1C replaces Sentinel-1B, which was taken out of service in 2022.
The Sentinel-1 series began with Sentinel-1A, launched in April 2014, followed by Sentinel-1B in 2016.
The anomaly on Sentinel-1B involved the impossibility of recovering the 28V regulated bus of the satellite’s C-band SAR antenna power supply unit, which is needed to provide power to the radar electronics.
Copernicus Sentinel-1B experienced an anomaly on 23 December 2021 related to the instrument electronics power supply provided by the satellite platform that left it unable to deliver radar data.
Copernicus Contributing Mission data, including from European New Space companies, will continue to be used to support the most critical Copernicus Services products affected by Sentinel-1B’s unavailability.
Copernicus Contributing Mission data, including data from European New Space companies, will be used to support critical Copernicus Services products affected by the loss of Sentinel-1B.
Sentinel-1B was launched in April 2016 as the second of two identical Sentinel-1 satellites configured to orbit 180° apart.
Deorbiting of Sentinel-1B will be carried out according to ESA space debris mitigation requirements in place at the time of Sentinel-1A and Sentinel-1B design, with atmospheric re-entry required to take place within 25 years.
Sentinel-1B was launched in April 2016 and operated as the second identical satellite in the Sentinel-1 mission pair.
Copernicus Sentinel-1B experienced an anomaly on 23 December 2021 related to the instrument electronics power supply provided by the satellite platform.
One of the two 28-volt power regulators is needed to operate the Sentinel-1B SAR payload.
Copernicus Contributing Mission data, including data from European New Space companies, will be used to support the most critical Copernicus Services products affected by Sentinel-1B’s permanent unavailability.
Sentinel-1B’s synthetic aperture radar (SAR) payload malfunctioned in December 2021.