On December 23, 2021, Copernicus Sentinel-1B skilled an anomaly associated to the instrument electronics energy provide offered by the satellite tv for pc platform, leaving it unable to ship radar knowledge. Spacecraft operators and engineers have been working tirelessly since then to rectify the problem. Sadly, regardless of all concerted efforts, ESA (European Area Company) and the European Fee announce that it’s the finish of the mission for Sentinel-1B. Copernicus Sentinel-1A stays absolutely operational and plans are in power to launch Sentinel-1C as quickly as doable.
ESA’s Director of Earth Remark Packages, Simonetta Cheli, acknowledged, “Sadly, we’ve got to announce the top of the mission for the Copernicus Sentinel-1B satellite tv for pc. The conclusion drawn by the Anomaly Overview Board is that it’s inconceivable to get well the 28V regulated bus of the satellite tv for pc’s C-band artificial aperture radar antenna energy provide unit, which is required to offer energy to the radar electronics.
“Sentinel-1A stays very wholesome in orbit, persevering with to ship high-quality radar photographs for a large number of purposes. Our focus is on fast-tracking the launch of Sentinel-1C. Now, because of the profitable inaugural flight of the Vega-C rocket on July 13, we, with Arianespace, are focusing on the launch within the second quarter of 2023.”
European Fee’s Appearing Director for Area (Directorate Normal for Protection Business and Area), Paraskevi Papantoniou, acknowledged, “The everlasting unavailability of Sentinel-1B satellite tv for pc represents an vital loss for the European Union’s area program and the European Fee is engaged to mitigate its affect. We notably managed to maneuver ahead the launch of Sentinel-1C satellite tv for pc.
“In the meantime, Copernicus Contributing Mission knowledge, together with from European New Area firms, will proceed for use to assist probably the most crucial Copernicus Providers merchandise which are affected. The preparations for the de-orbiting of Sentinel-1B satellite tv for pc are an instance of our joint dedication, for the European Union and ESA, to scrub and accountable area, utilizing the EU’s Area Surveillance and Monitoring capabilities.”
In April 2014, Sentinel-1A was the primary satellite tv for pc to be launched for Copernicus, the Earth remark part of the European Union’s area program. Though the European Union is on the helm of Copernicus, ESA develops, builds, and launches the devoted Sentinel satellites. It additionally operates a few of the missions.
After the Sentinel-1B launch in April 2016, with the mission comprising two equivalent satellites orbiting 180° aside, the mission was in a position to picture the planet with a most repeat frequency of six days, right down to day by day protection at excessive latitudes.
Carrying superior artificial aperture radar know-how to offer an all-weather, day-and-night provide of images of Earth’s floor, the bold Sentinel-1 mission raised the bar for spaceborne radar.
The mission advantages quite a few Copernicus companies and purposes, comparable to people who relate to Arctic sea-ice monitoring, iceberg monitoring, glacier-velocity monitoring, routine sea-ice mapping, surveillance of the marine setting together with oil-spill monitoring and ship detection for maritime safety, in addition to unlawful fisheries monitoring. It’s also used for monitoring floor deformation ensuing from subsidence, earthquakes, and volcanoes, mapping for forest, water, and soil administration, and mapping to assist humanitarian help and disaster conditions.
With such a major function to play and customers counting on well timed knowledge, ESA acted as quickly because it was clear that Sentinel-1B’s energy situation might take some weeks to resolve, which was the hope on the finish of December.
ESA’s Sentinel-1 Mission Supervisor, Pierre Potin, stated, “Along with the European Fee we’re ensuring to bridge a few of the knowledge gaps by adjusting the Sentinel-1A remark plan and thru radar knowledge from different satellite tv for pc missions that contribute to the Copernicus program. For instance, we’re ready to make use of knowledge from Canada’s Radarsat-2 and Radarsat Constellation Mission, Germany’s TerraSAR-X, Italy’s COSMO-SkyMed, and Spain’s PAZ to assist operational sea-ice monitoring for the Copernicus Marine Atmosphere Monitoring Service.
“Whereas we proceed to attempt to decrease inconvenience to customers and push to get Sentinel-1C into orbit as quickly as we are able to, we’re additionally getting ready for the accountable disposal of Sentinel-1B.”
The Sentinel-1 Spacecraft Operations Supervisor, Alistair O’Connell, added, “We have now Sentinel-1B underneath management, all different programs besides the facility affected unit, which prevents the radar from being switched on, proceed to operate nominally and we carry out common monitoring of the spacecraft well being and routine orbit management maneuvers. We are going to hold Sentinel-1B underneath management till we are able to start the disposal course of, which we’ll begin after Sentinel-1C is safely in orbit.
“Deorbiting Sentinel-1B shall be carried out in response to area particles mitigation necessities that had been in place for ESA initiatives on the time of design of Sentinel-1A and Sentinel-1B, which means that re-entry within the environment will happen inside 25 years. In observe, the re-entry length is anticipated to be a lot shorter.”
Copernicus Sentinel-1C encompasses a world premiere of a brand new separation mechanism that can assist keep away from area particles.
A abstract of the outline of the anomaly, of the investigations, and the restoration makes an attempt, in addition to the parallel Sentinel-1 mission degree actions and method ahead is accessible on the Sentinel On-line web site.