CERES (CapacitÉ de Renseignement Électromagnétique Spatiale) is a French space-based electronic surveillance constellation designed to collect intelligence of electromagnetic origins anywhere in the world.

Launched in November 2021, the satellites are expected to reach their final orbit, 700 km from Earth, after a few months and full operational capability by the end of 2022.

Their purpose is to allow France to gather data that was previously inaccessible from land, sea, or airborne sensors, and for the French military to more quickly and effectively adapt to new operational scenarios.

An all-weather system operational 24/7, the CERES constellation is notably capable of tracking, identifying and mapping enemy radars, air defenses and command centers.

[2] The CERES will replace the ELISA demonstrator, a cluster of four satellites that were deorbited in the summer of 2021 after ten years of service.