The SVOM mission was decided following an intergovernmental agreement between France and China, specified in a memorandum of understanding in 2014.
It is a cooperation between the Chinese Space Agency (CNSA), the Chinese Academy of Sciences (CAS), and the French Space Agency (CNES) which manages the development of the French payload (ECLAIRs and MXT instruments), the antenna network (alert system) and the French scientific center.
The launch of the preliminary study phase (Phase B) of the SVOM mission was formalized in 2014. This phase concluded with a preliminary design review (PDR) in July 2016.
The detailed studies phase (Phase C) was launched in January 2017.
The launch of the SVOM mission is scheduled for the end of 2021.