Nasa: MMS MISSION

The MMS (Magnetospheric Multiscale) mission is a NASA-led scientific endeavor designed to study the fundamental processes that govern the dynamics of magnetic fields and plasma within the Earth's magnetosphere.

Launched on March 12, 2015, the MMS mission involves a fleet of four identical spacecraft flying in a tight formation within Earth's magnetosphere to capture high-resolution, three-dimensional data of key magnetospheric processes.