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Program: MMS

Magnetospheric MultiScale

United States scientific program to examine magnetic reconnection. 4 identical satellites launched at the same time and to be placed in a tetrahedral formation.

The mission will provide the first 3 dimensional views of reconnection occurring in Earth's protective magnetic space environment, the magnetosphere. Magnetic reconnection occurs when magnetic fields connect, disconnect, and reconfigure explosively, releasing bursts of energy that can reach the order of billions of megatons of TNT. These explosions can send particles surging through space near the speed of light.

External resources


Technical data


Prime contractor NASA GSFC
Platform NASA SwRI
Mass at launch 1250 kg
Dry mass 900 kg
Dimension octogonal 3.5m wide, 1.2m high
Solar array  
Stabilization spin stabilized
DC power  
Design lifetime 2.5 years

8 deployable wire booms of 112m
S-band communication

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