Magnetospheric Multiscale mission, or MMS, developed by NASA, gives scientists new insight into Earths magnetosphere. MMS holds the Guinness World Record for highest altitude fix of a GPS signal. The MMS satellites set the record at 70,006.4 kilometres above the surface.
The four MMS spacecraft incorporate GPS measurements into their precise tracking systems, which require extremely sensitive position and orbit calculations to guide tight flying formations.
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Earlier this year, MMS achieved the closest flying separation of a multi-spacecraft formation with only about seven kilometres between the four satellites.
The mission uses four individual satellites that fly in a pyramid formation to map magnetic reconnection. This may help in understanding phenomena around the universe from auroras on Earth, to flares on the surface of the sun, and even to areas surrounding black holes.
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