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Single Point Ground
in NASA
Signal Point Ground
in NASA
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Similar to SPG
2IC - Second In Command
2M - Micro Miniature
2MASS - Two Micron All-Sky Survey
2STO - Two Stage To Orbit
3-DOF - Three Degree Of Freedom
3AAL - Three Axis Acoustic Levitator
6-DOF - Six Degree Of Freedom
View all in NASA