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Definition

Apogee

The point in an orbit farthest from the central body. For Earth orbits, the highest altitude above Earth's surface.

Related terms

Attitude Control SystemACS

The subsystem responsible for maintaining and changing the orientation of a spacecraft. Includes sensors (star trackers,...

Bus

The structural and functional core of a spacecraft that houses and supports the payload and all subsystems. Includes pow...

Budget (Mass/Power/Link)

An accounting of resource allocation across spacecraft subsystems with margins. Mass budgets track weight, power budgets...

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