Apogee

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

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

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

The angle from the ascending node to the periapsis of the orbit, measured in the orbital plane in the direction of motio...