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S.1 Spacecraft Propulsion Systems Chapter 1: Introduction to ...

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Orbit Maintenance or “Station Keeping”:<br />

- 6-<br />

- Keeping a spacecraft in the desired mission orbit, i.e. compensating for effects of<br />

disturbing forces like drag, solar wind, gravitational forces, etc.<br />

Attitude control<br />

Changing the attitude, that is changing the orientation of a spacecraft <strong>to</strong> the desired<br />

direction.<br />

Keeping a spacecraft <strong>to</strong> the desired direction by compensating for disturbing <strong>to</strong>rques.

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