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reaction control system (RCS)
A type of attitude control system that uses small, low-thrust vernier engines to provide three-axis control of a spacecraft in the absence of aerodynamic forces. Most RCS systems employ a cold gas such as nitrogen, although some operate using hydrazine. Pointing accuracies of 0.1-0.5° are typically achieved.
Related categories
• ROCKET ENGINE TYPES
• SPACECRAFT NAVIGATION AND CONTROL
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