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

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Advantages<br />

Simplicity and reliability (monopropellant)<br />

- 29-<br />

Lowest cost propulsion system (other than cold gas)<br />

Space s<strong>to</strong>rable for long periods (> 12 years demonstrated)<br />

Low thrust capability<br />

Moderate thrust levels available (≤ 400 N)<br />

Disadvantages<br />

Moderate Isp (≤ 2300 Ns/kg) with moderate Issp (< 1900 Ns/kg) resulting in medium/high<br />

system mass<br />

Limited life of catalyst<br />

Satellite outer surface contamination (NH3) moderate

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