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AVUM

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Status: In production. Thrust: 2.45 kN (551 lbf). Gross mass: 650 kg (1,430 lb). Unfuelled mass: 150 kg (330 lb). Specific impulse: 315 s. Burn time: 317 s. Height: 1.74 m (5.70 ft). Diameter: 1.90 m (6.20 ft). Span: 1.90 m (6.20 ft).

The AVUM upper stage performed the following functions:

• roll control during second, third and fourth stage flights
• attitude control during coasting phase
• correction of axial velocity error due to solid rocket motor
• performance scatter
• generation of the required velocity change for orbit circularization
• satellite pointing
• payload(s) release maneuvers

The AVUM avionics module provided the following services:

• flight control and mission management
• telemetry
• localization and neutralization
• power supply and distribution