3POD

Telecommunication & Observation

Mechanism

Comat has developed an innovative antenna-pointing mechanism, in collaboration with the French Space Agency (CNES).

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3POD

telecommunications-et-observations

- Mechanism

Image 3POD
Image espace

CONTEXT

This equipment is intended for X band telemetry downlink to be flown onboard next generations of Earth Observation satellites. The Tripod orients a Ø220 mm high-gain parabolic X-band antenna.

Main benefits

  • A unique parallel architecture offering 3 degrees of freedom (Azimuth, Site, Zoom)
  • Excellent agility for antenna-pointing applications
  • Infinite azimuth turns
  • Dual polarization through 2 RF cables, without slip rings
  • Very low jitter thanks to a reduced mobile mass (since the 3 actuators remain stationary on the baseplate)
  • Easy-to-use central hold down & release system
  • ITAR-free
  • Compliant with ECSS standards.

Key
features

Power Consumption

5 W

Holding Torque Unpowered

1.2 N.m

Step/Revolution

10.800

Output Torque

6 N.m

Total Assembly Weight

1.17 kg

Harmonic Drive Ratio

30

Motor Step Angle

Holding Torque Powered

16 N.m

Output Step Angle

0.033°

Max Output Step

12°/s

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