Company : Comat


Innovative antenna pointing mechanism, developed in collaboration with the French Space Agency (CNES).

This equipment is intended for X band telemetry dowlink to be flown onboard the next generations of Earth Observation satellites.

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

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Key Features

  • The Tripod orients a Ø 220 mm high-gain parabolic X band antenna
  • Precision: 1° (worst case)
  • Maximum pointing speed in tracking mode: 5°/s
  • Pointing domain: +/- 74° elevation, 360° infinite azimuth rotation
  • Initialization time: < 15 s
  • Station transition time: 8 s (average), 25 s (worst case)
  • Lifetime on low Earth orbit: 10 years
  • Data rate: 2 Gbps with low insertion loss (< 1.5 dB @ pointing system level)

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