KARMA-7 FG
Antenna pointing mechanism
The KARMA-7 is a state-of-the art space qualified Antenna Pointing System that consists of two main sub-systems, the mechanism with a traditional azimuth over elevation configuration, and the RF system. The RF system consists of the RF feed network (rotary joints and wave guides), and a 22 cm antenna with polarizer.
The mechanism is realised using two identical Small Rotary Actuators (SRA) based on the Kongsberg EuroKARMA drive-line. The mechanism has been developed to accept RF sub-systems with single or dual polarisation in Ka-band.
The development and qualification of the APM was performed under an ESA GSTP. In 2015 KARMA-7 was selected for the MetOp-SG Ka-band data downlink. Each of the 6 MetOp-SG satellites carries two APMs, one nominal and one redundant, for a total delivery to MetOp-SG of 12 Flight Models and one spare.
Two KARMA-7 will be delivered in each of the Copernicus programs for CHIME, ROSE-L and LSTM for a minimum total of 6 Flight Models (3 optional). ROSE-L will be equipped with a dual polarized RF-system. LSTM will be equipped with a larger 30 cm antenna.
Key features
- Long life
- European components
- High TX power capacity
- Low insertion loss
- Full hemispherical coverage
- Optional en stop proximity feedback
- Redundant position sensors and motors
Product range
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