A Very High Performance FOG Inertial Measurement Unit for Accuracy demanding Satellites
The Fiber Optic Gyro (FOG) is a fully static inertial measurement technology that is free of any moving part and have a much better reliability than classical mechanical gyroscope technologies.
Astrix 200 is made of 4 independent closed loop FOG 200 gyroscope channels, assembled on a common baseplate and of a separated electronics.
This configuration offers a redundancy and a failure detection capability. It improves also the nominal performances, by using 4 channels ON at the beginning of the mission (then 3 channels ON after one failure).
The 4 sensing fiber optic coils are skewed and mounted in a tetrahedral Inertial Core Unit (ICU), deported from the associated Gyro Electronic Unit (GEU ).
This 4-axis configuration improves the nominal performances by using 4 channels ON at the beginning of the mission (then 3 channels ON after one failure).
Earth observation satellite, accurate scientific satellite