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Hybrid Satellite Position Estimator Using Self-Induced Dither for SATCOM on the Move

Abstract : The only way to insure a good satellite communication data rate on a moving vehicle is to maintain an antenna bore-sight in the satellite direction. To do so, the antenna is mounted on an Antenna Positioning Systems(APS). The APS is a motorized gimbals that make the antenna move in order to maintain a proper pointing, regardless the vehicle movements. This kind of satellite communication is called SATCOM On The Move (SOTM). In this paper, an hybrid pointing strategy, using least squares identification and gyroscopes is proposed and tested through realistic simulation. The main difference with other strategies is that the scanning is made using only the motion due to measurement noise and gyroscope drift, making unnecessary the introduction of a pointing dither on purpose, as it is usually done. Such a dither is referred as self-induced dither. The main advantage of this strategy is its robustness with respect to non-linearities due to mechanical faults since no precise dither trajectory has to be followed. Another benefit is that attitude measurements are not used during tracking, making the strategy proposed especially interesting for low cost applications.
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  • HAL Id : hal-01929571, version 1

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Elliot Broussard, Minh Tu Pham, Maxime Ladevez, Xavier Brun, Benoît Vion. Hybrid Satellite Position Estimator Using Self-Induced Dither for SATCOM on the Move. 20th IFAC World Congress, Jul 2017, Toulouse, France. pp.7208-7212. ⟨hal-01929571⟩

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