P inertial unit redundancy comprising a housing 14 of the implantation of inertial sensors 17, each provided with a loop of equalization and of a loop of proportionality. A programmable digital electronic circuit 10 is connected to each of the outputs of the loops of proportionality by a data channel 13. / p & & p & the electronic circuit 10 is also connected by a data channel outside of the optical detectors 12. The switches make it possible to put into operation or when one or more detectors, in particular in the event of failure. Application to the satellites. / p
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