FIELD: radio engineering, communication.
SUBSTANCE: monitoring system (1) has at least one monitoring satellite (S2) lying on an orbit (O2) at a lower height than satellites (S1) in the group (2) of satellites so as to be able to receive positioning signals emitted towards the Earth (T) by said satellites (S1), and has a processing unit (11) for checking integrity of said received positioning signals using position information which is separated from said signals for this purpose.
EFFECT: providing users with information relating to quality of positioning signals by checking integrity of the monitored positioning system without local errors of positioning signals from monitoring stations.
10 cl, 5 dwg
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