Patent ID: 7391363

Claim:
A system for augmentation of satellite positioning systems, comprising: a satellite based augmentation system having at least one monitoring ground stations (MGS) for determining a level of error of a satellite (NS) broadcasting positioning signals and at least one navigation computation center ( 2 ), said navigation computation center ( 2 ) providing navigation correction data for transmission, and; a digital satellite system using at least one digital satellite (DS) broadcasting multiplexed data in down-link transmission to a user station (U); characterized in that at least one navigation computation center ( 2 ), is adapted for transmitting, directly or indirectly through intermediate equipment, said navigation correction data to said at least one digital satellite (DS); and said user station (U) has at least one satellite receiver ( 6 ), receiving directly or indirectly through any kind of retransmission said digital satellite signal, and being connected to at least one down-link frame adapter ( 7 ) for demultiplexing and retrieving said navigation correction data from said at least one digital satellite down-link transmission.