초록 ▼

A navigation and mobile communication satellite system including a Geo-Mobile (GEM) satellite (14) and a plurality of Global Position System (GPS) satellites (50). The GEM satellite (14) is in operative communication with at least one ground segment (12) and at least one user segment (16), and inclu

A navigation and mobile communication satellite system including a Geo-Mobile (GEM) satellite (14) and a plurality of Global Position System (GPS) satellites (50). The GEM satellite (14) is in operative communication with at least one ground segment (12) and at least one user segment (16), and includes a GEM processor for providing communication services to the user segments (16). The GPS network is also in operative communication with at least one of the user segments (16) and at least one of the ground segments (12). The GPS network provides navigation data to the user segment (16). Each of the ground segments (12) include a gateway station (28) for receiving the navigation data and uplinking the navigation data to the GEM satellite (14) such that the navigation data is rebroadcast to the user segments (16) at a higher power than from the GPS network alone. In this manner, the GEM system provides a navigation signal at a much higher power than the present GPS system. This signal is of sufficient strength to overcome the effects of a lower power signal jammer, which may be effective against the weaker GPS signal.

대표청구항 ▼

[ What is claimed is:] [1.]1. A navigation and mobile communication satellite system (10) comprising:a Geo-Mobile (GEM) satellite (14) in operative communication with at least one ground segment (12) and at least one user segment (16), the GEM satellite (14) including a GEM processor (100) for provi

[ What is claimed is:] [1.]1. A navigation and mobile communication satellite system (10) comprising:a Geo-Mobile (GEM) satellite (14) in operative communication with at least one ground segment (12) and at least one user segment (16), the GEM satellite (14) including a GEM processor (100) for providing communication and navigation services to said user segments (16);a plurality of Global Position System (GPS) satellites (50) in operative communication with at least one of said user segments (16) and at least one of said ground segments (12), said GPS satellites (50) providing wide band, high data rate navigation signals containing navigation data to said user segment (16) and said ground segment (12);wherein each of said ground segments (12) include a gateway station (28) for receiving and formatting said wide band, high data rate navigation signals into a GEM processor format and uplinking said navigation data to said GEM satellite (14) such that said navigation processed signals are rebroadcast from said GEM satellite (14) to said user segment (16) at a higher power than from said GPS satellites (50).