Abstract :
Both the technological feasibility of inclined orbit satellite communication systems and the specification of the terrestrial pan-European cellular radio system as recommended by the CEPT Groupe Special Mobile (GSM), form the basis for the digital mobile satellite system LOOPUS MobD, the architecture of which is outlined. Satellites active in their northern orbital arcs allow in Europe for high elevation angles and open new opportunities to increase substantially the frequency spectrum available to mobile satellite services. The acceptance of essential GSM parameters in the supplementary satellite networks facilitates the integration of both. The chosen orbit constellation suggests a common satellite system for land, aeronautical and maritime mobiles in the northern hemisphere
