Space Segment -- Transmission Techniques -- Antenna Systems for Mobile Satellite Applications -- Propagation and Interference Consideration -- Inmarsat GEO GMSC System -- Cospas-Sarsat LEO and GEO GMSC Systems -- Non-GEO GMSC Systems -- Global Satellite Augmentation Systems (GSAS) -- Global Stratospheric Platform Systems (GSPS).Global mobile satellite communications (GMSC) are specific satellit…