Development of satellite mobile communication

From 65438 to 0976, Marist (Maritime Satellite Mobile Communication System), the world's first mobile satellite communication system, began commercial operation, providing telephone and telegraph services. INMARSAT (International Maritime Satellite Organization) was established in 1979. Starting from 1982, it rented seven satellites to form the first generation INMARSAT satellite communication system, providing global satellite mobile communication services for ships. Through communication

With the growth of business volume, four second-generation INMARSAT satellites were launched from 1990 to 1994. In addition, in 1992, Australia uses AUSSAT-B satellite to provide domestic satellite mobile communication services. Canada and the United States jointly established the North American Mobile Service Satellite Communication System (MAST) to provide services for mobile users on land, sea and air, and launched two MAST satellites on 1994 and 1995 respectively. Since 1990, many companies have put forward the schemes of multi-satellite (constellation) mobile communication system in low and medium orbit, mainly including iridium satellite system, global satellite system and ICO system. Among them, Iridium system was put into production on 1999 and declared bankrupt due to poor management. The global satellite system was put into operation in 2000.