气象部门卫星通信专用网计划设想

A Scheme for the Satellite Communication Network in Meteorological Services of China

To raise the efficiency of the meteorological services system and to keep the pace with scientific-technical advancement of the world,a VSAT-based satellite communication network is required. This operational and technical network should meet the requirement of meteorological data transmission and could be used to have all the LANs of Meteorological Services interconnected so that data resources could be shared via this network.One of the important ideas on the design is the selection of the frequencies used by the network. Ku band is considered to be suitable for the meteorological agencies those locate in urban areas, because the band is less influenced by the terrestrial microwave. The topology of network is combined by star and mesh networking to meet the requriements of data transmission and distributed processing and to provide with the flexibility for voice communication and data exchange, multi-address mode also plays an important role for higher network efficiency. A-ALOHA mode is a more advanced technique, which could be adapted for better meteorological information transmission.