Overview of Technique Aspects in Relay Satellite System
Yuan Gao, Hong Ao, Quan Zhou, Weigui Jair Zhou, Yi Li · Advances in intelligent systems research/Advances in Intelligent Systems Research · 2016
Data relay satellites as an important part of space-based communication systems, greatly improving the user's satellite coverage, reducing the number of ground stations cloth, cost savings, and is one of the major space-faring countries focused on building space systems.Currently, the United States, Russia, Europe and Japan have developed their own data relay satellite system in space and terrestrial systems to upgrade at the same time, a small satellite constellation, equipped with flexible form loads like laser communications, software radio, networking and other advanced technology development and deployment of next generation active satellite systems, and planning to build a relay across the solar system with planets satellite relay satellite. Development of Data Relay Satellite in Main CountriesStatus of USA.American TDRSS system, also known as space-based network, the monitoring network is one of the three NASA (National Aeronautics and Space Administration, NASA), mainly for the United States military and civilian LEO satellites, the International Space Station, research aircraft and balloons, carrying rockets and other users with S, Ku, Ka-band monitoring and control information and business data relay.By the end of 2014, the United States has a total of 11 launch third generation TDRS satellites in orbit serving has 9, two sites in the construction of three ground terminal station, consisting of a complete satellite system.According to NASA "Space Communications and Navigation" (Space Communications and Navigation, SCaN) plan [1], the main task facing the recent demand for space-based network communication is reliable unmanned lunar probes require high-speed data transmission and manned missions needed, high-speed backbone link, nearly continuous coverage and seamless support for user tasks.Therefore, TDRSS construction of key recent years are: launch the third generation of satellites; use of 30 years of ground system updates and upgrades; New Blossom [2] ground station to meet future aerospace needs protection.SGSS plan also includes the establishment of Maryland Blossom corner a new terminal station, east extended coverage of space-based network, to provide launch support for the expendable launch vehicle, known as the Space Network Expansion terminal station, the station will be built two main tasks and configure new ground antenna communications electronics.SGSS innovation system is a "pool" structure to manage the device.The current space-based network ground terminal station a "chimney" structure, the signal is sent to a particular series of devices through TDRS satellites.Although the device has redundant, but you cannot switch to another TDRS satellites to support users.This structure limits the flexibility to increase the number of devices on each end of the ground, because every single TDRS satellite itself needs a master / standby ground equipment.The SGSS system uses the "pool" structure, and every single TDRS satellite dedicated little device, the user can choose to protect equipment from the free pool of resources, returned to the pool after performing the task for the next use, each ground terminal station can using the same pool."Pool" type structure