Application of Radio Technology in the New Era (2)
Aerospace
In the aerospace field, radio technology supports key applications such as remote control, telemetry, remote sensing, and ultra-long-range information transmission. China is one of the few countries in the world that has the technology to manufacture and launch space launchers such as artificial earth satellites and spacecraft. In recent years, the launch of the "Shenzhou" series of manned spacecraft, the launch of lunar exploration satellites, and the docking of Shenjiu and Tiangong-1 have made China's aerospace industry continue to take new steps.
Nautical field
In the field of navigation, radio technology has been widely used in ship-shore communication, radar navigation, global positioning, etc., effectively ensuring the safety of navigation. In fact, in the early days of its birth, radio technology was the earliest and most widely used in the fields of marine communication and ship-to-shore communication. At present, my country has basically established a comprehensive communication system based on the national marine fishery safety communication network as a platform, which integrates traditional short-wave and ultra-short-wave communications, satellite, and mobile communications, etc., to effectively ensure the safety of fishery production.
Railway field
In the field of railways, radio technology plays a vital role in train dispatch communication, automatic identification of vehicle numbers, and train operation control. In recent years, the development of high-speed railways is inseparable from the support of radio technologies such as GSM-R. GSM-R can provide wireless train dispatching, marshaling and shunting communication, emergency communication, maintenance, and maintenance communication for high-speed rail, which can meet the wireless communication requirements of trains in a high-speed running state, and effectively guarantee the operation safety of high-speed rail.
Transportation
In the field of transportation, with the continuous development of road and water transportation, the application of radio technology is becoming more and more extensive. In terms of road traffic, radio applications including non-stop toll collection (ETC), GPS navigation, radar flow monitoring, and traffic information collection systems make vehicles safer and smoother. In terms of water transportation, the application of ship-shore communication, GPS navigation, international maritime satellite communication, and other means can effectively ensure the safety of navigation of ships on the water, and provide protection for ships in distress, such as search and rescue.
Security field
In major sports events and major events such as the Beijing Olympics, the 60th anniversary of the National Day, and the Shanghai World Expo, radio technology has been widely used in television broadcasting, command and dispatch, security, and other aspects, playing a very important role. In public emergencies such as the Wenchuan earthquake in Sichuan, amateur radio, short-wave communications, and emergency communications have become bridges and links between the disaster area and the outside world. In the field of public safety, the application of wireless video surveillance, emergency communication, and other technologies has become an effective means for government departments to respond to emergencies and maintain social stability.
Defense field
In the field of national defense, in recent years, with the continuous advancement of global military reforms, the speed of the evolution of the war form from the original mechanization to the informatization is getting faster and faster. The normal operation of military communication, command and control, early warning and detection, intelligence reconnaissance, navigation and positioning, and weapon guidance systems all depend on the safe use of radio spectrum resources. Today, the ability to effectively control radio spectrum resources and the electromagnetic environment has become an important factor in building an information-based army and winning information-based warfare.
