Application of Radio Technology in the New Era (1)
In recent years, more than 43 kinds of radio services classified by ITU have been widely used in my country's communications, radio and television, railway, transportation, aviation, aerospace, meteorology, fishery, scientific research, and other industries and fields, effectively promoting economic and social development. process.
Communication field
In the field of communication, from public mobile communication (including 2G, 3G, and 4G), trunking communication to broadband wireless access, short-range radio communication, and satellite communication, radio technology has been the most widely used in the field of communication. At present, the number of mobile phone users in my country has exceeded 1.1 billion, and China has become the country with the largest mobile communication network and the largest number of users in the world. The universally popularized public mobile communication has become the leading force in promoting the development of my country's information and communication industry, creating huge economic and social benefits.
Radio and television field
In the field of radio and television, the radio and television industry use radio technology to spread the voice of the party and the government and enrich the cultural life of the masses. After decades of development, my country has built the world's largest radio and television network. Radio broadcasting has developed in an all-around way from the initial short-wave broadcasting to short-wave, medium-wave, FM broadcasting, TV broadcasting, and satellite TV broadcasting. At present, more than one-half of households in the country watch TV programs through wireless TV networks. By 2012, the national comprehensive population coverage of radio and television reached 97.06% and 97.82% respectively.
Meteorological field
In the field of meteorology, radio and television departments use radio technology to achieve satellite telemetry, remote sensing, and information transmission. Through unremitting efforts, my country has built a three-dimensional integrated meteorological monitoring business system based on meteorological satellites as space-based, radiosondes as space-based, and weather radar stations as ground-based. Meteorological departments can monitor global weather changes, climate change, environmental changes, changes in water resources, and the occurrence and development of disasters. At present, China has more than 300 meteorological radars and 7 meteorological satellites, ranking among the top in the world. China is one of the countries with the most accurate weather forecast in the world.
Aviation sector
In the field of aviation, radio technology has played a very crucial role in aviation navigation, communication, surveillance, and meteorology. Aeronautical radio navigation can provide accurate bearing, distance, and position information for aircraft. Aviation radio communication can realize dispatch command and ground-air communication in the airport; aviation radio surveillance can accurately determine important data such as the position and speed of the aircraft. The aviation meteorological system undertakes the task of meteorological services for airports and air routes. At present, my country's civil aviation has more than 180 airports, more than 2,290 scheduled flight routes, and more than 1,760 aircraft. The total transportation turnover ranks among the top in the world.
