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This is the imagination of the Cheonrian satellite. The first communication satellite ‘Cheonrian 3’ manufactured with national technology will be developed from next year. Provided by the Korea Aerospace Research Institute
The first development project of the ‘Cheonrian 3’ communications satellite carried out with national technology will begin next year with the goal of being launched in 2027. The government will invest 41.82 billion won to develop the Cheonrian 3, a satellite in geostationary orbit that follows al Cheonrian 1 and 2. The Cheonrian 3 is expected to be used for flood disaster monitoring, support for maritime activities, advancement of emergency communications and satellite positioning system (GPS) in disaster areas and quality improvement of communications.
The Ministry of Science and ICT announced on the 29th that it had held in writing the XVIII National Space Commission from the 22nd to the 28th of this month and confirmed the ‘project plan for the development of public geostationary communications satellites’.
This is the first time the launch of a communications-only satellite has been promoted in Korea. So far, the communications satellite has been carried by Cheonrian 1, a geostationary-orbit composite satellite launched in 2010. Cheonrian 1 is not a dedicated communications satellite.
The government will promote the independent development of Cheonrian No. 1, 2A and 2B using the experience and capabilities of Cheonrian No. 1, 2A and 2B. Cheonrian 3 is a geostationary satellite that rises in geostationary orbit to an altitude of 36,000 km, rotates at the same speed as the Earth’s rotation, and operates over the Korean peninsula. The body of the satellite is a 3.5t class and carries three types of communication vehicles. It is developed by applying the electric propulsion system and the receiver of the high performance satellite navigation system (GNSS) used in the Cheonlian 2A and 2B satellites.
Broadband communications carriers, Information Collection Payloads (DCS) and Satellite Navigation Correction Payloads (SBAS), etc., will be developed domestically by receiving advice abroad. The broadband communication payload carried by public communication inherits the Ka-band frequency from Cheonrian 1, which is scheduled to end next year, and uses it for mission performance. The car band is clocked at approximately 27 to 40 gigahertz (GHz) and can be used for fifth-generation (5G) mobile communications and broadband services for high-speed Internet.
Ground systems, like the control station, are developed independently in Korea, and some parts, like antennas, are developed jointly with other countries.
The development project passed a preliminary feasibility study in June this year. The total budget required is 411.82 billion won, with 259.9 billion won from the Ministry of Science and ICT, 48.34 billion won from the Maritime Police Agency, 50.2 billion won from the Ministry of the Environment, and 53.32 billion won. won from the Ministry of Land, Infrastructure and Transportation.
In addition to the three types of communication payloads, Cheonrian 3 will be equipped with various equipment. Provided by the Ministry of Science and Technology Information and Communication
The organization in charge of the project is scheduled to open in January and select it in March. The development of the satellite system and main body is in charge of the Korea Aerospace Research Institute, and the Korea Electronics and Telecommunications Institute (ETRI) develops a communication payload to load onto the satellite. The Ministry of Science and ICT announced a policy to support the industrial workforce from the design to the development of satellites to ensure technological capabilities when a government-funded research institute is selected as a commercial operator.
The government plans to use the Cheonrian 3 in various fields, such as flood disaster monitoring, maritime activities support, disaster response support and security, such as emergency communication in disaster areas, signaling of GPS position correction and the role of future satellite communications technology test benches. The Ministry of the Environment uses satellites to monitor mountains, rivers, dams and rivers in real time and to manage floodgates. The maritime police use satellites for the operation of the security ship’s information system and for maritime defense and search and rescue.
The Ministry of Land, Infrastructure and Transport uses the SBAS payload for the ‘Korean Precision GPS Positioning System (KASS)’ which is currently being built. KASS aims to reduce the GPS error from the current 17-37 m to 1-3 m. The Ministry of Science and ICT plans to develop technologies related to land mobile communication and satellite communication, such as fifth generation mobile communication (5G), and to use the satellite for tests to verify new technologies and new service possibilities developed by the national satellite communications industry.
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