Service charge

SBAS pilot service scheduled for December for safe aircraft flight with fixed GPS signals

[Courtesy of the Ministry of Land, Infrastructure and Transport]

SEOUL – South Korea will provide pilot service for the safe flight of aircraft by correcting GPS errors in real time likely in December 2022 using the first dedicated satellite for its Independent Satellite-Based Augmentation System (SBAS) . It is an international standard system that provides accurate location information via satellite.

The Malaysian communication satellite MEASAT-3d has been leased for 15 years. The European heavy space launcher Ariane 5 carrying the MEASAT-3d satellite equipped with a transponder for the South Korean SBAS service will be launched from a space center in French Guiana in June, according to the Ministry of Land, Infrastructure and Transport.

As GPS signals descend to Earth from space, layers of the atmosphere refract and slightly delay the signals, interfering with distance solutions from the ground-based GPS receiver to the satellite, resulting in position errors of several meters. The performance of global navigation satellite systems such as GPS can be enhanced by SBAS. Using measurements from ground stations, correction messages are created and sent to one or more satellites for broadcast to end users as differential signals.

SBAS is essential for applications where accuracy and integrity are essential. In the aviation sector, GPS does not meet the strict operational requirements set by the International Civil Aviation Organization (ICAO) for use in such critical stages of flight as final approaches. With the addition of SBAS, ICAO standards are met.

South Korea is the seventh country to join an ICAO campaign for the spread of SBAS by developing the Korean Augmentation Satellite System (KASS), following the United States, European Union, India, Japan, Russia and China. A roadmap, presented at a meeting of government officials and experts from state research organizations, universities and Korean Air on April 28, calls for a pilot SBAS service starting in December 2022. Full service is due to start in late 2023 after system security and reliability. are checked.

The ministry aims to launch a second satellite in 2025 and the third in 2027. “We will do our utmost to make final preparations for the successful launch of the first satellite and to upgrade KASS and leapfrog as a powerhouse. aeronautics in the future,” Joo Jong-wan, a ministry official responsible for airport policy, said in a statement.

Since 2014, some 128 billion won ($101 million) has been invested in setting up ground infrastructure including seven reference stations, two satellite communication stations and two integrated operating stations, the ministry said, adding that tests have been carried out in the country and in France.

South Korea will try to locate the core technologies and launch more satellites for the implementation of the Korean Positioning System (KPS) by 2035. SBAS and KPS can be applied to autonomous driving, vehicles unmanned aircraft, precision maritime operations and precision missile strikes.

KPS is based on seven satellites that can provide independent positioning and navigation signals over an area spanning a radius of 1,000 km around Seoul. The goal is to prove an ultra-accurate location data service and reduce the range of positioning error in its service area to less than one meter. The KPS is essential for national security and the development of new technologies such as personal air vehicles and air taxis. In June 2021, the United States agreed to provide assistance for the development of the KPS.

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