satelliidipõhine tugisüsteem, mis parandab positsioneerimise täpsust geostatsionaarse satelliidi kattealas
a wide coverage augmentation system in which the user receives augmentation information from a satellite-based transmitter
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Valdkond ICAO lisade põhjal loodud klassifikaatori järgi: Lennundusside (telekommunikatsioon)
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Several countries have implemented their own satellite-based augmentation system. Europe has the European Geostationary Navigation Overlay Service (EGNOS) which covers the EU and possibly beyond. The USA has its Wide Area Augmentation System (WAAS). Japan is covered by its Multi-functional Satellite Augmentation System (MSAS). India has launched its own SBAS programme named GPS and GEO Augmented Navigation (GAGAN) to cover the Indian subcontinent. Both Korea (2013) and China (2014) have announced plans to start their own SBAS implementation.
Satellite-based augmentation systems (SBAS), such as EGNOS, complement existing global navigation satellite systems (GNSS). SBAS compensate for certain disadvantages of GNSS in terms of accuracy, integrity, continuity and availability.
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