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Which system is capable of measuring on the ground, the signal errors transmitted by GNSS satellites and transmitting differential corrections and integrity messages to navigation satellites?
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Satellite-based augmentation systems (SBAS)

SBAS operates on the principle of sending navigation correction information to satellites, based on actual measurements of signal errors on the ground. The signals transmitted by the GNSS satellite constellation are transferred to a central computing centre and monitored by ground station, and integrity is assessed. Differential corrections are then transmitted as part of integrity messages within the navigation messages

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