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BeiDou Navigation Satellite System
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[aerospace, remote sensing]
Also known by the acronym BDS. A global geopositioning satellite constellation used for positioning, navigation, and timing (PNT). Operated by the Chinese government, it is part of the international GNSS constellations spread between several orbital planes.
There is also a satellite-based augmentation system (SBAS) aspect of BDS that monitors and provides correction data to improve GNSS precision over Chinese airspace.