[GPS]
A satellite constellation that provides independent geopositioning data. China's BeiDou Navigation Satellite System, the European Union's Galileo, Russia's GLONASS, and the United States' GPS are a combined global navigation satellite system (GNSS). India's NavIC is a regional navigation satellite system (RNSS). Japan's QZSS is both a RNSS and a satellite-based augmentation system (SBAS), designed to enhance the accuracy of GNSS.