Global Navigation Satellite System (GNSS)

GNSS provides geospatial positioning worldwide, usually within several meters, by communicating with satellites.

It encompasses various satellite constellations like

  • GPS (developed by USA)
  • GLONASS (Russia)
  • Galileo (Europe)
  • BeiDou (China)


GNSS and GPS work together, but GNSS-compatible equipment can use navigational satellites from other networks beyond the GPS system, and more satellites means increased receiver accuracy and reliability.

Difference with RTK?

GNSS offers meter-level precision, whereas RTK offers centimeter-level precision.

At WATonomous and MIT-PITT-RW, we have GNSS using the NovAtel.