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The D-RTK GNSS from DJI is a high-precision navigation and positioning system specially designed for use with DJI A3-series flight controllers. Using dynamic differential technology, it provides accurate, centimeter-level 3D positioning. This enhanced accuracy over typical barometer, compass, and GPS systems makes D-RTK useful for commercial, industrial and scientific applications where accuracy is imperative.
RTK-G: Using a GPS+GLONASS dual positioning module, RTK-G is suitable for most countries and regions worldwide.