<P> Real Time Kinematic (RTK) positioning is a satellite navigation technique used to enhance the precision of position data derived from satellite - based positioning systems (global navigation satellite systems, GNSS) such as GPS, GLONASS, Galileo, and BeiDou . It uses measurements of the phase of the signal's carrier wave in addition to the information content of the signal, and relies on a single reference station or interpolated virtual station to provide real - time corrections, providing up to centimetre - level accuracy . With reference to GPS in particular, the system is commonly referred to as Carrier - Phase Enhancement, or CPGPS . It has applications in land survey, hydrographic survey, and in consumer unmanned aerial vehicle navigation . </P> <P> The distance between a satellite navigation receiver and a satellite can be calculated from the time it takes for a signal to travel from the satellite to the receiver . To calculate the delay, the receiver must align a pseudorandom binary sequence contained in the signal to an internally generated pseudorandom binary sequence . Since the satellite signal takes time to reach the receiver, the satellite's sequence is delayed in relation to the receiver's sequence . By increasingly delaying the receiver's sequence, the two sequences are eventually aligned . </P>

What is the difference between rtk and static gps
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