Study on reducing GNSS temporal and spatial decorrelation error using Compact Network RTK

This paper suggests a method combining Compact RTK (Real Time Kinematic) and Reference Station (RS) networking technique, and shows this method can reduce both temporal and spatial decorrelation error. Compact RTKs compatibility with all the conventional Network RTK methods, i.e. Master-Auxiliary concept (MAC), Virtual Reference Stations (VRS), and Flachen-korrektur-parameter (FKP), is examined theoretically in this paper. To prove that the Compact RTK is not only valid, but also helpful to the Network RTK system, we construct a field test using 1 hour rinex data logged every second from CORS RS. No matter which network RTK method may be applied, Compact Network RTK resolves the ambiguity of the carrier phase in 10-40 seconds and determines the position with 6~7cm horizontal and 7~8cm vertical error (95%) in the 100 by 100 km region. Moreover, the Compact Network RTK enables Network RTK service providers to reduce a datalink bandwidth for correction message to 5~700bps from several thousand bps, currently 9600bps of GPRS/GSM, without a severe degradation of accuracy.