Anomaly detection techniques using multi-reference station for network RTK integrity monitoring

Abstract

Network RTK is a precise positioning technique that uses carrier phase correction data from multi-reference station, and is constantly being researched for improved accuracy. However, insufficient researches on network RTK integrity monitoring have been conducted, because network RTK has been mainly used on surveying for static or kinematic positioning. Recently, network RTK is being spotlighted as an attractive technique for dynamic navigation users requiring high quality positioning performance, as well as surveying. Thus, researches for network RTK integrity monitoring are considered to be absolutely necessary. This paper presents an integrity monitoring techniques adequate to network RTK. Anomaly detection techniques are proposed, to isolate an abnormal signal caused by an anomalous satellite system, or an irregular ionosphere or troposphere characteristics between reference stations within the network's coverage. The NeRIM system is presented for network RTK integrity monitoring.