Towards The Inclusion Of Galileo And Beidou/Compass Satellites In Trimble Centerpoint Rtx

Trimble CenterPoint RTX service provides real-time GNSS positioning with global coverage and fast initialization. The service is transmitted via six geostationary satellites using L-band and via NTRIP. The horizontal accuracy of kinematic positioning is better than 4 cm (95%) anytime, anywhere, and it is achieved within 30 minutes.The CenterPoint RTX system is based on the generation of precise orbit and clock corrections for GNSS satellites. These corrections are generated in real time using data streams from approximately 100 globally distributed reference stations belonging to Trimble's tracking network. Since its introduction in 2011, the system has undergone two major releases (spring 2012 and spring 2013), which included general performance improvements regarding convergence time, as well as the introduction of additional services like RangePoint RTX and features like xFill. Today, Trimble CenterPoint RTX supports GPS, GLONASS and QZSS signalsIn this work, the CenterPoint RTX system was modified in order to include correction generation for Galileo and BeiDou systems, and a prototype "all-GNSS" engine was used to demonstrate the positioning performance using data from ten stations in the Asia-Pacific region, in kinematic mode, during 4 days of August 2013.The addition of Galileo and BeiDou satellites to the standard RTX processing resulted in a reduction of 37% in the convergence time (95-percentile level), and the horizontal positioning errors were reduced by 16% for the selected datasetThis represents a considerable improvement in the currently available service and great benefits are expected once the Galileo and Beidou support is enabled in the CenterPoint RTX service.Trimble has taken steps for the worldwide GNSS users to benefit from the improved CenterPoint RTX performance through Trimble's enhanced, freely available post processing service (RTX-PP). Therefore, RTX-PP was extended by an experimental service supporting Galileo and BeiDou satellites.