Aspects of using the QZSS Satellite in the Trimble CenterPoint RTX Service: QZSS Orbit and Clock Accuracy, RTX Positioning Performance Improvements

摘要

Mid of 2011 Trimble introduced the CenterPoint RTX real-time positioning service providing cm-accurate positions for real-time applications. This service targets applications in the precision markets like Precision Agriculture, Survey and Construction, and relies on the generation of precise orbit and clock information for GPS and GLONASS satellites in real-time. The CenterPoint RTX satellite corrections are generated with data from Trimble's world-wide tracking network, consisting of approximately 100 globally distributed reference stations. A subset of currently 25 stations in the Asia-Pacific region is able to track the QZSS satellite. Unlike GPS and GLONASS, which were supported by CenterPoint RTX from the very beginning, the inclined geostationary orbit of the QZSS satellite causes some additional challenges on the orbit and clock estimation process. The most relevant aspects are the MEO satellite's higher orbit, the geometry of the orbit track, and the tracking network available in the region of interest.