Workshop 2018
Shengfeng Gu - FUSING: a distributed software platform for real-time high precision multi-GNSS service - October 29, 2018 • 524 Views
The new emerged BDS and Galileo, as well as the ongoing modernized GPS and GLONASS marked the start of a new era in satellite navigation. With the continuous effort of IGS over years, the publicly accessible GNSS measurements from more than 500 world-wide distributed stations have inspired a broad range of GNSS-based applications, and expended the geodesy observation designed technique in a collaboration between atmosphere sensing and geodesy. To cope with this new trend, we launched the FUSING (FUSing IN Gnss) project. Besides the widely adopted approaches of IGS analysis centers, i.e., dual-frequency ionosphere-free combination and dual-frequency geometry-free combination, several new features are also adopted in the FUSING platform: first, the software aims to propose a highly consistent solution to derive the GNSS related geodesy and atmosphere parameters simultaneously in a single, internally coherent estimation process based on the undifferenced and uncombined observation; second, the architecture of software and algorithm are designed for prioritized RT GNSS applications, thus an efficient square root information filter (SRIF), rather than the LSQ is employed in all the GNSS data processing. With this new platform, initial results of satellite orbit and clock, signal bias of receiver and satellite, as well as the water vapor content and TEC are derived and analyzed for GPS, GLONASS, BDS and Galileo with a large data set.Keywords: Real-time, Multi-GNSS Multi-frequency, Efficiency, Undifferenced and uncombined observation, DESIGN

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