High-precision real-time orbit and clock error are the foundation of precise positioning. To address the issue of instability in real-time products from a single analysis center, this paper studies and validates a comprehensive method for multi-GNSS real-time orbit and clock products. Experimental results show that the integrated product from multiple analysis centers avoids service discontinuity caused by data interruptions in a single analysis center, with the completeness rate of four-system products increasing from 27.53%~99.10% to 99.13%~100%. The accuracy of the integrated orbit and clock error products is superior to that of most analysis centers, with an average improvement in one-dimensional averaging accuracy of the four-system orbit ranging from 43.6% to 55.7%, the average improvement in clock accuracy is in 12.3%~24.5%; The convergence time and positioning accuracy of the integrated product’s precise dynamic positioning are comparable to those of the optimal analysis center. Specifically, the convergence time is on average 42.1% shorter than that of a single analysis center. The positioning accuracies in the east, north and height directions are 2.4 cm, 3.9 cm and 4.8 cm, respectively, with relative improvements of 32%, 14%, and 24% compared to the positioning results of the analysis center product. The conclusion indicates that the method proposed in this paper can provide technical support for real-time high-precision applications of satellite navigation systems.
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