Abstract
To evaluate the satellite orbit and clock errors of COMPASS, we compare the difference between broadcast ephemeris and precise orbits and clocks. Results show that the orbit errors present certain periodicity for GEO and IGSO satellites. The SISRE of COMPASS is larger than GPS and GLONASS overall. However, the broadcast ephemeris of COMPASS appears regular changes in short time. Based on this, we establish different rapid correction models for COMPASS satellite orbits and clocks error. Analysis proves that the result performs well when the length of the arc for the model is shorter than 30 min, and the linear model is best for satellite clock corrections. By using this model, we predict the corrections of the satellite orbits and clocks, which is used for pseudo-range and carrier phase positioning. Results show that the positioning accuracy is on the same level with precise products for pseudo-range and carrier phase, while the convergence time is longer. This research provides an important basis for the realization of sub-meter wide area augmentation of COMPASS.
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Acknowledgments
This paper is supported by the 100 Talents Programme of The Chinese Academy of Sciences, the National High Technology Research and Development Program of China (Grant No. 2013AA122402), the National Natural Science Foundation of China (NSFC) (Grant No. 11273046 and 40974018), and the Shanghai Committee of Science and Technology (Grant No. 12DZ2273300, 13PJ1409900).
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Zhang, Y. et al. (2014). Modeling and Application of COMPASS Satellite Orbits and Clocks Predicted Correction. In: Sun, J., Jiao, W., Wu, H., Lu, M. (eds) China Satellite Navigation Conference (CSNC) 2014 Proceedings: Volume II. Lecture Notes in Electrical Engineering, vol 304. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-54743-0_16
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DOI: https://doi.org/10.1007/978-3-642-54743-0_16
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