Journal of Astronautics ›› 2018, Vol. 39 ›› Issue (11): 1292-1298.doi: 10.3873/j.issn.1000-1328.2018.11.012

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Quality Evaluation of Fractional Bias Products and Analysis of Integer Ambiguity Resolution

ZHANG Yu xi, ZHANG Xiao hong, ZHU Feng   

  1. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China
  • Received:2018-01-29 Revised:2018-04-12 Online:2018-11-15 Published:2018-11-25

Abstract:

Two kinds of fractional bias products for precise point positioning (PPP) integer ambiguity fixing are compared in order to evaluate the data quality and ambiguity-fixed effects with different fractional bias products. The results show that the two products have a high degree of mutual compliance and the SGG FCB product is more complete. The horizontal averaged position RMS of the static ambiguity-fixed PPP can reach within 1 cm in the plane and the precision of elevation can reach 1~2 cm. The fixed rate of the ambiguity is very closed in different session lengths for using the different products. When dealing with the static data in the dynamical mode, the position results can reach the precision of the plane 2~3 cm and the elevation accuracy within 5 cm. The difference of the two products’ positioning results is no more than 5 mm. And the ambiguity fixing success rates are 92.37%, and 92.14%, respectively in one hour. The two fractional deviation products are fixed for the first time in about 23 minutes, which can effectively improve the convergence time of PPP. The airborne dynamic data results are basically the same with the static data.

Key words:  PPP ambiguity fixed resolution, Fractional bias product, Single difference between satellites, Integer phase clock

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