Modeling and assessment of GPS/BDS/Galileo triple-frequency precise point positioning

doi:10.11947/j.AGCS.2021.20200146

Abstract

Abstract: With careful consideration of time-varying characteristics of pseudorange and carrier phase hardware biases, more rigorous undifferenced and uncombined observation equations are derived, and the mathematical expressions of the two types of GNSS biases in uncombined mode are given. Based on this, this contribution studied independent parameterization methods of three commonly used triple-frequency precise point positioning (PPP) (i.e., ionosphere-free combination IF1213 and IF123 as well as uncombination UC123) function models in detail, and systematically analyzed the relationship among these models. Subsequently, the positioning performance in terms of positioning accuracy for GPS/BDS/Galileo triple-frequency PPP in static and kinematic modes was assessed. The experimental results showed that the positioning accuracy after convergence for static PPP was better than 1.0 and 1.5 cm; while that for kinematic PPP was better than 2.0 and 5.0 cm in horizontal and vertical components, respectively. Moreover, the positioning performance of triple-frequency and dual-frequency PPP was comparable.

Key words: GPS/BDS/Galileo, precise point positioning, GNSS bias, triple-frequency observation, positioning performance

CLC Number:

P228

ZHOU Feng, XU Tianhe. Modeling and assessment of GPS/BDS/Galileo triple-frequency precise point positioning[J]. Acta Geodaetica et Cartographica Sinica, 2021, 50(1): 61-70.

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