Evaluation of ambiguity fixation performance in GPS and BDS-3 integrated non-combined kinematic precise point positioning

doi:10.13474/j.cnki.11-2246.2025.0701

Abstract

Abstract: This paper compares and analyzes the ambiguity resolution performance of GPS,BDS-3 and the integration of GPS and BDS-3 for non-combined dynamic precise point positioning (PPP). The results indicate that the integration of GPS and BDS-3 increases the number of observable satellites and optimizes the spatial geometric structure, thereby effectively reducing the initial ambiguity fix time, improving the ambiguity fix rate, and enhancing the positioning accuracy. For GPS, the average initial ambiguity fix time and fix rate are 28.7 minutes and 98.6%, respectively, while the positioning accuracies in the horizontal, vertical, and 3D directions after convergence are 0.9, 1.7, and 1.9 cm, respectively. For BDS-3, the average initial ambiguity fix time and fix rate are 47.2 minutes and 96.9%, respectively, while the positioning accuracies in the horizontal, vertical, and 3D directions after convergence are 1.4, 2.5, and 2.7 cm, respectively. When GPS and BDS-3 are integrated, the average initial ambiguity fix time and fix rate reach 13.2 minutes and 99.5%, respectively, and the positioning accuracies in the horizontal, vertical, and 3D directions after convergence are 0.8, 1.6, and 1.8 cm, respectively.

Key words: GPS+BDS-3 integration, non-combined PPP, ambiguity resolution, performance evaluation

CLC Number:

P228

ZHAI Yan, XIE Rui, YANG Li. Evaluation of ambiguity fixation performance in GPS and BDS-3 integrated non-combined kinematic precise point positioning[J]. Bulletin of Surveying and Mapping, 2025, 0(7): 1-4.

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