基于GF模型的BDS-3/GPS/Galileo三频模糊度固定性能分析

基于实测数据评估基于无几何（geometry-free，GF）模型的BDS-3/GPS/Galileo三频模糊度固定性能。首先给出适用于BDS-3/GPS/Galileo短基线TCAR（triple-frequency carrier ambiguity resolution）算法的三频线性组合；然后基于不同长度的实测短基线数据，评估BDS-3/GPS/Galileo超宽巷、宽巷及窄巷模糊度单历元固定性能。结果表明，对于5 m、3.6 km和13.1 km三条基线，BDS-3/GPS/Galileo超宽巷模糊度固定率相当（99.7%以上），BDS-3/GPS宽巷模糊度固定率（97.2%以上）略优于Galileo（93.0%以上），BDS-3窄巷模糊度固定率（92.2%以上）略优于GPS/Galileo（89.4%以上）。

Performance Analysis of BDS-3/GPS/Galileo Triple-Frequency Ambiguity Resolution Based on Geometry-Free Model

In this paper, we evaluate the performance of BDS-3/GPS/Galileo triple-frequency carrier ambiguity resolution(TCAR) based on geometry-free(GF) model with raw data. We first present triple-frequency linear combinations that are suitable for the BDS-3/GPS/Galileo TCAR with short baselines. Then we evaluate the performance of BDS-3/GPS/Galileo single-epoch extra-wide lane(EWL), wide lane(WL), and narrow lane(NL) ambiguity resolution with raw data from short baselines of different lengths. Experimental results demonstrate that for the baselines of 5 m, 3.6 km and 13.1 km, the fixing rates of EWL ambiguities for BDS-3/GPS/Galileo are similar(more than 99.7%), and the fixing rates of WL ambiguities for BDS-3/GPS(more than 97.2%) are slightly higher than Galileo(more than 93.0%). The fixing rates for BDS-3 NL ambiguities(more than 92.2%) are slightly higher than GPS/Galileo(more than 89.4%).