Abstract Ionosphere-free combination sets are proposed in this paper based on three ionosphere-free combination types. Considering both position and ambiguity-fixed RMSE as evaluation indices, the optimal ionosphere-free combination sets are selected in double and triple frequency modes. Computation and analysis results show that the evaluation index of 16 combination sets are equivalent in the double-frequency model, but could not get the ambiguity-fixed in single epoch due to the pseudo-range noise being more than 0.02 m. In the triple-frequency model, there are significant differences in 2 196 independent combination sets; when the pseudo-range noise is under 0.6 m, optimal combination set can get the ambiguity-fixed in single epoch. Moreover, combination set 2-Ⅱ has better performance than both the TCAR/CIR and matrix transformation methods.
ZHAO Xiangwei,LIU Zhiping. Research on Selecting the Single-Epoch Optimal Set of Multi-Frequency Ionosphere-Free Combination[J]. jgg, 2016, 36(4): 313-318.
ZHAO Xiangwei,LIU Zhiping. Research on Selecting the Single-Epoch Optimal Set of Multi-Frequency Ionosphere-Free Combination[J]. jgg, 2016, 36(4): 313-318.