Analysis and Experimental Research on Data Characteristics of BDS Positioning Error

Abstract

Aiming at the problem that the integrity evaluation of satellite navigation and its augmentation system needs to analyze the characteristics of positioning error data, this paper proposes to use the time series analysis method to analyze the characteristics of the positioning error data of BDS single-point positioning and differential positioning from multiple angles of self-correlation, extremity and thick tail, which can provide the basis for deducing the integrity risk value by establishing an accurate positioning error distribution model. The result shows that the self-correlation of BDS differential positioning error is significantly lower than that of single-point positioning error. And the error of the two positioning methods in vertical and horizontal directions shows the characteristic of thick tail. Compared with the normal distribution, the single-point vertical positioning error has the most serious thick tail, reaching 420.3% and the differential horizontal positioning error has the lightest thick tail, only 22.9%. This indicates that the differential positioning method has better positioning performance and integrity.