BDS single-frequency pseudo-range single point positioning augmented by LEO satellites

doi:10.13474/j.cnki.11-2246.2020.0080

Abstract

Abstract: Single-frequency positioning is widely used because of its cost advantages, but it cannot meet the higher accuracy requirements. The effect of enhancing single-frequency positioning accuracy of LEO satellites is explored in this paper. The observation data of BDS and Iridium satellite system are simulated based on the satellite toolkit software, and the joint positioning algorithm of high and low orbit satellites is realized by combining error modeling. The results of observation stations in different latitudes are analyzed, and the results show that when the LEO ratio increases from 5% to 18%, the positioning accuracy improvement ratio increases from 48% to 80%, showing a certain positive correlation; the standard deviation of error decreases more than 50% in U direction, and fluctuates about 10% in E and U direction, showing a general improvement trend. Therefore, the addition of LEO satellites can effectively improve the accuracy of pseudo-range single-point positioning.

Key words: BDS, LEO, single point positioning, augmented positioning

CLC Number:

P228.4

SHAO Yinxing, ZHAO Chunmei. BDS single-frequency pseudo-range single point positioning augmented by LEO satellites[J]. Bulletin of Surveying and Mapping, 2020, 0(3): 69-72.

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