基于BDSBAS的单频定位精度研究

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中图分类号：TN967.1 文献标识码：A 文章编号：2096-4706（2025）09-0010-06

Abstract： Global Navigation Satellite System （GNSS） is widely used in modern technology， but the single-frequency positioning accuracy is often affected by errors such as ionospheric delay. The BeiDou Satellite-Based Augmentation System （BDSBAS） is an important component of Chinese BeiDou Global Satellite Navigation System （BDS）. It utilizes GEO satellites to broadcast orbit/clock bias correction numbers， ionospheric correction numbers， and integrity information， significantly improving the single-frequency positioning accuracy to meet the application needs of high-life safety. This paper analyzes the correction performance of the BDSBAS， researches the method of using a combination of measured data and simulation analysis， and compares positioning performance under different scenarios. It proves that the BDSBAS single-frequency positioning still maintains good performance in obstructed environments and has a significant improvement in positioning accuracy for singlefrequency users in the case of high ionospheric activity.

Keywords： BDSBAS; single-frequency positioning; positioning accuracy; ionospheric delay

0 引 言

全 球 导 航 卫 星 系 统（Global Navigation SatelliteSystem， GNSS）广泛应用于航空、交通、军事等多个领域。（剩余7353字）