Article Details

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 single-frequency users in the case of high ionospheric activity.

Keywords

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

References

1. [1] Chen Cangcang, Liu Cheng, Lu Yin Service level and system performance analysis of Beidou satellite based augmentation system [J]. Surveying and Mapping Science, 2021, 46 (1): 42-48
2. [2] Cai Hongliang, Meng Yinan, Geng Changjiang, etc Performance evaluation of Beidou-3 global navigation satellite system services: positioning and navigation timing, satellite based augmentation, precise single point positioning, short message communication, and international search and rescue [J]. Journal of Surveying and Mapping, 2021, 50 (4): 427-435
3. [3] He Pengzi Striving to promote the application of the Beidou system - Ran Chengqi, Director of the China Satellite Navigation System Management Office [J]. Satellite and Network, 2015 (12): 14-16
4. [4] Lv Jifang Integrity Analysis and Simulation of Beidou Satellite Based Augmentation System [D]. Tianjin: Civil Aviation University of China, 2019
5. [5] Zhang Jian, Shao Bo, Xiong Shuai, etc Assessment of Single Frequency Service Area Availability of Beidou Satellite Based Augmentation System [J]. Navigation and Timing, 2021, 8 (3): 137-145
6. [6] Guo Shuren, Liu Cheng, Gao Weiguang, etc Construction and Development of Satellite Navigation Augmentation System [J]. Global Positioning System, 2019, 44 (2): 1-12
7. [7] Wang Junjun, Li Rui, Cheng Jun, etc Research on SBAS Integrity Assessment Method [J]. Modern Navigation, 2019, 10 (4): 235-240+246
8. [8] International Civil Aviation Organization. ICAO Standards and Recommended Practices, Annex 10 VOL I, Radio Navigation Aids [S/OL].[2024-09-11].https://standards.globalspec.com/std/14618098/annex-10-vol-i.
9. [9] Xiong Shuai, Zhang Jian, Shao Bo, etc Single frequency enhanced positioning method and accuracy evaluation for users of Beidou satellite based augmentation system [C]//The 12th China Satellite Navigation Annual Conference Nanchang: Academic Exchange Center of China Satellite Navigation System Management Office, 2021:46-64
10. [10] Huang Dingfa Principles of Satellite Navigation and Positioning [M]. Wuhan: Wuhan University Press, 2015
11. [11] Yu Jingju, Zhang Ruwei, Zhang Yanchao, etc Research on the Enhanced Positioning Method and Effect of Beidou Satellite Based Augmentation System [J]. Telemetry and Remote Control, 2022, 43 (5): 53-60

Funding

College Student Innovation Project Training (202304074)

About the authors

Zhang Zihan (2004-), male, Han ethnicity, from Luzhou, Sichuan, is currently pursuing a bachelor's degree with a research focus on artificial intelligence.