| 摘要: |
| 全球卫星导航系统(GNSS)提供导航、定位和授时服务的过程中存在完好性风险，限制了其在高生命安全领域的发展。星基增强系统（SBAS）通过地球静止轨道（GEO）卫星或其他中高轨道卫星播发卫星轨道和钟差、电离层延迟等改正信息和完好性信息，提高用户定位精度，并提供高可靠的完好性服务。星基增强技术经过30多年的发展已趋于成熟。从卫星轨道和钟差改正数解算、电离层建模、完好性参数优化和定位服务性能评估方面总结和梳理了星基增强技术的研究现状，揭示了目前存在的主要问题，并提出了技术发展建议和对SBAS未来发展机遇的分析，以期进一步拓展其应用范围。 |
| 关键词: 星基增强系统(SBAS) 完好性 卫星轨道改正数 钟差 电离层 |
| DOI： |
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| 基金项目:陕西省重点研发计划(2022KW-09，2021LLRH-06，2020ZDLGY02-05);陕西省创新能力支撑计划(2021TD-03);长安大学中央高校基本科研业务费专项资金(300102261301) |
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| A review on the development of satellite-based augmentation technology |
| WANG Le,SHE Jinbo,ZHANG Xugang,WANG Ziwei,SHAO Bo |
| (School of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, China; Engineering Research Center of Intelligent BDS, Universities of Shaanxi Province, Xi'an 710054, China; Shaanxi Yellow River Science Research Institute, Xi'an 710054, China;The 20th Research Institute of CETC, Xi'an 710068, China) |
| Abstract: |
| There is an integrity risk in the process of providing navigation, positioning and timing services through the global navigation satellite system (GNSS), which limits its development in the area of high life safety. Satellite based augmentation system (SBAS) broadcasts correction information such as satellite orbits and clock errors, ionospheric delays and integrity information via geostationary Earth orbit (GEO) satellites or other medium and high orbit satellites, improving users‘ positioning accuracy and providing highly reliable integrity services. After more than three decades of development, satellite-based augmentation technology has matured. The current state of SBAS research is summarized and reviewed in several key areas, including the computation of satellite orbit and clock error corrections, ionospheric modeling, optimization of integrity parameters and evaluation of positioning performance. The main challenges currently facing SBAS technologies are identified, and suggestions for technology development and further analysis of the future development direction of SBAS are proposed with a view to further expanding the scope of SBAS applications. |
| Key words: Satellite-based augmentation system (SBAS) Integrity Satellite orbit corrections Clock error Ionosphere |
