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Original Research
Published 24 September 2026
A multi-tier PPP-RTK positioning method based on correction-product availability
Yuhang Hu · Fang Cheng · Pengli Shen · Xin Gao · Wenshuo Sun · Zhe Hui · Xiaochun Lu
Frontiers in Astronomy and Space Sciences
doi 10.3389/fspas.2026.1973781