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Near-Real Time Precise Orbit Determination Method for Low Earth Orbit Satellites Based on Sliding Window
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Haoran GONG1, 2, 3, Chen WANG1, 2, 3, *, Chen REN1, 2, 3, Zhenhong LI1, 3, 4
Journal of Geodesy and Geodynamics | 2026, 46(4) : 487 - 496
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Journal of Geodesy and Geodynamics | 2026, 46(4): 487-496
Near-Real Time Precise Orbit Determination Method for Low Earth Orbit Satellites Based on Sliding Window
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Haoran GONG1, 2, 3, Chen WANG1, 2, 3, *, Chen REN1, 2, 3, Zhenhong LI1, 3, 4
Affiliations
  • 1 School of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, China
  • 2 Big Data Center for Geosciences and Satellites, Chang'an University, Xi'an 710054, China
  • 3 State Key Laboratory of Loess Science, Xi'an 710054, China
  • 4 Key Laboratory of Western China's Mineral Resources and Geological Engineering, Ministry of Education, Xi'an 710054, China
Published: 2026-04-15 doi: 10.14075/j.jgg.2025.06.201
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Based on reduced-dynamic method, we utilize sliding window to achieve near-real time orbit calculation and recursive update for low Earth orbit satellites, and verify the accuracy and effectiveness of orbit determination. Taking the observation data of GRACE-FO and Swarm-B satellites from January 15 to 26, 2025 as an example, the results show that there is no significant systematic error in the tangential, normal, and radial orbit overlapping arc segments calculated using sliding window. Compared with the official released precise science orbit, the root mean square (RMS) of orbit difference in calculation part in three directions is all within 5 cm, and the residual RMS of satellite laser ranging (SLR) validations are 3.03 cm, 4.14 cm, and 3.15 cm, respectively. At a predicted arc length of 60 minutes, the average radial orbit RMS of three satellites is about 10 cm. In addition, changing the initial value of subsequent arc segment orbit from standard point positioning (SPP) to reusing the calculation and extrapolation result of previous arc segment orbit can shorten the single arc segment solution time from 10 minutes to 5 minutes.

near-real time precise orbit determination  /  low Earth orbit  /  sliding window  /  reduced-dynamic method
龚浩冉, 王晨, 任琛, 李振洪. 基于滑动窗口的低轨卫星近实时精密定轨方法. 大地测量与地球动力学, 2026 , 46 (4) : 487 -496 . DOI: 10.14075/j.jgg.2025.06.201
Haoran GONG, Chen WANG, Chen REN, Zhenhong LI. Near-Real Time Precise Orbit Determination Method for Low Earth Orbit Satellites Based on Sliding Window[J]. Journal of Geodesy and Geodynamics, 2026 , 46 (4) : 487 -496 . DOI: 10.14075/j.jgg.2025.06.201
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Year 2026 volume 46 Issue 4
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Article Info
doi: 10.14075/j.jgg.2025.06.201
  • Receive Date：2025-06-16
  • Online Date：2026-10-29
  • Published：2026-04-15
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  • Received：2025-06-16
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Affiliations
    1 School of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, China
    2 Big Data Center for Geosciences and Satellites, Chang'an University, Xi'an 710054, China
    3 State Key Laboratory of Loess Science, Xi'an 710054, China
    4 Key Laboratory of Western China's Mineral Resources and Geological Engineering, Ministry of Education, Xi'an 710054, China
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表12种不同金属材料的力学参数
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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