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REN Tingling, LUO Bingxian, MIAO Juan, WANG Ronglan, WANG Xin, LIU Siqing. Accuracy Assessment of the TLE-derived Orbital Atmospheric Densities (in Chinese). Chinese Journal of Space Science, 2025, 45(3): 717-728 doi: 10.11728/cjss2025.03.2024-0060
Citation: REN Tingling, LUO Bingxian, MIAO Juan, WANG Ronglan, WANG Xin, LIU Siqing. Accuracy Assessment of the TLE-derived Orbital Atmospheric Densities (in Chinese). Chinese Journal of Space Science, 2025, 45(3): 717-728 doi: 10.11728/cjss2025.03.2024-0060
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Accuracy Assessment of the TLE-derived Orbital Atmospheric Densities

doi: 10.11728/cjss2025.03.2024-0060 cstr: 32142.14.cjss.2024-0060
  • 1.

    State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing 100190

  • 2.

    Key Laboratory of Solar Activity and Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing 100190

  • 3.

    Key Laboratory of Science and Technology on Environmental Space Situation Awareness, Chinese Academy of Sciences, Beijing 100190

  • 4.

    University of Chinese Academy of Sciences, Beijing 101408

  • Received Date: 2024-04-18
  • Rev Recd Date: 2024-08-20
    • Available Online: 2024-09-09
    Abstract
  • In this research, we derived TLE-based atmospheric densities along CHAMP and GRACE-A orbits, and the density errors were calculated based on the high-accuracy accelerometer densities, empirical models errors including NRLMSISE-00, JB2008 and MSIS2.0 were also estimated for comparison. Improvement ratios, which defined as the percentage of TLE density errors smaller than that of empirical models, were given in the subsequent contents, and lay a theoretical foundation for the accuracy and application of the TLE-derived densities. TLE data ranged from 2002 to 2017, and two different kinds of densities, including TLE-averaged and TLE-calibrated densities, were derived. The former ones have a temporal resolution of 3 days, and were independent of the empirical models; the latter ones were calibrated values which relies on the empirical models. Results indicate that the TLE-averaged densities have a general average error smaller than 5%, and a standard deviation no bigger than 8%; the TLE-calibrated densities have the minimum errors during geomagnetic quiet conditions, with the improvement ratios bigger than 80%.

     

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    • References(27)
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