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<p>In the precise orbit determination (POD) processing, one of the critical issues is the modeling of non-conservative solar radiation pressure (SRP) forces acting on global navigation satellite systems (GNSS) satellites. However, for the third generation of BeiDou system (BDS-3) medium Earth orbit (MEO) satellites, the missing specular and diffuse reflection coefficients in the metadata published by the China Satellite Navigation Office (CSNO) further complicate the SRP modeling. Therefore, this study presents a three-step method to estimate optical coefficients for a new analytical box-wing model. Spectral analysis confirms the significance of the second-order periodic terms in the Sun direction (D) and the first-, third-, and fifth-order periodic terms in the orthogonal axis direction (B) during non-eclipsing periods. Furthermore, the new analytical models are introduced apriori and the detected periodic terms are estimated for absorbing the remaining SRP effects. For eclipse seasons, root mean square (RMS) values of overlap orbit differences of 3.4 and 4.1&#xa0;cm can be respectively kept in the cross-track and along-track directions due to extending periodic terms in B direction, whereas the precision exceeds 5.0&#xa0;cm in radial direction. Then, we demonstrated that this degradation in radial direction is caused by the overestimated second-order periodic terms in D direction. After removing the second-order terms, standard deviations (STDs) of satellite laser ranging (SLR) residuals during eclipse seasons are improved from 6.2 to 3.9&#xa0;cm for China Academy of Space Technology (CAST) satellites and from 5.7 to 3.1&#xa0;cm for Shanghai Engineering Center for Microsatellites (SECM) satellites.</p>

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Analysis of periodic terms in the DYB frame for the solar radiation pressure model of BDS-3 MEO satellites

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年4月8日

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  • Xinghan Chen,
  • Maorong Ge,
  • Benjamin Männel,
  • Harald Schuh

摘要

In the precise orbit determination (POD) processing, one of the critical issues is the modeling of non-conservative solar radiation pressure (SRP) forces acting on global navigation satellite systems (GNSS) satellites. However, for the third generation of BeiDou system (BDS-3) medium Earth orbit (MEO) satellites, the missing specular and diffuse reflection coefficients in the metadata published by the China Satellite Navigation Office (CSNO) further complicate the SRP modeling. Therefore, this study presents a three-step method to estimate optical coefficients for a new analytical box-wing model. Spectral analysis confirms the significance of the second-order periodic terms in the Sun direction (D) and the first-, third-, and fifth-order periodic terms in the orthogonal axis direction (B) during non-eclipsing periods. Furthermore, the new analytical models are introduced apriori and the detected periodic terms are estimated for absorbing the remaining SRP effects. For eclipse seasons, root mean square (RMS) values of overlap orbit differences of 3.4 and 4.1 cm can be respectively kept in the cross-track and along-track directions due to extending periodic terms in B direction, whereas the precision exceeds 5.0 cm in radial direction. Then, we demonstrated that this degradation in radial direction is caused by the overestimated second-order periodic terms in D direction. After removing the second-order terms, standard deviations (STDs) of satellite laser ranging (SLR) residuals during eclipse seasons are improved from 6.2 to 3.9 cm for China Academy of Space Technology (CAST) satellites and from 5.7 to 3.1 cm for Shanghai Engineering Center for Microsatellites (SECM) satellites.