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<p>Solar Radiation Pressure (SRP), which is associated with the satellite’s surface structure and optical properties, plays a crucial role in satellite Precise Orbit Determination (POD). The Satellite Laser Ranging (SLR) validation of the BDS-3 precise orbit from International GNSS Service Multi-GNSS Experiment (IGS MGEX) reveals significant β-angle-dependent errors in C45/C46 satellites, reaching 30&#xa0;cm at high β angles. Furthermore, the Orbit Boundary Disclosures (OBD) results demonstrate that Inclined Geosynchronous Orbit (IGSO) satellites exhibit significantly inferior orbit accuracy compared to Medium-circular Earth Orbit (MEO) satellites. In view of this phenomenon, a comparison between the theoretical trend and the actual value of the <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10291_2025_1913_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="22" /> </InlineMediaObject> <EquationSource Format="TEX">\({D}_{0}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>D</mi> <mn>0</mn> </msub> </math></EquationSource> </InlineEquation> parameter in Extended CODE Orbit Model (ECOM) is conducted, revealing that the satellite antennas may introduce additional SRP perturbations. Consequently, an a priori model that includes antenna illumination was established based on the adjustable box-wing model. The employment of the a priori model shows a notable enhancement in orbit accuracy for the BDS-3 satellites. The mean offset and standard deviation of SLR residuals for C45/C46 are reduced to a level consistent with satellites from the same manufacture. The systematic errors in the residuals are significantly reduced, achieving the RMS of 3.85 cm, which represents a 74% improvement over the results obtained using only ECOM1. For IGSO satellites, the 3D OBD is reduced to 18.3 cm, reflecting improvements of 56% and 25% over ECOM1 and ECOM2, respectively. Moreover, the 3-day-arc POD has been demonstrated to markedly enhance the orbit internal consistency of the IGSO satellite, with a 3D OBD reduction to 3.1 cm.</p>

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Refinement of the solar radiation pressure model for the BDS-3 satellites with considering illuminated antennas

  • 期刊论文

  • 发表日期：

    2025年6月25日

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  • Tao Geng,
  • Chao Zhang,
  • Xin Xie,
  • Yifei Lv

摘要

Solar Radiation Pressure (SRP), which is associated with the satellite’s surface structure and optical properties, plays a crucial role in satellite Precise Orbit Determination (POD). The Satellite Laser Ranging (SLR) validation of the BDS-3 precise orbit from International GNSS Service Multi-GNSS Experiment (IGS MGEX) reveals significant β-angle-dependent errors in C45/C46 satellites, reaching 30 cm at high β angles. Furthermore, the Orbit Boundary Disclosures (OBD) results demonstrate that Inclined Geosynchronous Orbit (IGSO) satellites exhibit significantly inferior orbit accuracy compared to Medium-circular Earth Orbit (MEO) satellites. In view of this phenomenon, a comparison between the theoretical trend and the actual value of the \({D}_{0}\) D 0 parameter in Extended CODE Orbit Model (ECOM) is conducted, revealing that the satellite antennas may introduce additional SRP perturbations. Consequently, an a priori model that includes antenna illumination was established based on the adjustable box-wing model. The employment of the a priori model shows a notable enhancement in orbit accuracy for the BDS-3 satellites. The mean offset and standard deviation of SLR residuals for C45/C46 are reduced to a level consistent with satellites from the same manufacture. The systematic errors in the residuals are significantly reduced, achieving the RMS of 3.85 cm, which represents a 74% improvement over the results obtained using only ECOM1. For IGSO satellites, the 3D OBD is reduced to 18.3 cm, reflecting improvements of 56% and 25% over ECOM1 and ECOM2, respectively. Moreover, the 3-day-arc POD has been demonstrated to markedly enhance the orbit internal consistency of the IGSO satellite, with a 3D OBD reduction to 3.1 cm.