Validation of Multi-Year Galileo Orbits Using Satellite Laser Ranging
Validation of Multi-Year Galileo Orbits Using Satellite Laser Ranging
复制标题
使用卫星激光测距验证多年伽利略轨道
DOI：
10.3390/rs13224634
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发表时间：
2021-11
期刊：
影响因子：
5
通讯作者：
Zhou Xuhua
中科院分区：
文献类型：
--
作者：
Tao Enzhe;Guo Nannan;Xu Kexin;Wang Bin;Zhou Xuhua
卫星激光测距观测提供了对使用微波测量得出的全球导航卫星系统轨道的独立验证。SLR残差也被证明是轨道径向精度的重要指标。在这项研究中，SLR验证进行了8个伽利略卫星的精确轨道，覆盖4至8年（目前最长的跨度），提供了多个分析中心（AC）参与多GNSS实验（MGEX）。这一长期分析（迄今为止时间最长的此类研究）的目的是全面评价轨道产品质量、其影响因素以及摄动模型更新对精确定轨处理的影响。POD采用传统的ECOM太阳辐射压（SRP）模型。结果表明，在SRP模型中，ECOM系统的角变元具有明显的周期性变化，这意味着ECOM系统存在一定的缺陷。更新的SRP描述，如ECOM 2或Box-Wing模型，导致多个AC的轨道产品的SLR残差的显着改善。这些残差的标准差从SRP更新前的8-10 cm降至SRP更新后的约3 cm。残差的系统偏倚也减少了2-4 cm，表观变异性显著降低。此外，在POD中逐步更新SRP模型的效果在轨道比较中也很明显。在径向上AC之间的轨道差异从最初的10 cm减小到优于3 cm，这与SLR残差分析的结果一致。这些结果表明，SLR验证是一个强大的技术，用于评估质量的POD战略在GNSS轨道。此外，这项研究表明，摄动模型，如SRP，提供了一个更好的伽利略卫星的轨道建模。
Satellite laser ranging (SLR) observations provide an independent validation of the global navigation satellite system (GNSS) orbits derived using microwave measurements. SLR residuals have also proven to be an important indicator of orbit radial accuracy. In this study, SLR validation is conducted for the precise orbits of eight Galileo satellites covering four to eight years (the current longest span), provided by multiple analysis centers (ACs) participating in the multi-GNSS experiment (MGEX). The purpose of this long-term analysis (the longest such study to date), is to provide a comprehensive evaluation of orbit product quality, its influencing factors, and the effect of perturbation model updates on precise orbit determination (POD) processing. A conventional ECOM solar radiation pressure (SRP) model was used for POD. The results showed distinct periodic variations with angular arguments in the SRP model, implying certain defects in the ECOM system. Updated SRP descriptions, such as ECOM2 or the Box-Wing model, led to significant improvements in SLR residuals for orbital products from multiple ACs. The standard deviation of these residuals decreased from 8–10 cm, before the SRP update, to about 3 cm afterward. The systematic bias of the residuals was also reduced by 2–4 cm and the apparent variability decreased significantly. In addition, the effects of gradual SRP model updates in the POD were evident in orbit comparisons. Orbital differences between ACs in the radial direction were reduced from the initial 10 cm to better than 3 cm, which is consistent with the results of SLR residual analysis. These results suggest SLR validation to be a powerful technique for evaluating the quality of POD strategies in GNSS orbits. Furthermore, this study has demonstrated that perturbation models, such as SRP, provide a better orbit modeling for the Galileo satellites.
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影响因子：
4.6
作者：
T. Otsubo;G. Appleby;P. Gibbs
通讯作者：
T. Otsubo;G. Appleby;P. Gibbs
影响因子：
4.4
作者：
K. Sośnica;L. Prange;K. Kaźmierski;G. Bury;M. Drożdżewski;R. Zajdel;T. Hadaś
通讯作者：
K. Sośnica;L. Prange;K. Kaźmierski;G. Bury;M. Drożdżewski;R. Zajdel;T. Hadaś
影响因子：
4.9
作者：
P. Steigenberger;O. Montenbruck
通讯作者：
P. Steigenberger;O. Montenbruck
影响因子：
2.6
作者：
Steigenberger, Peter;Hugentobler, Urs;Montenbruck, Oliver
通讯作者：
Montenbruck, Oliver
DOI：
--
发表时间：
2013
期刊：
--
影响因子：
--
作者：
O. Montenbruck;P. Steigenberger;R. Khachikyan;G. Weber;R. Langley;L. Mervart;U. Hugentobler
通讯作者：
O. Montenbruck;P. Steigenberger;R. Khachikyan;G. Weber;R. Langley;L. Mervart;U. Hugentobler