In February 2023, the International Laser Ranging Service started the tracking of additional medium Earth orbit satellites from the global BeiDou navigation satellite system (BDS) constellation, increasing the total number of tracked BDS satellites to 27. As an optical space geodesy technique, the Satellite Laser Ranging (SLR) provides another important measurement for BDS other than the microwave (L-band) one. Based on three years of data from June 2021 to May 2024, the potential benefits of introducing SLR data into BDS processing and analysis are investigated from three key aspects: orbit validation, precise orbit determination, and geodetic parameters estimation. The independent SLR validations of BDS precise orbit products from four analysis centers show that using the a priori box-wing model for solar radiation pressure (SRP) modeling can achieve superior performance than purely empirical models. The results also indicate the existence of SRP modeling deficiencies for some satellites such as C45 and C46 with Search and Rescue payloads. Given a sparse ground network with 5 stations, the introduction of SLR significantly stabilizes the SRP parameter estimates and improves the orbit accuracy by 44.4%. In terms of geodetic parameter estimation, the scatter of the Z-component geocenter motion can be effectively reduced with the inclusion of SLR data, presenting 10.9–15.3% smaller root mean square (RMS) values during February 2023 and May 2024, depending on the SRP models. In addition, the annual amplitudes of the Z-component geocenter motion are reduced by 7.2–48.2%. The improvement is more pronounced with a limited number of microwave stations, due to the greater strength of SLR observations in geocenter motion estimation. On the other hand, since the SLR observations are unhomogeneously distributed in both space and time, the incorporation of SLR does not evidently enhance the accuracy of Earth rotation parameters, and may even to some extent contaminate the results when the number of microwave stations is limited.

2023 年 2 月，国际激光测距服务开始跟踪来自全球北斗导航卫星系统 （BDS） 星座的额外中地球轨道卫星，使跟踪的 BDS 卫星总数增加到 27 颗。卫星激光测距 （SLR） 作为一种光学空间测地技术，为北斗提供了除微波（L 波段）之外的另一种重要测量方法。基于 2021 年 6 月至 2024 年 5 月的三年数据，从三个关键方面研究了将 SLR 数据引入 BDS 处理和分析的潜在好处：轨道验证、精确定轨和大地测量参数估计。来自四个分析中心的 BDS 精确轨道产品的独立 SLR 验证表明，使用先验箱翼模型进行太阳辐射压力 （SRP） 建模可以获得比纯经验模型更好的性能。结果还表明，一些卫星（例如具有搜索和救援有效载荷的 C45 和 C46）存在 SRP 建模缺陷。给定一个具有 5 个站点的稀疏地面网络，引入 SLR 显著稳定了 SRP 参数估计，并将轨道精度提高了 44.4%。在大地测量参数估计方面，通过 SLR 数据的纳入可以有效减少 Z 分量地心运动的散射，在 2023 年 2 月和 2024 年 5 月期间，均方根 （RMS） 值减小了 10.9-15.3%，具体取决于 SRP 模型。此外，Z 分量地心运动的年振幅降低了 7.2-48.2%。由于地心运动估计中 SLR 观测的强度更大，因此在有限数量的微波站中，改进更为明显。 另一方面，由于 SLR 观测在空间和时间上都分布不均匀，因此 SLR 的加入并不能明显提高地球自转参数的准确性，甚至可能在微波站数量有限的情况下在一定程度上污染结果。