Determination of reference point for Sheshan SLR telescope using self-driven prism system

作者：Zhikang Wang, Zhibin Zhang, Bin Wang, Shuzhen Yuan, Zhipeng Mei, Xiaohui Ma, Liangquan Jia, Yong Liu, Haifeng Zhang, Si Qin, Li Zhang, Chengli Huang, Zhaoxiang Qi · 发表于：Advances in Space Research · 年份：2025 · DOI：10.1016/j.asr.2025.12.015 · 被引用次数：1 · 研究领域：Adaptive optics and wavefront sensing、Optical Polarization and Ellipsometry、Optical measurement and interference techniques

High-precision geodetic datums are crucial for studying Earth’s motion and deformation, positioning, and deep space exploration. The reference point coordinates of instruments from different geodetic techniques (i.e., local tie vector) constitute fundamental elements in the construction of high-precision geodetic data set. Constrained by physical limitations, the reference point coordinates of SLR telescopes cannot be obtained through direct observation. Traditional reference point determination measurements are time-consuming and prone to systematic errors. To address these challenges, we designed and implemented a self-driven prism system that enables automatic monitoring of target points moving with the telescope. Applying this system to the Sheshan SLR telescope, the experimental results demonstrate that a few hours monitoring can achieve a submillimeter error in the reference point coordinates, with the consistency of the coordinate components of ITRF2020 within 5 mm. The self-driven prism system enables more optimal target scatter observation with improved dispersion, which in turn reduces the correlations among the solved reference point horizontal coordinates, the tilt of the azimuth axis and other parameters. Moreover, this system is highly beneficial for the high spatio-temporal resolution monitoring of reference points and local tie vectors, as well as for the construction of multi-technology geodetic reference frames.