卫星激光测距系统稳定性分析及提高

以典型SLR系统为研究平台,根据测量数据的产生流程,详细分析了卫星测量与系统校准时的状态差异,并评估了状态差异对测量数据距离偏差的影响,引出SLR测量数据稳定性提升的途径.研究成果用于上海天文台SLR系统后,2015年度对地球动力学卫星(Lageos)观测数据的长期稳定性、短期稳定性和标准点精度分别由改造前的12. 7 mm、22. 7 mm和2. 0 mm提升到4. 1 mm、9. 3 mm和1. 0 mm,国内率先达到国际卫星激光测距组织(ILRS)的数据质量标准(10 mm,20 mm和5 mm)并持续保持,提升了我国在SLR领域的国际地位和观测数据权重,具有良好的推广应用前景.

Analysis and improvement on stability of satellite laser ranging system

Based on the platform of typical SLR system, according to generation flow of SLR measurement data, extracting the difference between satellite measurement and calibration, measuring and analyzing the influence of various factors due to range bias of SLR measurement data, and technical approaches to improve the stability of SLR measurement data is provided in the paper. After applying the above research results, the long-term stability, short-term stability, and normal points accuracy of Lageos satellite at Shanghai SLR station, have been decreased from 12.7 mm, 22.7 mm and 2.0 mm in 2014 to 4.1 mm, 9.3 mm and 1.0 mm in 2015 respectively, which firstly reached the data quality standards of ILRS (10 mm, 20 mm, and 5 mm) in China ,and also improve international position in the field of SLR and the weight of observational data, with good prospects for promotion and application.