统一全球地壳垂直运动参考基准的方法研究

目的 提出一种以SLR作为统一全球地壳垂直运动参考基准的方法。利用SLR、GNSS和 VLBI国际分析中心提交给ITRF2008和ITRF2005的坐标速度场数据,选出精度较高的并置站,并经坐标转换计算出各自站心坐标系下的垂向速度场。基于系统差模型解算出 SLR与 GNSS、VLBI的垂向速度场之间的系统差,并利用此系统差将 GNSS、VLBI的垂向速度场改正到以 SLR为垂直运动参考基准上来。经一致性检验发现,改正后相关系数和斜率都趋近于1,这表明以SLR作为统一地壳垂直运动参考基准是可行的。

A Method of Unifying the Global Crustal Vertical Motion Reference Datum

Objective One method for taking SLR as the global crustal vertical motion reference datum is proposedafter considering SLR ranging characteristics.The data for coordinates and velocity fields that SLR,GNSS and VLBI analysis centers submitted to the ITRF2008and ITRF2005was used to select highprecision co-location sites and calculate their vertical velocity field in the local coordinate system usingcoordinate conversion.Systematic errors between SLR and GNSS or VLBI vertical velocity field werecalculated based on a deduced mathematical model.With the calculated systematic errors,the verticalvelocity fields of GNSS and VLBI were corrected to the SLR vertical motion reference datum.TakingSLR as the global crustal vertical motion reference datum was proven to be feasible as the correlationcoefficient as the slope tends to be 1after consistency inspection.