ABSTRACT

February 1, 2017, EOP 14C04 aligned to the ITRF2014 was adopted by IERS. To assess the improvement of EOP 14C04, the differences between EOP 14C04 and EOP 08C04 are firstly analyzed. Then, the causes of the differences between the two solutions are examined. Finally, the differences are further assessed for their prediction performance using the LS+AR model. The results demonstrate that (1) there is a trend in the difference between the two solutions; (2) the cause of the above-mentioned difference should be attributed to the different reference frames; (3) the new EOP 14C04 shows better performance for high-frequency signals.

摘要

2017 年 2 月 1 日，与 ITRF2014 一致的 EOP 14C04 被 IERS 采用。为了评估 EOP 14C04 的改进情况，首先分析了 EOP 14C04 和 EOP 08C04 之间的差异。然后，检查两种解决方案之间差异的原因。最后，使用 LS+AR 模型进一步评估差异的预测性能。结果表明：（1）两种解决方案之间存在差异趋势；（2）造成上述差异的原因应归因于不同的参考系；(3) 新的 EOP 14C04 对高频信号表现出更好的性能。