Erratum to: On comparison of the Earth orientation parameters obtained from different VLBI networks and observing programs
Erratum to: On comparison of the Earth orientation parameters obtained from different VLBI networks and observing programs
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勘误：关于从不同 VLBI 网络和观测计划获得的地球定向参数的比较
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Z. Malkin
中科院分区：
文献类型：
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作者：
Z. Malkin
本文提出了一种新的VLBI观测网几何指标--网体积V，并将其作为VLBI观测结果中地球定向参数误差的指标。研究表明，EOP的精度和准确度都可以很好地用幂律σ = aV来描述
C
在从国内到全球VLBI网络的网络规模的广泛。换句话说，随着网络容量的增长，EOP误差遵循幂律变得更小。这应该考虑到从不同的VLBI网络获得的EOP估计进行适当的比较。因此，执行正确的EOP比较允许我们精确地调查影响EOP误差的更精细的因素。特别地，发现EOP精度和准确度对记录数据速率的依赖性也可以由幂律描述。一个重要的结论是，EOP精度主要取决于网络的几何形状，并在较小程度上取决于其他因素，如记录模式和数据速率和调度参数，而这些因素对EOP精度有更大的影响。
In this paper, a new geometry index of very long baseline interferometry (VLBI) observing networks, the volume of network V, is examined as an indicator of the errors in the Earth orientation parameters (EOP) obtained from VLBI observations. It has been shown that both EOP precision and accuracy can be well described by the power law σ = aV
c
in a wide range of the network size from domestic to global VLBI networks. In other words, as the network volume grows, the EOP errors become smaller following a power law. This should be taken into account for a proper comparison of EOP estimates obtained from different VLBI networks. Thus, performing correct EOP comparison allows us to investigate accurately finer factors affecting the EOP errors. In particular, it was found that the dependence of the EOP precision and accuracy on the recording data rate can also be described by a power law. One important conclusion is that the EOP accuracy depends primarily on the network geometry and to lesser extent on other factors, such as recording mode and data rate and scheduling parameters, whereas these factors have a stronger impact on the EOP precision.