International VLBI Service for Geodesy and Astrometry: Earth orientation parameter combination methodology and quality of the combined products

International VLBI Service for Geodesy and Astrometry: Earth orientation parameter combination methodology and quality of the combined products
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国际大地测量和天体测量 VLBI 服务:地球定向参数组合方法和组合产品的质量

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发表时间:
2010
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通讯作者:
V. Tesmer
V. Tesmer
中科院分区:
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文献类型:
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作者:
S. Böckmann;T. Artz;A. Nothnagel;V. Tesmer

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国际大地测量和天体测量VLBI服务(IVS)的分析协调员定期发布地球定向参数(EOP)的官方IVS产品。两年来,这些参数都是通过组合多达六个 IVS 分析中心的无数据正规方程来产生的。在本文中,我们记录了组合方法,讨论了关键问题,并报告了产品质量。甚长基线干涉测量结果与国际全球导航卫星系统 (GNSS) 服务 GPS EOP 的一致性约为日长 18 μs,极动分量及其速率分别约为 100 μas(微弧秒)和 300 μas/d。
The analysis coordinator of the International VLBI Service for Geodesy and Astrometry (IVS) regularly disseminates the official IVS products of Earth orientation parameters (EOPs). For 2 years now, these parameters have been produced by combining datum‐free normal equations of up to six IVS analysis centers. In this paper we document the combination methodology, discuss critical issues, and report on the quality of the products. The agreement of the very long baseline interferometry results with the International Global Navigation Satellite Systems (GNSS) Service GPS EOPs is of the order of 18 μs for length of day and 100 μas (microarc seconds) and 300 μas/d for the polar motion components and their rates, respectively.