International VLBI Service for Geodesy and Astrometry Delivering high-quality products and embarking on observations of the next generation
International VLBI Service for Geodesy and Astrometry Delivering high-quality products and embarking on observations of the next generation
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DOI：
10.1007/s00190-016-0950-5
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发表时间：
2017-07-01
影响因子：
4.4
通讯作者：
Malkin, Z.
中科院分区：
文献类型：
--
作者：
Nothnagel, A.;Artz, T.;Malkin, Z.
国际大地测量和天体测量VLBI服务处（IVS）利用广泛的网络或单独的基线，通过观测会议定期产生高质量的地球定向参数。主计划是根据台站承诺的望远镜日数和对地球定向参数（EOP）进行密集采样的需要设计的。在2011年之前的时代，网络星座及其参与的望远镜数量受到硬件（Mark 4）播放器的回放和基线能力的限制。这种限制被软件播放器的出现所克服，软件播放器现在可以以灵活的配置容纳更多的播放单元。在本文中，我们描述了目前的操作的IVS，特别强调的质量极运动的结果，因为这些是唯一的EOP组件，可以验证对独立的基准。多年来，IVS提供的极移结果不断改进，现在在WRMS意义上与IGS结果在20-25的水平上一致。最后，对VLBI全球观测系统的实现进行了展望。
The International VLBI Service for Geodesy and Astrometry (IVS) regularly produces high-quality Earth orientation parameters from observing sessions employing extensive networks or individual baselines. The master schedule is designed according to the telescope days committed by the stations and by the need for dense sampling of the Earth orientation parameters (EOP). In the pre-2011 era, the network constellations with their number of telescopes participating were limited by the playback and baseline capabilities of the hardware (Mark4) correlators. This limitation was overcome by the advent of software correlators, which can now accommodate many more playback units in a flexible configuration. In this paper, we describe the current operations of the IVS with special emphasis on the quality of the polar motion results since these are the only EOP components which can be validated against independent benchmarks. The polar motion results provided by the IVS have improved continuously over the years, now providing an agreement with IGS results at the level of 20-25 as in a WRMS sense. At the end of the paper, an outlook is given for the realization of the VLBI Global Observing System.