On the Influence of Known Diurnal and Subdiurnal Signals in Polar Motion and UT1 on Ring Laser Gyroscope Observations
On the Influence of Known Diurnal and Subdiurnal Signals in Polar Motion and UT1 on Ring Laser Gyroscope Observations
复制标题
极地运动和UT1中已知的日间和次日间信号对环形激光陀螺仪观测的影响
DOI：
10.1007/s00024-017-1552-8
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发表时间：
2017
影响因子：
2
通讯作者：
A. Brzeziński
中科院分区：
文献类型：
--
作者：
Monika Tercjak;A. Brzeziński
环形激光陀螺仪 (RLG) 技术作为空间大地测量技术在测量地球自转变化方面的潜在补充，已经被研究了大约 20 年。该技术引起了人们极大的兴趣，特别是在以次日分辨率监测旋转的快速变化的背景下。在本文中，我们回顾了地球自转参数中已知的高频信号，包括所谓的日极运动、极运动和UT1中的日和半日海潮效应以及平动、极运动中的顺行日和UT1中的半日，如何对RLG可观测值——萨尼亚克频率做出贡献。我们的结果表明，在目前该技术的精度水平下，分析时应考虑来自昼夜极移和海洋潮汐的信号，而可以忽略平动的影响。我们还指出，贡献信号是相互叠加的，很难从单个仪器的数据中分离出来。我们的计算是采用德国韦策尔天文台 RLG 的参数完成的。然而，我们还考虑了特定信号的强度如何取决于水平安装仪器的地理位置。最后，我们讨论了 RLG 的地理位置和地面方向之间的关系及其对观测到的萨尼亚克信号的影响。
The ring laser gyroscope (RLG) technique has been investigated for about 20 years as a potential complement to space geodetic techniques in measuring variations of Earth rotation. The technique is of great interest, especially in the context of monitoring rapid changes of rotation with sub-daily resolution. In this paper, we review how the known high frequency signals in Earth rotation parameters, including the so-called diurnal polar motion, diurnal and semidiurnal ocean tide effects in polar motion and UT1 and librations, prograde diurnal in polar motion and semidiurnal in UT1, contribute to the RLG observable, the Sagnac frequency. Our results suggest that at the current accuracy level of the technique, the signals coming from diurnal polar motion and ocean tides should be taken into account in analysis while the influence of libration can be neglected. We also point out that the contributing signals are superimposed upon each other and can hardly be separated from the data from a single instrument. Our computations are done taking parameters of the RLG at the Wettzell Observatory in Germany. However, we also consider how the strength of a particular signal depends on the geographic location of a horizontally mounted instrument. Finally, we discuss the relationship between the geographical location and terrestrial orientation of RLG and its consequence for the observed Sagnac signal.
影响因子：
2.3
作者：
T. Nilsson;J. Böhm;H. Schuh;U. Schreiber;A. Gebauer;T. Klügel
通讯作者：
T. Nilsson;J. Böhm;H. Schuh;U. Schreiber;A. Gebauer;T. Klügel
甚长基线干涉仪和环形激光观测地球自转
影响因子：
2
作者：
P. J. Mendes Cerveira;J. Boehm;H. Schuh;T. Klügel;A. Velikoseltsev;K. U. Schreiber;A. Brzezinski
通讯作者：
A. Brzezinski