On the Influence of Diurnal and Subdiurnal Signals in the Normal Vector on Large Ring Laser Gyroscope Observations

On the Influence of Diurnal and Subdiurnal Signals in the Normal Vector on Large Ring Laser Gyroscope Observations
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法向矢量中的昼夜信号对大环激光陀螺仪观测的影响

DOI:
10.1007/s00024-020-02484-2
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发表时间:
--
影响因子:
2
通讯作者:
Schreiber
Schreiber
中科院分区:
地球科学3区
文献类型:
--
作者:
Tercjak;Gebauer;Rajner;Brzeziński;Schreiber

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环形激光陀螺仪 (RLG) 技术作为测量地球自转的空间大地测量技术的潜在补充已被研究了 20 多年。然而,RLG 对其陆地方向的变化也很敏感。因此,在本文中,我们回顾了导致场地变形的已知现象的高频段(即每天短于 0.5 个周期的信号)如何对 RLG 可观测值(萨尼亚克频率)做出贡献。我们研究固体潮汐、海洋潮汐载荷和非潮汐载荷现象(大气压力载荷和大陆水圈载荷)的影响。此外,我们还评估了现有现象模型之间的差异以及用于模拟固体地球潮汐影响的洛夫数的重要性。最后,我们将仪器方向的建模变化与倾斜计观察到的变化进行比较。我们的结果证明,在目前RLG技术的精度下,固体潮汐和海洋潮汐载荷效应对RLG测量有显着影响,而大陆水圈载荷实际上可以忽略不计。对于大气负荷模型,其应用可能会引入一些不需要的信号。我们还表明,由于使用不同模型而产生的差异可以忽略不计,并且使用不同的乐福数几乎不会产生影响。最后,我们讨论了通过倾斜计观测减少的数据与通过建模信号减少的数据之间的差异,以及造成这种差异的潜在原因。
The ring laser gyroscope (RLG) technique has been investigated for over 20 years as a potential complement to space geodetic techniques in measuring Earth rotation. However, RLGs are also sensitive to changes in their terrestrial orientation. Therefore in this paper, we review how the high-frequency band (i.e. signals shorter than 0.5 cycle per day) of the known phenomena causing site deformation contribute to the RLG observable, the Sagnac frequency. We study the impact of solid Earth tides, ocean tidal loading and non-tidal loading phenomena (atmospheric pressure loading and continental hydrosphere loading). Also, we evaluate the differences between available models of the phenomena and the importance of the Love numbers used in modeling the impact of solid Earth tides. Finally, we compare modeled variations in the instrument orientation with the ones observed with a tiltmeter. Our results prove that at the present accuracy of the RLG technique, solid Earth tides and ocean tidal loading effects have significant effect on RLG measurements, and continental hydrosphere loading can be actually neglected. Regarding the atmospheric loading model, its application might introduce some undesired signals. We also show that discrepancies arising from the use of different models can be neglected, and there is almost no impact arising from the use of different Love numbers. Finally, we discuss differences between data reduced with tiltmeter observations and these reduced with modeled signal, and potential causes of this discrepancies.
DOI: 10.1093/gji/ggt415
发表时间: 2014
影响因子: 2.8
作者:
W. Tian
通讯作者: W. Tian
在正规方程水平上结合 VLBI 和环形激光观测
DOI: --
发表时间: 2017
期刊:
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作者:
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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
发表时间: 2017
影响因子: 2
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DOI: --
发表时间: 2003
期刊:
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作者:
K. Schreiber;T. Klügel;G. Stedman
通讯作者: G. Stedman
DOI: 10.1016/j.jog.2012.02.002
发表时间: 2012-12
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