Modelling of Episodic-Transient Signals in Measurements of Large Ring Lasers

大环形激光器测量中的偶发瞬态信号建模

• 批准号: 5456269
• 负责人: Professor Dr.-Ing. Ulrich Schreiber
• 金额: --
• 依托单位: Institut für Meteorologie
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5456269?language=en
• 关键词: Modelling; Episodic; Transient; Signals; Measurements

Ring lasers measure rotations of the observation platform absolute, instantaneously and in high temporary resolution. These properties make ring lasers a promising tool for measuring short term fluctuations in Earth rotation. Modern large ring lasers show a very small drift in observation intervals reaching from only a few minutes up to several days. For the G ring laser in Wettzell we have now achieved a measurement resolution as good as 10-8 of the rotation rate of the Earth. Because of this high instrumental resolution there are not only the expected periodical geophysical signals visible in the timeseries of the measurement. We also start to see non-periodic and transient signals of unidentified origin. One possible cause with local or regional effect could be result of horizontal wind-pressure along geographical structures ¿ in this case the alpine mountain belt in central Europe. A central part of this research proposal therefore is the modeling of horizontal deformations of the Earth crust caused by windload and the effect this will have on our ring laser measurements. The identification of such non-global rotational components is very important for the interpretation of timeseries of large ring lasers with respect to Earth rotation variations.

观察平台绝对，即时和高临时分辨率的环形激光器测量旋转。这些特性使环激光器成为测量地球旋转短期波动的有前途的工具。现代的大环激光器的观察间隔很小，从几分钟到几天。对于Wettzell中的G环激光器，我们现在已经达到了地球旋转速率的10-8的测量分辨率。由于这种高仪器分辨率，不仅在测量时间内看到了预期的周期地球物理信号。我们还开始看到未识别来源的非周期性和瞬态信号。局部或区域效应的一个可能原因可能是沿地理结构的水平风压力的结果。在这种情况下，中欧的高山山带。因此，该研究提案的一个核心部分是由风载引起的地壳水平变形的建模以及对我们的环激光测量的影响。这种非全球旋转成分的鉴定对于在地球旋转变化方面的大型环激光器时间的解释非常重要。

项目成果

A LASER GYROSCOPE SYSTEM TO DETECT THE GRAVITO-MAGNETIC EFFECT ON EARTH

• DOI: 10.1142/s0218271810018360
• 发表时间: 2010-12-01
• 期刊: INTERNATIONAL JOURNAL OF MODERN PHYSICS D
• 影响因子: 2.2
• 作者: Di Virgilio, A.;Schreiber, K. U.;Ortolan, A.
• 通讯作者: Ortolan, A.

Self-locked operation of large He–Ne ring laser gyroscopes

大型HeâNe环激光陀螺仪的自锁操作

• DOI: 10.1088/0026-1394/49/3/209
• 期刊: Metrologia
• 影响因子: 2.4
• 作者: Holdaway;Graham;Rabeendran;Schreiber;J.-P. R.
• 通讯作者: J.-P. R.

Can we estimate local Love wave dispersion properties from collocated amplitude measurements of translations and rotations?

• DOI: 10.1029/2009gl042215
• 发表时间: 2010-02-25
• 期刊: GEOPHYSICAL RESEARCH LETTERS
• 影响因子: 5.2
• 作者: Kurrle, Dieter;Igel, Heiner;Schreiber, Ulrich
• 通讯作者: Schreiber, Ulrich

How to detect the Chandler and the annual wobble of the Earth with a large ring laser gyroscope.

• DOI: 10.1103/physrevlett.107.173904
• 发表时间: 2011-10
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: K. Schreiber;T. Klügel;J. Wells;R. Hurst;A. Gebauer

High-frequency noise caused by wind in large ring laser gyroscope data

大环激光陀螺仪数据中风引起的高频噪声

• DOI: 10.1007/s10950-012-9283-x
• 期刊: Journal of Seismology
• 影响因子: 1.6
• 作者: Gebauer;Schreiber;Klügel;Schön;Ulbrich
• 通讯作者: Ulbrich