Omega-E: Establishing the instantaneous Earth rotation vector by inertial rotation sensing

Omega-E：通过惯性旋转传感建立瞬时地球旋转矢量

• 批准号: 393259684
• 负责人: Dr. André Gebauer
• 金额: --
• 依托单位: Bundesamt für Kartographie und Geodäsie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/393259684?language=en
• 关键词: Omega; Establishing; instantaneous; Earth; rotation

Operations of the large G ring laser have improved to the point that Earth rotation can be routinely monitored at the level 5*10-9 < 'Earth rotation changes' < 10-8. Unfortunately this is only a single component gyroscope. With the construction of the ROMY ring laser it was possible to build the first large 4 component optical gyroscope for applications in seismology and space geodesy. The scale factor of ROMY is two times larger than that of the G ring laser and it has been constructed as a heterolithic structure. This research proposal attempts to operate the ROMY structure phase locked in a weak multimode regime in order to stabilize the cavity sufficiently to observe diurnal retro-grade polar motion. This signal is not directly detectable with the geometric techniques of space geodesy such as GNSS, SLR and VLBI. The development of suitable models for the geophysical processes causing this signal is another important part of this research proposal as well as the appropriate fusion of ring laser observations with measurements of VLBI and GNSS. The comparison between the G ring laser and ROMY structure finally helps to distinguish local from global rotation.

大型G环激光器的操作已经改进到可以在5*10-9 <“地球自转变化”< 10-8的水平上对地球自转进行常规监测。不幸的是，这只是一个单组件陀螺仪。随着ROMY环形激光器的建造，有可能建造第一个用于地震学和空间大地测量学的大型4分量光学陀螺仪。ROMY的标度因子比G环激光器的标度因子大两倍，并且它被构造为异质结构。本研究建议尝试在弱多模状态下操作ROMY结构相位锁定，以充分稳定空腔来观测昼夜逆行极移。这一信号无法用全球导航卫星系统、SLR和VLBI等空间大地测量几何技术直接探测到。为产生这一信号的地球物理过程建立适当的模型以及将环形激光观测结果与VLBI和全球导航卫星系统的测量结果适当融合是本研究建议的另一个重要部分。G环激光器和ROMY结构之间的比较最终有助于区分局部旋转和全局旋转。

项目成果

Gyroscopic performance and some seismic measurements made with a 10 meter perimeter ring laser gyro housed in the Ernest Rutherford building.

使用欧内斯特·卢瑟福大楼内的 10 米周长环形激光陀螺仪进行陀螺仪性能和一些地震测量

• DOI: 10.1364/ao.414897
• 期刊: Applied optics
• 影响因子: 1.9
• 作者: Thirkettle;Gebauer;MacDonald;Schreiber;J.-P. R.
• 通讯作者: J.-P. R.

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

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
• 期刊: Pure and Applied Geophysics
• 影响因子: 2
• 作者: Tercjak;Gebauer;Rajner;Brzeziński;Schreiber
• 通讯作者: Schreiber