SFB 1128: Relativistic Geodesy and Gravimetry with Quantum Sensors - Modelling, Geo-Metrology and Future Technology (geo-Q)

SFB 1128：使用量子传感器的相对论大地测量和重力测量 - 建模、地理计量和未来技术 (geo-Q)

• 批准号: 239994235
• 金额: --
• 依托单位: Gottfried Wilhelm Leibniz Universität Hannover
• 依托单位国家: 德国
• 项目类别: Collaborative Research Centres
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/239994235?language=en
• 关键词: SFB; 1128; Relativistic; Geodesy; Gravimetry

Spatial and temporal variations of the Earth’s gravitational field allow unique ways to detect and quantify processes of change in the Earth system and to monitor contributions related to climate change. Gravitational data enable the direct quantification of mass changes, such as the present mass loss of the polar ice sheets, the mass component of sea level rise, and changes in the large and small-scale water cycle. However, the gravitational signals obtained from current satellite measurements do not have the resolution and accuracy to reliably identify the causes, mechanisms, and interactions of the processes.The goal of geo-Q is to explore new frontiers of the determination of the gravitational field based on revolutionary quantum sensors and modelling methods from Einstein’s theory of General Relativity. geo-Q will investigate three central components of integrated gravity modelling and develop three fundamentally new geodetic measurement techniques:1.Laser interferometry for ranging between satellites at the nanometer level of precision. Future satellite gravimetry with such sensors will achieve – through gravitational signals – a global and continuous monitoring of mass changes with a ten times improved accuracy and two times better spatial resolution (200 km or better).2.Rapid and compact atomic gravity sensors for terrestrial measurement campaigns to achieve a local recovery of mass change beyond the limit of resolution of satellite techniques.3.Ultra-precise optical atomic clocks for the determination of the gravitational potential from relativistic gravitational frequency redshift. This becomes possible due to the extreme accuracy of today’s clock metrology, and it opens new perspectives to establish a future fundamental reference for gravitational measurements and a globally homogeneous height reference.The integration of the three components will be unique worldwide. In the first funding period we have laid the foundations that we will now apply to real measurements in the field. We will employ our atomic quantum gravimeter for measurement campaigns in northern Germany. After the launch of the GRACE Follow-on mission in early 2018, we will now analyse real data instead of the simulated data that we practiced on in the first period. New compact accelerometers and mobile clocks will facilitate mobile campaigns. And after first tests in the first period, we will now conduct relativistic height measurement campaigns with clock networks.

地球引力场的时空变化提供了独特的方法来探测和量化地球系统的变化过程，并监测与气候变化有关的贡献。重力数据可以直接量化质量变化，例如目前极地冰盖的质量损失、海平面上升的质量成分以及大、小规模水循环的变化。然而，从目前的卫星测量中获得的重力信号不具备可靠地确定这些过程的原因、机制和相互作用的分辨率和准确性。geo-Q的目标是基于革命性的量子传感器和爱因斯坦广义相对论的建模方法，探索确定引力场的新领域。geo-Q将研究综合重力建模的三个核心组成部分，并开发三种全新的大地测量技术：用于卫星间纳米级精度测距的激光干涉测量。未来带有这种传感器的卫星重力测量将通过重力信号实现对质量变化的全球连续监测，其精度提高10倍，空间分辨率提高2倍（200公里或更高）。2 .用于地面测量活动的快速紧凑型原子重力传感器，以实现超出卫星技术分辨率限制的质量变化的局部恢复。用于从相对论引力频率红移测定引力势的超精密光学原子钟。由于当今时钟计量的极端精度，这成为可能，它为建立未来引力测量的基本参考和全球均匀的高度参考开辟了新的视角。这三个组成部分的整合将是全球独一无二的。在第一个资助期，我们奠定了基础，现在我们将把这些基础应用于实地的实际测量。我们将在德国北部使用原子量子重力仪进行测量活动。在2018年初GRACE后续任务发射后，我们现在将分析真实数据，而不是我们在第一期练习的模拟数据。新的紧凑型加速度计和移动时钟将促进移动活动。在第一阶段的第一次测试之后，我们现在将用时钟网络进行相对论高度测量活动。

项目成果

Compact Multifringe Interferometry with Subpicometer Precision

• DOI: 10.1103/physrevapplied.12.034025
• 发表时间: 2019-09-13
• 期刊: PHYSICAL REVIEW APPLIED
• 影响因子: 4.6
• 作者: Isleif, Katharina-Sophie;Heinzel, Gerhard;Gerberding, Oliver
• 通讯作者: Gerberding, Oliver

Gravitational clock compass in general relativity

广义相对论中的引力钟罗盘

• DOI: 10.1103/physrevd.98.024032
• 发表时间: 2018
• 期刊: Physical Review D
• 影响因子: 5
• 作者: Puetzfeld D;Obukhov Y. N.;Lämmerzahl C.
• 通讯作者: Lämmerzahl C.

A comparison of fixed- and free-positioned point mass methods for regional gravity field modeling

• DOI: 10.1016/j.jog.2019.01.001
• 发表时间: 2019-04
• 期刊: Journal of Geodynamics
• 影响因子: 2.3
• 作者: Miao Lin;H. Denker;Jürgen Müller

Atomic source selection in space-borne gravitational wave detection

• DOI: 10.1088/1367-2630/ab22d0
• 发表时间: 2018-12
• 期刊: New Journal of Physics
• 影响因子: 3.3
• 作者: S. Loriani;D. Schlippert;C. Schubert;S. Abend;H. Ahlers;W. Ertmer;Jan Rudolph;J. Hogan;M. Kasevich;E. Rasel;N. Gaaloul

Towards the LISA backlink: experiment design for comparing optical phase reference distribution systems

• DOI: 10.1088/1361-6382/aaa879
• 发表时间: 2018-04-26
• 期刊: CLASSICAL AND QUANTUM GRAVITY
• 影响因子: 3.5
• 作者: Isleif, Katharina-Sophie;Bischof, Lea;Heinzel, Gerhard
• 通讯作者: Heinzel, Gerhard