EXC-2123 QuantumFrontiers
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Differential Lunar Laser RangingLed by: Prof. Dr.-Ing. habil. Jürgen MüllerTeam:Year: 2021Funding: Germany’s Excellence Strategy – EXC-2123 QuantumFrontiers (DFG), DLR-SIDuration: 2021 - 2022
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Relativistic investigations with LLR dataLed by: Prof. Dr.-Ing. habil. Jürgen MüllerTeam:Year: 2019Funding: Germany’s Excellence Strategy – EXC-2123 QuantumFrontiers (DFG)Duration: 2019 - 2025
CRC 1464 (TerraQ)
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Terrestrial Clock Networks: Fundamental Physics and Applications (CRC 1464, C02)The continuous developments of optical clocks and the long-distance links via fibers, especially within TerraQ, will give access to terrestrial clock networks in practice, which will enable the novel measurement concept of chronometric levelling. From a theoretical perspective, this project will elaborate the rigorous relativistic formalism for clock-based geodesy and assess the effects of approximations in different scenarios. Furthermore, this project will figure out the most promising applications for clock networks in geodesy and fundamental physics.Led by: Prof. Dr.-Ing. Jürgen Müller, Prof. Dr. Claus LämmerzahlTeam:Year: 2021Funding: DFG
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Quantum Gravimetry (CRC 1464, A01)Within TerraQ we aim to establish atom-chip based Quantum Gravimetry with Bose-Einstein condensates (BECs) and explore its potential for mobile gravimetry. Deploying QG-1 (Quantum Gravimeter) with steadily increasing frequency and performance in measurement campaigns for C01, A05 and C05 will allow us to prove the in-field applicability of the associated methods and demonstrate an operation of QG-1 under varying, rough conditions.Led by: Dr. Waldemar Herr, Prof. Dr.-Ing. Jürgen Müller, Prof. Dr. Ernst RaselTeam:Year: 2021Funding: DFG
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New Measurement Concepts with Laser Interferometers (CRC 1464, B01)We will study a new type of optical accelerometer (ACC) and gradiometer, advance Laser Ranging Interferometry (LRI) technology conceptually to enable new satellite constellations, and investigate observations of the angular line-of-sight velocity for gravity field recovery with simulations.Led by: Prof. Dr.-Ing. Jürgen Müller, Dr. Vitali MüllerTeam:Year: 2021Funding: DFGDuration: 2021-2024
Terrestrial Gravimetry
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Quantum Gravimetry (CRC 1464, A01)Within TerraQ we aim to establish atom-chip based Quantum Gravimetry with Bose-Einstein condensates (BECs) and explore its potential for mobile gravimetry. Deploying QG-1 (Quantum Gravimeter) with steadily increasing frequency and performance in measurement campaigns for C01, A05 and C05 will allow us to prove the in-field applicability of the associated methods and demonstrate an operation of QG-1 under varying, rough conditions.Led by: Dr. Waldemar Herr, Prof. Dr.-Ing. Jürgen Müller, Prof. Dr. Ernst RaselTeam:Year: 2021Funding: DFG
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A mobile absolute gravimeter based on atom interferometry for highly accurate point observationsAtom interferometers have demonstrated a high sensitivity to inertial forces. The Gravimetric Atom Interferometer (GAIN), developed at Humboldt-Universität zu Berlin, is a mobile atom interferometer based on interfering ensembles of laser-cooled Rb-87 atoms in an atomic fountain configuration. In the continued development state-of-the-art superconductiong gravimeters and laser-interferometer based absolute gravimeters are used for comparisons with and the characterization of GAIN.Led by: Prof. Dr.-Ing. Jürgen MüllerTeam:Year: 2012Funding: DFG
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© IFE / M. Schilling
Gravity Field and Geoid Modelling
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Quantum-based acceleration measurement on geodesy satellites (Q-BAGS)Collaboration between the Observatoire de Paris Department Systèmes de référence temps-espace (SYRTE) and the Institute of Geodesy (IfE) of Leibniz Universität Hannover (LUH) embedded in the QUANTA research cooperation between Germany and France.Led by: Prof. Dr.-Ing. habil. Jürgen MüllerTeam:Year: 2021Funding: BMWK / DLR e.V. (50WM2181)Duration: 10/2021 - 09/2024
Relativistic Geodesy
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Terrestrial Clock Networks: Fundamental Physics and Applications (CRC 1464, C02)The continuous developments of optical clocks and the long-distance links via fibers, especially within TerraQ, will give access to terrestrial clock networks in practice, which will enable the novel measurement concept of chronometric levelling. From a theoretical perspective, this project will elaborate the rigorous relativistic formalism for clock-based geodesy and assess the effects of approximations in different scenarios. Furthermore, this project will figure out the most promising applications for clock networks in geodesy and fundamental physics.Led by: Prof. Dr.-Ing. Jürgen Müller, Prof. Dr. Claus LämmerzahlTeam:Year: 2021Funding: DFG
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Differential Lunar Laser RangingLed by: Prof. Dr.-Ing. habil. Jürgen MüllerTeam:Year: 2021Funding: Germany’s Excellence Strategy – EXC-2123 QuantumFrontiers (DFG), DLR-SIDuration: 2021 - 2022
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Improved modelling of the Earth-Moon systemLed by: Prof. Dr.-Ing. Jürgen MüllerTeam:Year: 2020Funding: DLR-SIDuration: 2019 - 2022
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Relativistic investigations with LLR dataLed by: Prof. Dr.-Ing. habil. Jürgen MüllerTeam:Year: 2019Funding: Germany’s Excellence Strategy – EXC-2123 QuantumFrontiers (DFG)Duration: 2019 - 2025
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High-performance clock networks and their application in geodesyThe rapid development of optical clocks and frequency transfer techniques provides the opportunity to compare clocks’ frequencies at the uncertainty level of 10-18. This will enable relativistic geodesy with the aimed accuracy of cm in terms of height. Clock networks are thus highly relevant to various geodetic applications, such as the realization of a height reference system and the determination of regional/global gravity fields. In this project, we aim to investigate the potential of high-performance clock networks and quantify their contributions to specific applications through dedicated simulations.Led by: Prof. Dr.-Ing. Jürgen MüllerTeam:Year: 2019Funding: Germany’s Excellence Strategy – EXC-2123 “QuantumFrontiers” (DFG)
Satellite Gravimetry
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New Measurement Concepts with Laser Interferometers (CRC 1464, B01)We will study a new type of optical accelerometer (ACC) and gradiometer, advance Laser Ranging Interferometry (LRI) technology conceptually to enable new satellite constellations, and investigate observations of the angular line-of-sight velocity for gravity field recovery with simulations.Led by: Prof. Dr.-Ing. Jürgen Müller, Dr. Vitali MüllerTeam:Year: 2021Funding: DFGDuration: 2021-2024
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Hybridization of Classic and Quantum Accelerometers for Future Satellite Gravity MissionsUsing cold atom interferometry (CAI) accelerometers in the next generation of satellite gravimetry missions can provide long-term stability and precise measurements of the non-gravitational forces acting on the satellites. This allows for a reduction of systematic effects in current GRACE-FO gravity field solutions. In this project, we first aim to investigate the hybridization of quantum CAI-based and classical accelerometers for a GRACE-like mission and we discusse the performance improvement through dedicated simulations. Then we investigate different orbital configurations and mission concepts to find the optimal setting for future satellite gravimetry missions.Led by: Prof. Dr.-Ing. MüllerTeam:Year: 2020
Lunar Laser Ranging (LLR)
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Differential Lunar Laser RangingLed by: Prof. Dr.-Ing. habil. Jürgen MüllerTeam:Year: 2021Funding: Germany’s Excellence Strategy – EXC-2123 QuantumFrontiers (DFG), DLR-SIDuration: 2021 - 2022
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Improved modelling of the Earth-Moon systemLed by: Prof. Dr.-Ing. Jürgen MüllerTeam:Year: 2020Funding: DLR-SIDuration: 2019 - 2022
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LLR contribution to reference frames and Earth orientation parametersLed by: Prof. Dr.-Ing. Jürgen MüllerTeam:Year: 2019Funding: Germany’s Excellence Strategy – EXC-2123 QuantumFrontiers (DFG), DLR-SIDuration: 2019 - 2025
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Relativistic investigations with LLR dataLed by: Prof. Dr.-Ing. habil. Jürgen MüllerTeam:Year: 2019Funding: Germany’s Excellence Strategy – EXC-2123 QuantumFrontiers (DFG)Duration: 2019 - 2025
