Modern Concepts for Ground and Space Observations of the Earth Gravity Field
Convener:
Marvin Reich
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Co-conveners:
Jürgen Müller,
Daniele Carbone,
Elske de Zeeuw - van Dalfsen,
Sébastien Merlet
Orals
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Thu, 18 Apr, 14:00–15:45 (CEST) Room D1
Posters on site
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Attendance Fri, 19 Apr, 10:45–12:30 (CEST) | Display Fri, 19 Apr, 08:30–12:30 Hall X2
We encourage the dissemination of results from geoscience applications of absolute quantum gravimeters, which are gradually replacing devices based on the free-fall of corner cubes, since they allow nearly continuous absolute gravity measurements and offer the possibility to measure the gravity gradient. Quantum sensors are also increasingly considered for future gravity space missions. In addition, we welcome results from gravimeters based on other technologies (e.g., MEMS or superconducting gravimeters) that have been used to study the redistributions of subsurface fluid masses (water, magma, hydrocarbons, etc.) in permanent deployment or field surveys.
Besides gravimeters, other concepts can provide unique information on the Earth’s gravity field. According to Einstein’s theory of general relativity, frequency comparisons of highly precise optical clocks connected by optical links give direct access to differences of the gravity potential (relativistic geodesy) over long baselines. In future, precise optical clock networks can be applied for defining and realizing a new international height system or to monitor mass variations.
Laser interferometry between test masses in space with nanometer accuracy – successfully demonstrated through the GRACE-FO mission – also belongs to these novel concepts, and even more refined concepts (tracking swarms of satellites, space gradiometry) will be realized in the near future.
We invite presentations illustrating the state of the art of those novel techniques, that will open the door to a vast bundle of applications, including the gravimetric observation of the Earth-Moon system with high spatial-temporal resolution as well as the assessment of terrestrial mass redistributions, occurring at different space and time scales and providing unique information on the processes behind, e.g., climate change and volcanic activity.
This session is organized jointly with the IAG (International Association of Geodesy) project "Novel Sensors and Quantum Technology for Geodesy (QuGe)" and DFG Collaborative Research Centre “Relativistic and quantum-based geodesy (TerraQ)”.
14:00–14:05
5-minute convener introduction
14:05–14:25
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EGU24-19937
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solicited
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Highlight
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On-site presentation
14:25–14:35
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EGU24-11177
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ECS
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On-site presentation
14:35–14:45
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EGU24-17378
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ECS
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On-site presentation
14:45–14:55
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EGU24-9463
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ECS
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On-site presentation
15:05–15:15
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EGU24-20659
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On-site presentation
15:15–15:25
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EGU24-10880
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On-site presentation
15:25–15:35
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EGU24-19218
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ECS
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On-site presentation
X2.29
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EGU24-14722
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Highlight
X2.31
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EGU24-17336
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ECS
X2.36
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EGU24-15065
Assessment of different temporal clock-network solution strategies
(withdrawn after no-show)
X2.38
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EGU24-7350
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ECS