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Gravity field modelling for the Hannover 10 m atom interferometer

Schilling, Manuel and Wodey, Étienne and Timmen, Ludger and Tell, Dorothee and Zipfel, Klaus and Schlippert, Dennis and Schubert, Christian and Rasel, Ernst and Müller, Jürgen (2020) Gravity field modelling for the Hannover 10 m atom interferometer. Frontiers of Geodetic Science 2020, 14.10.2020, Online.

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Abstract

Stable gravimetric measurements over timescales from several days to decades are required to provide relevant insight into geophysical processes or to realise a gravimetric reference frame. Users of absolute gravimeters participate in CIPM or RMO key comparisons with a metrological reference in order to monitor the temporal stability of the instruments and determine the bias to that reference. These comparisons provide the reference values of highest accuracy, around 10 nm/s², compared to the calibration against a single gravimeter operated at a metrological institute. The construction of stationary, large scale atom interferometers paves the way towards a new measurement standard in absolute gravimetry used as a reference with a potential stability better than 1 nm/s² at 1 second integration time. At the Leibniz University Hannover, we are currently building such a very long baseline atom interferometer with a 10 m high vertical free fall zone. Additionally, a 3D model of the instrument and its environment is adapted to derive the change of gravity due to the setup of the instrument. The model is then compared to episodic gravimetric measurements. The knowledge of local gravity and its gradient along and around the baseline is required to establish the instrument's uncertainty budget and enable transfers of gravimetric measurements to nearby devices for comparison and calibration purposes. We report on the progress of the gravimetric measurements and modelling of g inside and near the instrument in parallel to the construction of the atom interferometer.

Item URL in elib:https://elib.dlr.de/136770/
Document Type:Conference or Workshop Item (Speech)
Title:Gravity field modelling for the Hannover 10 m atom interferometer
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schilling, ManuelManuel.Schilling (at) dlr.dehttps://orcid.org/0000-0002-9677-0119
Wodey, ÉtienneInstitut für Quantenoptik, Leibniz Universität Hannover, Germanyhttps://orcid.org/0000-0001-9522-8558
Timmen, LudgerInstitut für Erdmessung, Leibniz Universität Hannover, Germanyhttps://orcid.org/0000-0003-2334-5282
Tell, DorotheeInstitut für Quantenoptik, Leibniz Universität Hannover, Germanyhttps://orcid.org/0000-0002-2793-7982
Zipfel, KlausInstitut für Quantenoptik, Leibniz Universität Hannover, Germanyhttps://orcid.org/0000-0002-3135-1247
Schlippert, DennisIQO, Uni Hannoverhttps://orcid.org/0000-0003-2168-1776
Schubert, ChristianChristian.Schubert (at) dlr.deUNSPECIFIED
Rasel, ErnstLUH, Leibniz University of HannoverUNSPECIFIED
Müller, JürgenInstitut für Erdmessung, Leibniz Universität Hannover, Germanyhttps://orcid.org/0000-0003-1247-9525
Date:14 October 2020
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:atom interferometry, gravity acceleration, absolute gravimetry, gravimeter reference
Event Title:Frontiers of Geodetic Science 2020
Event Location:Online
Event Type:national Conference
Event Dates:14.10.2020
Organizer:AK7 "Experimentelle, Angewandte und Theoretische Geodäsie" des DVW
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:other
DLR - Research area:Raumfahrt
DLR - Program:R - no assignment
DLR - Research theme (Project):R - no assignment
Location: Hannover
Institutes and Institutions:Institute for Satellite Geodesy and Inertial Sensing > Satellite Geodesy and Geodetic Modelling
Institute for Satellite Geodesy and Inertial Sensing > Quantum Sensing
Deposited By: Schilling, Manuel
Deposited On:14 Dec 2020 11:55
Last Modified:14 Dec 2020 11:55

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