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Sensor and performance modelling of an optical accelerometer for future gravity field missions

Kupriyanov, Alexey und Reis, Arthur und Schilling, Manuel und Müller, Vitali und Müller, Jürgen (2022) Sensor and performance modelling of an optical accelerometer for future gravity field missions. EGU General Assembly 2022, 2022-05-23 - 2022-05-27, Wien, Österreich. doi: 10.5194/egusphere-egu22-2023.

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Offizielle URL: https://meetingorganizer.copernicus.org/EGU22/EGU22-2023.html

Kurzfassung

Electrostatic accelerometers (EA) are one of the limiting factors of space gravimetry missions dominating the error contribution at low frequencies (<10e-3Hz). The focus of this study is on the modelling of an optical accelerometer that can improve gravity field retrieval to unprecedented accuracy. Contrary to GRACE(-FO) or GOCE accelerometers, optical accelerometers sense the motion of the test mass (TM) in one or more axes by applying laser interferometry. Combination of sensing in multiple directions and of several test masses would lead to enhanced gradiometry which would improve the determination of the static gravity field to a higher spatial resolution. Modelling of the above-mentioned accelerometer blocks in Matlab Simulink allows to simulate various TM measurement scenarios for satellite missions under different conditions, e.g. dedicated satellite configurations, various non-gravitational forces, etc. This research is based on very promising results of the mission LISA-Pathfinder (LPF) which has demonstrated the benefit of a drag-free system in combination with optical accelerometry that allowed sensing of non-gravitational accelerations several orders of magnitude more accurate than those of current gravity missions like GRACE-FO. This research project is carried out in close collaboration with the IGP and the DLR-SI, to provide - on the long run - a roadmap for improved angular and linear accelerometry for the next generation of gravity field missions. In this presentation, we now introduce a functional model of 6 degrees-of-freedom (DoF) optical accelerometer and compare its output with the measurements of electrostatic accelerometers for the dual satellite configuration, i.e. GRACE-FO mission. Also, the current state of the Simulink implementation of the accelerometer model which are mainly developed by IGP are presented. Finally, the simulated gravity gradients from the novel gradiometer based on the optical accelerometers are demonstrated as well as benefits that can be acquired from this sensor.

elib-URL des Eintrags:https://elib.dlr.de/186576/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Sensor and performance modelling of an optical accelerometer for future gravity field missions
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Kupriyanov, AlexeyInstitut für Erdmessung, Leibniz Universität Hannover, Germanyhttps://orcid.org/0000-0002-0743-5889NICHT SPEZIFIZIERT
Reis, ArthurMax Planck Institute for Gravitational Physics, Hannoverhttps://orcid.org/0000-0002-6682-5457NICHT SPEZIFIZIERT
Schilling, ManuelManuel.Schilling (at) dlr.dehttps://orcid.org/0000-0002-9677-0119NICHT SPEZIFIZIERT
Müller, VitaliMax-Planck-Institut, HannoverNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Müller, JürgenInstitut für Erdmessung, Leibniz Universität Hannover, Germanyhttps://orcid.org/0000-0003-1247-9525NICHT SPEZIFIZIERT
Datum:2022
Referierte Publikation:Nein
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
DOI:10.5194/egusphere-egu22-2023
Status:veröffentlicht
Stichwörter:gravity field, accelerometer, GRACE-FO, NGGM
Veranstaltungstitel:EGU General Assembly 2022
Veranstaltungsort:Wien, Österreich
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:23 Mai 2022
Veranstaltungsende:27 Mai 2022
Veranstalter :European Geosciences Union
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Kommunikation, Navigation, Quantentechnologien
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R KNQ - Kommunikation, Navigation, Quantentechnologie
DLR - Teilgebiet (Projekt, Vorhaben):R - Inertial Sensing for Space Applications
Standort: Hannover
Institute & Einrichtungen:Institut für Satellitengeodäsie und Inertialsensorik > Satellitengeodäsie und geodätische Modellierung
Hinterlegt von: Schilling, Manuel
Hinterlegt am:13 Jun 2022 08:49
Letzte Änderung:24 Apr 2024 20:47

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