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Attitude Control on GRACE Follow-On: Experiences from the First Years in Orbit

Cossavella, Fabiana und Herman, Jacobus und Hoffmann, Lukas und Fischer, Denis und Save, Himashu und Schlepp, Benjamin und Usbeck, Thomas (2022) Attitude Control on GRACE Follow-On: Experiences from the First Years in Orbit. In: Space Operations: Beyond Boundaries to Human Endeavours Springer Aerospace Technology (SAT). Seiten 493-517. doi: 10.1007/978-3-030-94628-9_22. ISBN 978-3-030-94630-2. ISSN 1869-1730.

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Offizielle URL: https://link.springer.com/chapter/10.1007/978-3-030-94628-9_22

Kurzfassung

The two satellites for the GRACE (Gravity Recovery And Climate Experiment) Follow-On mission were successfully launched in May 2018 into a polar orbit at an altitude of 491 km. Its predecessor GRACE was operated by the same partners from 2002 until 2017). The mission continues the measurements of the gravity field of the Earth (with emphasis on the time variability) and also delivers radio occultation measurements. The twin satellites are kept at a relative distance of 170 to 270 km and act as probes in the gravity field of the Earth. The inter-satellite distance is measured by a microwave tracking system to an accuracy of 1 μm. A laser ranging interferometer is added as a technology demonstration. Stable and accurate relative pointing, as well as the minimization of disturbance torques, is required in order to optimize scientific results. This poses stringent demands upon attitude control. The performance of the GRACE Follow-on attitude control system will be presented, as well as the special actions and changes that became necessary as the mission evolved. A short description of the sensors and actuators used for attitude control is given and improvements with respect to GRACE are discussed in some more detail. The operational modes are described with a focus on the so-called nominal fine-pointing mode, in which the front ends point towards each other in order to enable microwave- and laser-ranging. The third section opens with a description of special tasks, such as the fine-tuning of the control and monitoring parameters and the complex determination of the satellite’s center of gravity. A comparison is made with a tracking model based upon the fuel expenditure from the two tanks that can be determined independently. Several series of involved tests with manual thruster firings were performed in order to characterize the response of the accelerometers to thruster actuations. A description of the design of the tests, their execution and results is presented. A switch to the redundant instrument was made five months after launch on one of the satellites. The consequences for attitude control are discussed in Sect. 4. A method that was developed to cope with a situation where also the redundant GPS receiver would become unavailable is discussed in detail. Conclusions and an outlook for the upcoming years of operations are presented in the last section.

elib-URL des Eintrags:https://elib.dlr.de/192756/
Dokumentart:Beitrag im Sammelband
Titel:Attitude Control on GRACE Follow-On: Experiences from the First Years in Orbit
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Cossavella, FabianaFabiana.Cossavella (at) dlr.dehttps://orcid.org/0000-0003-0565-7522NICHT SPEZIFIZIERT
Herman, JacobusJaap.Herman (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Hoffmann, LukasL.Hoffmann (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Fischer, DenisAirbus Defence And SpaceNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Save, HimashuCSRNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Schlepp, BenjaminBenjamin.Schlepp (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Usbeck, ThomasAirbus Defence and SpaceNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:16 März 2022
Erschienen in:Space Operations: Beyond Boundaries to Human Endeavours
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
DOI:10.1007/978-3-030-94628-9_22
Seitenbereich:Seiten 493-517
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der HerausgeberHerausgeber-ORCID-iDORCID Put Code
Cruzen, CraigNASA Marshall Space Flight CenterNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Schmidhuber, MichaelMichael.Schmidhuber (at) dlr.dehttps://orcid.org/0000-0003-1655-3155NICHT SPEZIFIZIERT
Lee, Young H.NASA Jet Propulsion LaboratoryNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Name der Reihe:Springer Aerospace Technology (SAT)
ISSN:1869-1730
ISBN:978-3-030-94630-2
Status:veröffentlicht
Stichwörter:GRACE-FO, AOCS
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 - Data analysis, instrument characterization GRACE-FO
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Raumflugbetrieb und Astronautentraining > Missionsbetrieb
Hinterlegt von: Cossavella, Fabiana
Hinterlegt am:22 Dez 2022 15:38
Letzte Änderung:17 Mär 2024 03:00

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