Hauk, Markus und Wilms, Josefine und Sulzbach, Roman und Panafidina, Natalia und Hart-Davis, Michael und Dahle, Christoph und Müller, Vitali und Murböck, Michael und Flechtner, Frank (2023) Satellite Gravity Field Recovery Using Variance-Covariance Information From Ocean Tide Models. Earth and Space Science, 10 (10). American Geophysical Union (AGU). doi: 10.1029/2023EA003098. ISSN 2333-5084.
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Offizielle URL: https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023EA003098
Kurzfassung
Monthly gravity field recovery using data from the GRACE and GRACE Follow-On missions includes errors limiting the spatial and temporal resolution of the estimated gravity fields. The major error contributions, besides the noise of the accelerometer instruments, arise from temporal aliasing errors due to imperfections in the non-tidal atmospheric and oceanic de-aliasing models and ocean tide models. We derive uncertainty information for the eight major tidal constituents from five different ocean tide models and introduce it into the gravity field recovery process in terms of a constrained normal equation system while expanding the parameter space by additional tidal parameters to be adjusted. We prove the effectiveness of the ocean tide variance-covariance information through realistic simulations and we assess its potential based on microwave and laser interferometer observations from the GRACE Follow-On mission. We show that errors are reduced by more than 20% ocean wRMS for a Gaussian filter radius of 300 km if uncertainty information for ocean tides is considered and stochastic modeling of instrument errors is applied, compared to the latest GFZ release 6.1. Our results also show the limited visibility of the effectiveness of the ocean tide variance-covariance information due to the dominating error contribution of non-tidal atmospheric and oceanic mass variations. Additionally, we investigate the option of estimating ocean tide parameters over a 1-year period while including ocean tide uncertainty information in order to improve ocean tide background modeling.
elib-URL des Eintrags: | https://elib.dlr.de/200746/ | ||||||||||||||||||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||||||||||||||||||
Titel: | Satellite Gravity Field Recovery Using Variance-Covariance Information From Ocean Tide Models | ||||||||||||||||||||||||||||||||||||||||
Autoren: |
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Datum: | 12 Oktober 2023 | ||||||||||||||||||||||||||||||||||||||||
Erschienen in: | Earth and Space Science | ||||||||||||||||||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||||||||||||||||||
Gold Open Access: | Ja | ||||||||||||||||||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||||||||||||||||||
Band: | 10 | ||||||||||||||||||||||||||||||||||||||||
DOI: | 10.1029/2023EA003098 | ||||||||||||||||||||||||||||||||||||||||
Verlag: | American Geophysical Union (AGU) | ||||||||||||||||||||||||||||||||||||||||
ISSN: | 2333-5084 | ||||||||||||||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||||||||||||||
Stichwörter: | Application of variance-covariance information from ocean tide models in Level-2 satellite gravity field processing Reduction of temporal aliasing errors due to ocean tides in time-varying gravity field solutions Estimation of ocean tide parameters for an improved ocean tide background modeling | ||||||||||||||||||||||||||||||||||||||||
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: | Hannover | ||||||||||||||||||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Satellitengeodäsie und Inertialsensorik > Quantenoptische Sensorik | ||||||||||||||||||||||||||||||||||||||||
Hinterlegt von: | Koch, Alexander | ||||||||||||||||||||||||||||||||||||||||
Hinterlegt am: | 11 Dez 2023 15:44 | ||||||||||||||||||||||||||||||||||||||||
Letzte Änderung: | 29 Jan 2024 12:52 |
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