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| Titel |
Enhanced spatial resolution of the ocean de-aliasing model - Improved GRACE gravity field time series |
| VerfasserIn |
L. Zenner, I. Bergmann, H. Dobslaw, T. Gruber |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250067760
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| Zusammenfassung |
| Within the de-aliasing process during the calculation of monthly mean GRACE gravity fields, short-term atmospheric and oceanic mass variations as predicted by numerical models are used to correct the GRACE measurements. Our goal is to improve this de-aliasing process, as it appears to be one of the limiting factors of the current GRACE gravity field performance.
In order to reach an optimal modelling of these high-frequent mass variations, we calculated different versions of de-aliasing products by changing input parameters and settings for the de-aliasing process. In particular, we used output from a recent simulation of the Ocean Model for Circulation and Tides (OMCT) that offers enhanced spatial resolution when compared to the model version currently employed in the standard de-aliasing product AOD1B RL04 that is routinely provided together with the GRACE Level-1b datasets.
Within this work, especially K-band range-rate satellite-to-satellite tracking residuals, as an intermediate gravity field result and gravity field solutions based on the enhanced spatial resolution of the ocean model are analyzed. Recent results indicate that the K-band range-rate residuals could be significantly improved (reduced). |
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