Aktualisierung und Verbesserung des ESA Erdsystemmodells
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Duration: 01-12-2013 - 30-06-2014
The realistic assessment of candidate constellations for a future satellite gravity mission dedicated to the observation of large-scale mass transport phenomena requires extensive end-to-end simulations: starting from simulated orbits based on a realistic global model of large-scale mass redistributions that cause time-changes in the gravity field all the way down to the retrieval of global gravity field solutions and the application of appropriate post-processing techniques to remove spatially anisotropic errors. Critically important prerequisites for such simulations are (i) a model of the time-variable gravity field of the Earth that contains realistic variability on a wide range of spatial and temporal scales important for satellite gravimetry, and (ii) corresponding background models for the gravity field retrieval process to cope with high-frequency mass variability that otherwise aliases into the time-mean gravity fields. Those background models are to be derived from the source models by augmenting them with realistic errors that are correlated in time and space.
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Publications
Dobslaw, H., Bergmann, I., Dill, R., Forootan, E., Klemann, V., Kusche, J., Sasgen, I.(2015): The updated ESA Earth System Model for future gravity mission simulation studies. - Journal of Geodesy, 89, 5, p. 505-513.
Dobslaw, H., Bergmann-Wolf, I., Forootan, E., Dahle, C., Mayer-Gürr, T., Kusche, J., Flechtner, F.(2016): Modeling of present-day atmosphere and ocean non-tidal de-aliasing errors for future gravity mission simulations. - Journal of Geodesy, 90, 5, p. 423-436.