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2014 | OriginalPaper | Buchkapitel

A Closed-Loop Simulation on Regional Modelling of Gravity Changes from GRACE

verfasst von : Katrin Bentel, Christian Gerlach

Erschienen in: Earth on the Edge: Science for a Sustainable Planet

Verlag: Springer Berlin Heidelberg

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Abstract

A closed-loop simulation is set up in order to study in detail regional gravity modelling from GRACE-type observations. Thereby, potential differences between two satellites are simulated from a pre-defined mass trend signal, superimposed to a static background gravity model. These simulated observations are used for regional gravity field analysis with spherical radial basis functions. Finally, we use EOF analysis to identify the trend in gravity potential from a time series of 15-days quasi-static snapshots. Regional gravity modelling on the sphere is fairly complex and introduces approximation errors and artificial effects. In order not to mix up these errors with noise from the observations, we currently use noise-free observations. The model provides a versatile tool for detailed investigation of the data analysis method. Validation of the results is performed by comparison of input and output gravity change.

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Titel: A Closed-Loop Simulation on Regional Modelling of Gravity Changes from GRACE
verfasst von: Katrin Bentel
Christian Gerlach
Verlag: Springer Berlin Heidelberg
Buch: Earth on the Edge: Science for a Sustainable Planet
Print ISBN: 978-3-642-37221-6

Electronic ISBN: 978-3-642-37222-3

Copyright-Jahr: 2014
DOI: https://doi.org/10.1007/978-3-642-37222-3_11