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Decorrelation of GRACE Time Variable Gravity Field Solutions Using Full Covariance Information
Open AccessArticle

GRACETOOLS—GRACE Gravity Field Recovery Tools

1
Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Leibniz Universität Hannover, Callinstrasse 36, 30167 Hannover, Germany
2
Center of Applied Space Technology and Microgravity (ZARM), University of Bremen, 28359 Bremen, Germany
3
Institut für Erdmessung, Leibniz Universität Hannover, Schneiderberg 50, 30167 Hannover, Germany
4
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA
5
Institut für Erdmessung, Leibniz Universität Hannover, Schneiderberg 50, 30167 Hannover, Germany
*
Author to whom correspondence should be addressed.
Geosciences 2018, 8(9), 350; https://doi.org/10.3390/geosciences8090350
Received: 13 July 2018 / Revised: 13 August 2018 / Accepted: 31 August 2018 / Published: 15 September 2018
(This article belongs to the Special Issue Gravity Field Determination and Its Temporal Variation)
This paper introduces GRACETOOLS, the first open source gravity field recovery tool using GRACE type satellite observations. Our aim is to initiate an open source GRACE data analysis platform, where the existing algorithms and codes for working with GRACE data are shared and improved. We describe the first release of GRACETOOLS that includes solving variational equations for gravity field recovery using GRACE range rate observations. All mathematical models are presented in a matrix format, with emphasis on state transition matrix, followed by details of the batch least squares algorithm. At the end, we demonstrate how GRACETOOLS works with simulated GRACE type observations. The first release of GRACETOOLS consist of all MATLAB M-files and is publicly available at Supplementary Materials. View Full-Text
Keywords: GRACE; gravity field recovery; variational equations GRACE; gravity field recovery; variational equations
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Darbeheshti, N.; Wöske, F.; Weigelt, M.; Mccullough, C.; Wu, H. GRACETOOLS—GRACE Gravity Field Recovery Tools. Geosciences 2018, 8, 350.

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