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Gravity field recovery process of GRACE-like systems with conditional equations

Authors

Ebadi,  Sahar
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Weigelt,  Matthias
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Mayer-Gürr,  Torsten
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Öhlinger,  Felix
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Ebadi, S., Weigelt, M., Mayer-Gürr, T., Öhlinger, F. (2023): Gravity field recovery process of GRACE-like systems with conditional equations, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3211


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020358
Abstract
Intersatellite ranging systems as implemented in the GRACE and GRACE-FO mission are considered one-dimensional observation systems. The intersatellite range is observed in the direction of the line-of-sight between the two satellite. In the modelling process, range-rate and range-accelerations are typically connected to the relative position and velocity projected on the line-of-sight, respectively. We investigate the possibility of adding conditional equations in directions perpendicular to the line-of-sight and present gravity field solutions developed at the Leibniz University Hannover using GRACE and GRACE Follow-On range-rate and range-accelerations as observations. We will show the mathematical derivations and investigates the feasibility of using these additional directions in the gravity field recovery process.