Gravity Field Solution by Exploiting the Full Potential of GRACE Follow-On (C04)

• Subject Area: Geodesy, Photogrammetry, Remote Sensing, Geoinformatics, Cartography
• Term: since 2021
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 434617780

GRACE-FO provides inter-satellite range observations with unprecedented precision due to the new laser-ranging interferometer (LRI) which is expected to finally yield an improvement of a factor 5 to 50 compared to GRACE. This project focuses on exploiting the potential of the LRI-system for gravity field recovery. We will continue to improve the stochastic modelling and will augment the equation system for additional ocean-tide parameters to be estimated in a combined gravimetry/altimetry adjustment. In parallel, we will explore the so-called extended acceleration approach, which adds two condition equations to the standard low-low satellite-to-satellite equation.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 1464: Relativistic and quantum-based geodesy (TerraQ)
• International Connection: Austria
• Applicant Institution: Gottfried Wilhelm Leibniz Universität Hannover
• Co-Applicant Institution: Technische Universität Graz
• Project Heads: Professor Dr.-Ing. Torsten Mayer-Gürr; Dr.-Ing. Matthias Weigelt