Towards a new release of the ITSG-Grace gravity field solutions: New investigations and first results
- Graz University of Technology, Institute of Geodesy, Department Satellite Geodesy, Austria (felix.oehlinger@tugraz.at)
The Institute of Geodesy of the Graz University of Technology produces high quality GRACE/GRACE-FO gravity fields using an in-house developed software, the Gravity Recovery Object Oriented Programming System (GROOPS). We are currently working on a new release which will be based on the reprocessed Level-1A Release 05 Grace data the AOD1B Release 07 dealiasing product covering the complete GRACE/GRACE-FO time-span. Like its predecessor (ITSG-Grace2018) the new release will include a static field, unconstrained monthly, as well as Kalman smoothed daily solutions.
New investigations and improvements comprise: (a) A revision of the Level 1a to Level 1b processing focusing on the determination of the accelerometer transplant.
(b) Updated background models which include an improved model of the thermosphere with higher temporal resolution as well as an optimized tide model.
(c) The inclusion of LRI measurements in the gravity field recovery using optimal weighting achieved through stochastic modeling.
How to cite: Öhlinger, F., Mayer-Gürr, T., Kvas, A., Krauss, S., Süsser-Rechberger, B., and Dumitraschkewitz, P.: Towards a new release of the ITSG-Grace gravity field solutions: New investigations and first results, GRACE/GRACE-FO Science Team Meeting 2022, Potsdam, Germany, 18–20 Oct 2022, GSTM2022-41, https://doi.org/10.5194/gstm2022-41, 2022.
