Signal contents of combined monthly gravity field models derived from Swarm GPS data

de Teixeira da Encarncao, Joao; Visser, Pieter; Doornbos, Eelco; van den IJssel, Jose; Mao, Xinyoan; Iorfida, Elisabetta; Arnold, Daniel; Jäggi, Adrian; Meyer, Ulrich; Bezdek, Ales; Sebera, Josef; Klokocnik, Jaroslav; Ellmer, Matthias; Mayer-Gürr, Torsten; Zehentner, Norbert; Guo, Junyi; Luk, Peter; Shum, C.K.; Zhang, Yu (April 2018). Signal contents of combined monthly gravity field models derived from Swarm GPS data (Unpublished). In: EGU General Assembly 2018. Vienna, Austria. 08-13 April, 2018.

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The Swarm satellite constellation?s GPS receivers provide valuable gravimetric data, with which it is possible to observe Earth?s large-scale mass transport process. These data have become increasingly relevant given the on-going GRACE/GRACE-FO gap, and are thus needed to provide continuous observations of the Earth system. In this context, the overall accuracy and maximum resolution of the Swarm temporal gravity field models are parameters with interest to the wider geophysical community. We assess the signal contents of the gravity field model resulting from the combination at the solution level of four individual solutions produced considering different gravity field estimation approaches. The combination considers Variance Component Estimation (VCE) and is a service kindly provided by the European Gravity Service for Improved Emergency Management (EGSIEM) initiative. We assume that past GRACE solutions provide an accurate measure of the signal at the spatial lengths captured by the Swarm solutions. On the basis of this, we derive per-degree correlation coefficients and spatial correlation maps for a selection of monthly solutions that were obtained under diverse conditions of geomagnetic and ionospheric activities, as well as variability of non-gravitational accelerations.

Item Type:

Conference or Workshop Item (Speech)

Division/Institute:

08 Faculty of Science > Institute of Astronomy

UniBE Contributor:

Arnold, Daniel and Meyer, Ulrich

Subjects:

500 Science > 520 Astronomy

Language:

English

Submitter:

Pierre Fridez

Date Deposited:

14 May 2018 16:29

Last Modified:

26 Oct 2019 22:52

Additional Information:

Presentation

BORIS DOI:

10.7892/boris.116383

URI:

https://boris.unibe.ch/id/eprint/116383

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