The EGSIEM combination service: final results and further plans

Ulrich Meyer, Andreas Kvas, Torsten Mayer-Gürr, Jean-Michel Lemoine, Stéphane Bourgogne, Christoph Dahle, Frank Flechtner, Yoomin Jean, Daniel Arnold, Adrian Jäggi

Research output: Contribution to conferencePoster

Abstract

The EU-funded phase of the Horizon 2020 project European Gravity Service for Improved Emergency management
(EGSIEM) has been completed. We present the final combined products that were generated after three years
of development and test-operations of the scientific combination service for GRACE monthly gravity fields. The
combined time-series is compared to the official GRACE science data system gravity fields and validated in terms
of signal and noise content in the spatial and spectral domains. We review the combination strategy on normal equation
level, monitor the relative weights derived by variance component estimation on solution level and introduce
the user-friendly gridded and smoothed products derived from the spherical harmonic gravity field coefficients.
Finally, we discuss the future perspective of the service, which is in transition to become a combination center of
the international association of geodesy (IAG) under the umbrella of the international gravity field service (IGFS).
Original languageEnglish
Publication statusPublished - 12 Apr 2018
EventEGU General Assembly 2018 - Wien, Austria
Duration: 9 Apr 201813 Apr 2018

Conference

ConferenceEGU General Assembly 2018
CountryAustria
CityWien
Period9/04/1813/04/18

Keywords

  • GRACE
  • Combination

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