GOCO06s – a satellite-only global gravity field model

Abstract. GOCO06s is the latest satellite-only global gravity field model computed by GOCO (Gravity Observation Combination) project. It based on over a billion observations acquired 15 years from 19 satellites with different complementary observation principles. This combination of measurement techniques key in providing consistently high accuracy and best possible spatial resolution Earth's field. The motivation for new release was availability reprocessed data Gravity Recovery Climate Experiment (GRACE) steady-state Ocean Circulation Explorer (GOCE), updated background models, substantial improvements processing chains individual contributions. Due to long period, consists not only static field, but comprises additionally modeled temporal variations. These are represented time-variable spherical harmonic coefficients, using deterministic regularized trend annual oscillation. main focus within process proper handling stochastic behavior input data. Appropriate noise modeling used results realistic information derived solution. information, full variance–covariance matrix, extremely useful further with, example, terrestrial published together primary consisting potential coefficients representing secular variations, available International Centre Global Earth Models (http://icgem.gfz-potsdam.de/, last access: 11 June 2020). set identified following DOI: https://doi.org/10.5880/ICGEM.2019.002 (Kvas et al., 2019b). Supplementary material matrix estimated co-seismic mass changes at https://ifg.tugraz.at/GOCO (last