Articles | Volume 18, issue 7
https://doi.org/10.5194/essd-18-5167-2026
https://doi.org/10.5194/essd-18-5167-2026
Data description article
 | 
21 Jul 2026
Data description article |  | 21 Jul 2026

A combination of time-variable gravity field solutions from multi-satellite datasets (1993–2024) via constrained collocation model

Lin Zhang, Yunzhong Shen, Nico Sneeuw, Peyman Saemian, Kunpu Ji, Qiujie Chen, and Fengwei Wang
Publisher's note: on 28 July 2026, a typo in the first sentence of Sect. 2.1 was corrected: “December 2020” was changed to “December 2024”.

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Short summary
This study develops monthly gapless, filter-free gravity field solutions from January 1993 to December 2024, which merge multiple satellite observations without hydrometeorological models, achieving better accuracy than current methods. Assessment of global sea level budget closures and regional water balance shows major gains. Ice sheet mass changes in Antarctic and Greenland show higher consistency with reference estimates, enabling reliable tracking of global water and ice systems.
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