Abstract. This article focuses on the determination and the validation of a new global mean sea surface (MSS) model which is named as SDUST2020 (Shandong University of Science and Technology 2020) with a grid of 1′×1′. This new model is established with 19-year moving average method and merges multi-satellite altimetry data over 27-year (from January 1993 to December 2019). The data of HY-2A, Jason-3 and Sentinel-3A are first ingested in the SDUST2020 MSS, but not in any other global MSS model, such as CLS15 and DTU18 MSS models. Validations, including the comparison with CLS15 and DTU18 MSS models, the comparison with GPS-leveled tide gauges and the comparison with altimeter data, are performed to estimate the quality of the SDUST2020 MSS model, and all the results show that the SDUST2020 MSS model is accurate and reliable. The SDUST2020 MSS dataset are freely available at the site (data DOI: https://doi.org/10.5281/zenodo.6555990, Yuan et al., 2022).

中文翻译：

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SDUST2020 MSS：由多卫星测高数据确定的全球 1'×1' 平均海面模型

摘要。本文重点研究了一个新的全球平均海面（MSS）模型的确定和验证，该模型命名为 SDUST2020（山东科技大学 2020），网格为 1′×1′。该模型采用 19 年移动平均法建立，融合了 27 年（1993 年 1 月至 2019 年 12 月）的多卫星测高数据。HY-2A、Jason-3 和 Sentinel-3A 的数据首先被摄取到 SDUST2020 MSS 中，而不是在任何其他全球 MSS 模型中，例如 CLS15 和 DTU18 MSS 模型。通过与 CLS15 和 DTU18 MSS 模型的比较、与 GPS 水平潮汐计的比较以及与高度计数据的比较等验证，对 SDUST2020 MSS 模型的质量进行了评估，所有结果表明 SDUST2020 MSS 模型是准确可靠。