The new gravity field models of gravity field and steady-state ocean circulation explorer (GOCE), TIM_R6 and DIR_R6, were released by the European Space Agency (ESA) in June 2019. The sixth generation of gravity models have the highest possible signal and lowest error levels compared with other GOCE-only gravity models, and the accuracy is significantly improved. This is an opportunity to build high precision geostrophic currents. The mean dynamic topography and geostrophic currents have been calculated by the 5th (TIM_R5 and DIR_R5), 6th (TIM_R6 and DIR_R6) release of GOCE gravity field models and ITSG-Grace2018 of GRACE gravity field model in this study. By comparison with the drifter results, the optimal filtering lengths of them have been obtained (for DIR_R5, DIR_R6, TIM_R5 and TIM_R6 models are 1° and for ITSG-Grace2018 model is 1.1°). The filtered results show that the geostrophic currents obtained by the GOCE gravity field models can better reflect detailed characteristics of ocean currents. The total geostrophic speed based on the TIM_R6 model is similar to the result of the DIR_R6 model with standard deviation (STD) of 0.320 m/s and 0.321 m/s, respectively. The STD of the total velocities are 0.333 m/s and 0.325 m/s for DIR_R5 and TIM_R5. When compared with ITSG-Grace2018 results, the STD (0.344 m/s) of total geostrophic speeds is larger than GOCE results, and the accuracy of geostrophic currents obtained by ITSG-Grace2018 is lower. And the absolute errors are mainly distributed in the areas with faster speeds, such as the Antarctic circumpolar circulation, equatorial region, Kuroshio and Gulf Stream areas. After the remove-restore technique was applied to TIM_R6 MDT, the STD of total geostrophic speeds dropped to 0.162 m/s.

欧洲航天局（ESA）于2019年6月发布了重力场和稳态海洋环流探测器（GOCE）的新重力场模型。第六代重力模型具有最高的信号和最低的重力与其他仅使用GOCE的重力模型相比，误差级别更高，并且精度得到了显着提高。这是建立高精度地转流的机会。本研究通过GOCE重力场模型的第5版（TIM_R5和DIR_R5），第6版（TIM_R6和DIR_R6）和GRACE重力场模型的ITSG-Grace2018版本计算了平均动态地形和地转流。通过与漂移结果比较，获得了它们的最佳滤波长度（对于DIR_R5，DIR_R6，TIM_R5和TIM_R6模型为1°，对于ITSG-Grace2018模型为1.1°）。滤波后的结果表明，GOCE重力场模型获得的地转流可以更好地反映洋流的详细特征。基于TIM_R6模型的总地转速度类似于DIR_R6模型的结果，标准偏差（STD）分别为0.320 m / s和0.321 m / s。对于DIR_R5和TIM_R5，总速度的STD为0.333 m / s和0.325 m / s。与ITSG​​-Grace2018结果相比，总地转速度的STD（0.344 m / s）大于GOCE结果，而ITSG-Grace2018获得的地转电流精度较低。绝对误差主要分布在速度较快的地区，如南极绕极环流，赤道地区，黑潮和墨西哥湾流地区。将删除恢复技术应用于TIM_R6 MDT之后，