DOT2008A海面地形模型在我国邻近海域的精度评估

Accuracy Assessment of DOT2008A Sea Surface Topography Model in Adjacent Sea Areas of China

文中首先介绍了DOT2008A模型建立的原理和方法,利用我国48个长期验潮站19 a连续观测数据验证DOT2008A模型的精度,其均方差为0.118 m,残差的标准偏差为0.086 m;联合多源测高卫星建立的海面地形模型数据验证DOT2008A的精度,均方差为0.106 m,残差的标准偏差为0.099 5 m,且其残差分布图基本符合正态分布。从实验结果来看,DOT2008A模型在我国周边海域精度较高,其建立方法较为合理,转化应用价值较高;同时与多源测高卫星建立的海面地形比较结果来看,验证了自主建立的海面地形模型的正确性,对建立我国高精度海面地形模型具有重要的借鉴意义。

This paper firstly introduces the principle and method of establishing DOT2008A model.The accuracy of DOT2008A model is verified by 19 years of continuous observation data from 48 long-term tidal stations in China.The mean square deviation is 0.118 m and the standard deviation of residuals is 0.086 m.The sea surface topography model data established by the joint multi-source altimetry satellite verified the accuracy of DOT2008A.The mean square error was 0.106 m,the standard deviation of the residual error was 0.099 5 m,and the residual distribution basically conforms to the normal distribution.According to the experimental results,the DOT2008A model is of high accuracy in the surrounding sea areas of China,its establishment method is proved to be reasonable,and it has high transformation application value.At the same time,compared with the sea surface topography established by multi-source altimetry satellite,the correctness of the independently established sea surface topography model is verified in this paper.