A novel model of estimating sea state bias based on multi-layer neural network and multi-source altimeter data

作者：Miao, Hongli^*; Guo, Yingting; Zhong, Guoqiang; Liu, Benxiu; Wang, Guizhong

来源：European Journal of Remote Sensing, 2018, 51(1): 616-626.

DOI：10.1080/22797254.2018.1465361

• Sea state bias
• radar altimeter
• neural network

In this article, we propose a novel model for estimating sea state bias (SSB) based on multi-layer neural network and multi-source altimeter data from the Topex/Poseidon (T/P), Jason-2, and Jason-3 altimeters. Significant wave height (SWH), wind speed (U) and backscatter coefficient (sigma(0)) are considered as the inputs of the multi-layer neural network, while the corresponding SSB as outputs. The neural network has four layers, with structure 3-3-6-1. Data from three seasons are employed for the neural network training, and the trained model is applied for the SSB estimation on the HY-2 altimeter data. To show the effectiveness of the adopted model, the correlations between SSB and SWH, U and sigma(0) are analyzed. Moreover, the explained variance and residual error are compared with a conventional parametric model for SSB estimation. The results demonstrate that multi-layer neural network trained on multi-source altimeter data performs superior to the conventional SSB estimation model.

• 出版日期2018
• 单位中国海洋大学