Chen Yifu, Zhu Zhen, Le Yuan, Qiu Zhenge, Chen Gang, Wang Lizhe
Opt Express. 2021 Jan 18;29(2):2411-2430. doi: 10.1364/OE.409941.
In nearshore bathymetry based on the Ice, Cloud, and Land Elevation Satellite-2 (ICESat-2), water refraction causes a position displacement of the seafloor signal photon, decreasing the bathymetric accuracy. A novel refraction-correction method is proposed for the ICESat-2. Based on the experimental results and statistical analysis, it is illustrated that the displacement in elevation direction reaches several meters at the relative depth. The displacement in the along- and cross-track directions is very small, ranging from millimeters to centimeters. Finally, the relationship of refraction displacements with various incident angles and water depths is analyzed in detail, revealing the nearshore bathymetry characteristics of ICESat-2.
在基于冰、云和陆地高程卫星2号（ICESat-2）的近岸测深中，水折射会导致海底信号光子产生位置位移，从而降低测深精度。针对ICESat-2提出了一种新颖的折射校正方法。基于实验结果和统计分析表明，在相对深度处，高程方向的位移可达数米。沿轨和跨轨方向的位移非常小，范围从毫米到厘米。最后，详细分析了折射位移与各种入射角和水深的关系，揭示了ICESat-2的近岸测深特征。
