Sentinel-3A卫星测高数据监测长江中下游河流水位变化

娄燕寒, 廖静娟, 陈嘉明

Monitoring water level changes in the middle and lower reaches of the Yangtze River using Sentinel-3A satellite altimetry data

LOU Yanhan, LIAO Jingjuan, CHEN Jiaming

表1 不同重跟踪算法得到的Sentinel-3A/SRAL 高度计水位与实测水位比较结果

Tab.1 Comparison of Sentinel-3A/SRAL altimeter water levels obtained by different re-tracking algorithms and in- situ water level

算法 指标 038 089 095 146 152 203 260 266 309 323 360 366 MWaPP R M S E/m 1.545 1.524 1.708 1.695 1.256 1.338 0.872 1.601 1.246 0.553 1.074 1.681 r 0.897 0.915 0.631 0.818 0.937 0.627 0.965 0.686 0.930 0.953 0.901 0.864 d 54 51 42 29 70 45 51 52 60 57 58 53 NPPOR R M S E/m 1.442 1.439 1.630 1.638 1.205 1.389 0.859 1.427 1.261 0.719 1.105 1.475 r 0.924 0.902 0.707 0.882 0.944 0.662 0.965 0.769 0.929 0.937 0.886 0.916 d 60 43 35 34 70 45 47 57 58 58 60 51 NPPTR05 R M S E/m 1.462 1.459 1.730 1.616 1.223 1.605 0.867 1.407 1.284 0.610 1.028 1.630 r 0.921 0.892 0.642 0.892 0.944 0.561 0.963 0.771 0.930 0.950 0.892 0.873 d 60 46 38 35 73 49 49 57 59 58 59 58 NPPTR08 R M S E/m 1.333 1.667 1.714 1.844 1.202 1.572 0.864 1.476 1.255 0.676 1.048 1.579 r 0.934 0.916 0.686 0.868 0.944 0.578 0.964 0.734 0.932 0.930 0.890 0.880 d 58 50 37 38 65 45 48 55 59 57 60 54 OCOG R M S E/m 1.145 1.409 1.469 1.469 1.201 1.197 0.841 1.158 1.126 0.881 0.680 1.565 r 0.952 0.866 0.667 0.891 0.941 0.840 0.968 0.824 0.940 0.893 0.941 0.891 d 61 45 43 47 63 45 45 57 58 58 60 47