Sun Weifu, Sangmanee Chalermrat, Jiang Yuanchi, Ma Yi, Li Jiang, Zhao Yujia
Lab of Marine Physics and Remote Sensing, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China.
Oceanography and Environment Division, Phuket Marine Biological Center, Phuket 830000, Thailand.
Sensors (Basel). 2023 Sep 6;23(18):7692. doi: 10.3390/s23187692.
China's marine satellite infrared radiometer SST remote sensing observations began relatively late. Thus, it is essential to evaluate and correct the SST observation data of the Ocean Color and Temperature Scanner (COCTS) onboard the China HY-1C satellite in the Southeast Asia seas. We conducted a quality assessment and correction work on the SST of the China COCTS/HY-1C in Southeast Asian seas based on multisource satellite SST data and temperature data measured by Argo buoys. The accuracy evaluation results of the COCTS SST indicated that the , , and of the daytime SST data for HY-1C were -0.73 °C, 1.38 °C, and 1.56 °C, respectively, while the , , and of the nighttime SST data were -0.95 °C, 1.57 °C, and 1.83 °C, respectively. The COCTS SST accuracy was significantly lower than that of other infrared radiometers. The effect of the COCTS SST zonal correction was most significant, with the and approaching 1 °C. After correction, the of the daytime SST and nighttime SST data decreased by 32.52% and 42.04%, respectively.
中国海洋卫星红外辐射计的海表温度（SST）遥感观测起步相对较晚。因此，对中国HY-1C卫星上的海洋水色水温扫描仪（COCTS）在东南亚海域的SST观测数据进行评估和校正至关重要。我们基于多源卫星SST数据和Argo浮标实测温度数据，对中国COCTS/HY-1C在东南亚海域的SST开展了质量评估和校正工作。COCTS SST的精度评估结果表明，HY-1C白天SST数据的平均绝对误差（MAE）、均方根误差（RMSE）和平均偏差（MB）分别为-0.73℃、1.38℃和1.56℃，而夜间SST数据的MAE、RMSE和MB分别为-0.95℃、1.57℃和1.83℃。COCTS SST精度显著低于其他红外辐射计。COCTS SST纬向校正效果最为显著，MAE和RMSE接近1℃。校正后，白天SST和夜间SST数据的MB分别下降了32.52%和42.04%。
