风云三号卫星微波成像仪海面温度产品检验

目的方法 利用全球海-气综合数据集(ICOADS),对FY-3C MWRI海面温度产品按照升降轨进行检验,并对不同风速及太阳辐射(白天、夜晚)条件下的检验结果进行分析.结果 FY-3C MWRI SST产品升轨绝对误差为0.950 K,均方根误差为1.278 K;降轨绝对误差为1.186 K,均方根误差为1.692 K,升轨精度优于降轨精度.分别对风速小于6 m/s、6～12 m/s以及大于12 m/s时的绝对误差、均方根误差进行分析,高风速(>12 m/s)以及白天低风速(0～6 m/s)条件下,均会导致卫星反演海温与实测海温之间差异的增加.结论 该研究结果对改进算法模型,提高产品的质量和可信度有重要的参考价值.

Inspection of FY-3 MWRI Sea Surface Temperature Products

FY-3C MWRI sea surface temperature products are tested according to the lifting orbit, using the International Comprehensive Ocean-Atmosphere Data Set (ICOADS), and the inspected results of different wind speeds and of different solar radiation (day and night) are analyzed. The results show that the absolute error of ascending orbit for FY-3C MWRI SST product is 0.950 K, the root mean square error is 1.278 K, the absolute error of descending track is 1.186 K, the root mean square error is 1.692 K, indicating that the precision of ascending orbit is better than that of descending orbit; The absolute error and root mean square error are analyzed against the wind speed being less than 6 m/s, 6~12 m/s and greater than 12m/s. Results show that the discrepancy between satellite estimated SST and measured SST will increase under the conditions of high wind speed (>12 m/s) and low wind speed (0~6 m/s) in the day time. This research is of great significance for improving the algorithm model and the quality and credibility of products.