高精度海表皮温红外辐射测量系统

High Accuracy Sea Surface Infrared Thermometer Radiometer System

海表温度是重要的环境特征指标。为了实时高精度测量海表皮温,中国海洋大学研制了一台海表测温辐射测量系统(The First Infrared Radiometer for measurements of Skin SST made by Ocean University of China,OUCFIRST,简称FIRST系统)。FIRST系统使用热释电辐射传感器,测量海表、天空和内部标准黑体的辐射量,对测量的海表辐射进行实时校正,得到精确的海表辐射值,通过反演计算,得到高精度海表皮温。FIRST系统内部使用了可溯源的测温仪,可测量标准黑体温度,该系统采用了自容式设计,测温精度高且部署容易。FIRST系统参加了2016年在英国国家物理实验室(National Physical Laboratory)NPL进行的联合观测实验,在实验室测量了标准黑体,在室外湖面进行了实测,测量结果优于33mK,测量准确度位列各参测仪器的第二名。实验结果表明,FIRST系统具有较好的测量精度,可用于海表皮温的高精度测量。

Sea surface temperature(SST)is the key indicator for environmental characteristic.In order to measure the sea surface temperature in real time and with high accuracy,a sea surface thermometer radiometer is developed by Ocean University of China(OUC FIRST).The radiometer uses pyroelectric radiation sensor to measure radiation from sea surface,sky and internal standard blackbodies.The measured sea surface radiation is corrected in real time to get accurate sea surface radiation value,and finally the high precision sea surface temperature is retrieved.The NIST traceable thermometer is used to measure the temperature of standard blackbodies inside the equipment,and the self-contained design is adopted.The high accuracy equipment is on-ready to be deployed.The FIRST radiometer participated the joint observation experiment conducted in the UK NPL in 2016.The indoor standard blackbody measurements and outdoor lake surface measurements show that the measurement results are better than 33 mK,which proves that the radiometer has good measurement accuracy and can be used for high-precision measurement of sea surface temperature.