自动多波段红外海洋表面温度辐射系统研究

针对我国海洋遥感定标检验技术的研究,设计了一种能够自动测量海水表面温度的多波段红外辐射系统,其分辨率优于0.1℃,精度优于±0.5℃。系统采用了4个波段,即3.5～4.0μm,8～13μm,10.3～11.3μm和11.5～12.3μm。内部光学系统通过两个不同温度的参考黑体进行实时校正,保证光学系统被盐雾沉积后也不影响整个系统的精度。另外,为了防止恶劣天气对系统的影响,还设计了一个由雨量传感器触发的自动保护罩。通过实验室标定和岸边实验对系统精度和稳定性进行了实验验证。

Study on a Multi-Spectral-Band Infrared Sea Surface Temperature Radiometer System

A multi-spectral infrared radiometer system is designed that can be used to measure sea surface temperature automatically, whose resolution ratio and accuracy are better than 0.1 ℃ and ±0.5 ℃, respectively. The system adopts four spectral bands, i.e., 3.5～4.0 μm, 8～13 μm, 10.3～11.3 μm, and 11.5～12.3 μm. Its inner optical system carries out real time calibration by two blackbody reference cavities with different temperatures, which promises that the high accuracy of an infrared radiometer is maintained even when optical components are moderately contaminated by salt deposition. Moreover, a protection shutter which could be automatically triggered by a sensitive rain gauge is designed to resist against foul weather. Finally, the accuracy and stability of the system are tested by laboratory calibration and shoreside experiment.