红外四谱段测温辐射计的电子学设计与实现

为了给卫星上的红外辐射计做地面定标检测而设计了一种能自动测量海水表面温度的四谱段红外辐射计。文中针对红外辐射计的电子学系统进行了详细的设计，通过分光调制分别对3.5~4m，8~13 m，10.3~11.3 m，11.5~12.3 m 4种波段的红外辐射进行采集和处理，利用双黑体标准辐射源实时自动校正系统参数和相应算法计算出当前海水表面的温度，并能在PC 机上实时显示温度和保存数据的一种红外辐射系统。另外，通过A/D 采样设计保证了系统采样分辨率0.1 K 的要求。最后，通过分析该辐射计在南海所获得的数据，得到该系统满足了测温精度依0.5 K的技术指标要求。

Infrared four spectral temperature radiometer electronics design and implemention

A four-spectral infrared radiometer, which can automatically measure the temperature of sea surface, was designed to calibration and test the satellite on ground. The electronics system of the infrared radiometer was designed in detail using the spectral modulation, the wave length of 3.5-4 m, 8-13 m, 10.3-11.3 m, 11.5-12.3 m infrared band was used to acquire and process the data. The temperature of the sea surface was computed by double blackbody standard source real-time automatic correction system parameters and corresponding algorithm. The designed infrared system could also display the temperature and save the data synchronously on PC. In addition, the requirement of sampling precision of 0.1K was guaranteed by the design of A/D sampling. Finally, by analying the data acquired in south China sea, the measure precision of the system was verified in 0.5 K, which can satisfy the technical requirement.